def get_diagram_one(ax, fermion_style, boson_style, vertex_style):
D = Diagram(ax)
w = 0.75
xy0 = [0.5 - w / 2, 0.25]
v1 = D.vertex(xy0, **vertex_style)
v2 = D.vertex(v1.xy, dx=w, **vertex_style)
G = D.line(v1, v2, **fermion_style)
B = D.line(v1, v2, **boson_style)
# In case the axes get smaller (you have more diagrams), you might want to change the scale
D.scale(1.0)
D.plot()
return D
def get_diagram_one(ax, fermion_style, boson_style, vertex_style):
D = Diagram(ax)
w = 0.75
xy0 = [0.5 - w/2, 0.25]
v1 = D.vertex(xy0, **vertex_style)
v2 = D.vertex(v1.xy, dx=w, **vertex_style)
G = D.line(v1, v2, **fermion_style)
B = D.line(v1, v2, **boson_style)
# In case the axes get smaller (you have more diagrams), you might want to change the scale
D.scale(1.0)
D.plot()
return D
diagram = Diagram(ax)
diagram.text(.4,0.9,"Doubly Charged Higgs Production", fontsize=40)
q1in = diagram.vertex(xy=(.1,.75), marker='')
q2in= diagram.vertex(xy=(.1,.25), marker='')
v1 = diagram.vertex(xy=(.3,.75))
v2 = diagram.vertex(xy=(.3,.25))
vmerge = diagram.vertex(xy=(.6,.5))
higgsout = diagram.vertex(xy=(.8,.5))
q1pout = diagram.vertex(xy=(.95,.75), marker='')
q2pout = diagram.vertex(xy=(.95,.25), marker='')
l1out = diagram.vertex(xy=(.95,.62), marker='')
l2out = diagram.vertex(xy=(.95,.38), marker='')
lw = 5
# Quarks
q1 = diagram.line(q1in, v1, color='blue', lw=lw, arrow_param=dict(color='blue', length=0.08, width=0.02))
q2 = diagram.line(q2in, v2, color='blue', lw=lw, arrow_param=dict(color='blue', length=0.08, width=0.02))
q1p = diagram.line(v1, q1pout, color='blue', lw=lw, arrow_param=dict(color='blue', length=0.08, width=0.02))
q2p = diagram.line(v2, q2pout, color='blue', lw=lw, arrow_param=dict(color='blue', length=0.08, width=0.02))
diagram.text(.05, 0.75, "q", fontsize=40)
diagram.text(.05, 0.25, "q",fontsize=40)
diagram.text(0.98, 0.75, r"$\mathrm{q}^\prime$", fontsize=40)
diagram.text(0.98, 0.25, r"$\mathrm{q}^\prime$",fontsize=40)
# Bosons
w1 = diagram.line(v1, vmerge, style='wiggly', color='green', lw=lw)
w2 = diagram.line(v2, vmerge, style='wiggly', color='green', lw=lw)
higgs = diagram.line(vmerge, higgsout, arrow=False, ls='dashed', lw=lw, dashes=(4, 2))
diagram.text(0.35, 0.6, r"$W^+$", fontsize=40)
diagram.text(0.35, 0.38, r"$W^+$", fontsize=40)
diagram.text(0.72, 0.55, r"$H^{++}$", fontsize=40)
opwidth = 0.3
linlen = 0.4
tail_marker = "o"
W_style = dict(style="double wiggly", nwiggles=2)
v_style = dict(style="simple wiggly", nwiggles=2)
D = Diagram(ax)
arrowparam = dict(width=0.05)
xy = [0.2, y0]
v01 = D.verticle(xy, marker=tail_marker)
xy[0] += linlen
v02 = D.verticle(v01.xy, dx=linlen, marker=tail_marker)
W = D.line(v01, v02, **W_style)
text_prop = dict(y=0.06, fontsize=22)
W.text("$W$", **text_prop)
D.text(0.75, y0, "=", fontsize=30)
xy = [0.9, y0]
v21 = D.verticle(xy, marker=tail_marker)
v22 = D.verticle(v21.xy, dx=linlen, marker=tail_marker)
v = D.line(v21, v22, **v_style)
v.text("$v$", **text_prop)
D.text(1.45, y0, "+", fontsize=30)
# Define line styles
G_style = dict(
style='double elliptic',
ellipse_excentricity=-1.2,
ellipse_spread=.3,
arrow=True,
arrow_param={'width': 0.05},
)
# Draw the diagram
v01 = d.vertex([x0, y0])
v02 = d.vertex(v01.xy, dx=opwidth)
P = d.operator([v01, v02], c=1.3)
P.text("$P$")
d.text(v02.x + textpad, y0, "=", fontsize=30)
v21 = d.vertex(v02.xy, dx=.4)
v22 = d.vertex(v21.xy, dx=linlen, dy=Gamma_side / 2)
v23 = d.vertex(v21.xy, dx=linlen, dy=-Gamma_side / 2)
v24 = d.vertex(v21.xy, dx=linlen + Gamma_height)
l21 = d.line(v22, v21, **G_style)
l21 = d.line(v21, v23, **G_style)
Gamma = d.operator([v22, v23, v24])
Gamma.text("$\Gamma$")
d.draw()
plt.show()
D = Diagram(ax)
v11 = D.vertex([.1, .08])
v12 = D.vertex(v11.xy, dx=.15)
Sigma = D.operator([v11, v12])
Sigma.text("$\Sigma$")
# Symbols
D.text(v12.x + .1, v12.y, "=")
# GW convolution
v21 = D.vertex(v12.xy, dxy=[0.2, -0.04])
v22 = D.vertex(v21.xy, dx=0.4)
l21 = D.line(v21, v22, style='double', arrow=True)
# Specifying the number of wiggles and the amplitude of the wiggles
l22 = D.line(v21,
v22,
style='double wiggly elliptic',
nwiggles=5.5,
amplitude=0.015)
# 't' is the coordinate along the line (from 0 to 1)
l21.text("G", t=0.4, y=.025, fontsize=24)
l22.text("W", y=-.06, fontsize=24)
# Plot and show
D.plot()
plt.show()
xy = [0.2, y0]
v01 = D.verticle(xy)
xy[0] += opwidth
v02 = D.verticle(xy)
Sigma = D.operator([v01, v02])
Sigma.text("$\Sigma$")
D.text(.70, y0, "=", fontsize=30)
xy[1] = y0 - 0.07
xy[0] = 0.9
v21 = D.verticle(xy)
xy[0] += linlen
v22 = D.verticle(xy)
l21 = D.line(v21, v22, **G_style)
l22 = D.line(v21, v22, **W_style)
l21.text("G", y=.05)
l22.text("W", y=-.1)
D.plot()
fig.savefig('pdf/gw-Sigma.pdf')
fig.savefig('pdf/gw-Sigma.png')
import matplotlib.pyplot as plt
from feynman import Diagram
fig = plt.figure(figsize=(10., 10.))
ax = fig.add_axes([0, 0, 1, 1], frameon=False)
diagram = Diagram(ax)
diagram.text(.4, 0.9, "Associated Vector Boson", fontsize=40)
diagram.text(.6, 0.83, "(VH or 'Higgs Strahlung')", fontsize=40)
in1 = diagram.vertex(xy=(.1, .75), marker='')
in2 = diagram.vertex(xy=(.1, .25), marker='')
v1 = diagram.vertex(xy=(.35, .5))
v2 = diagram.vertex(xy=(.65, .5))
higgsout = diagram.vertex(xy=(.9, .75))
out1 = diagram.vertex(xy=(.9, .25), marker='')
q1 = diagram.line(in1, v1)
q2 = diagram.line(v1, in2)
wz1 = diagram.line(v1, v2, style='wiggly')
wz2 = diagram.line(v2, out1, style='wiggly')
higgs = diagram.line(v2, higgsout, arrow=False, style='dashed')
q1.text("q", fontsize=30)
q2.text(r"$\bar{\mathrm{q}}$", fontsize=30)
diagram.text(0.5, 0.55, "$Z/W^\pm$", fontsize=30)
diagram.text(0.69, 0.35, "$Z/W^\pm$", fontsize=30)
higgs.text("H", fontsize=30)
diagram.plot()
plt.show()
fig = matplotlib.pyplot.figure(figsize=(1., 1.))
ax = fig.add_axes([0, 0, 10, 10], frameon=False)
diagram = Diagram(ax)
diagram.text(.5, 0.9, "Associated Top Pair (ttH)", fontsize=40)
in1 = diagram.verticle(xy=(.1, .8), marker='')
in2 = diagram.verticle(xy=(.1, .2), marker='')
v1 = diagram.verticle(xy=(.4, .7))
v2 = diagram.verticle(xy=(.4, .3))
v3 = diagram.verticle(xy=(.6, .5))
out1 = diagram.verticle(xy=(.9, .8), marker='')
out2 = diagram.verticle(xy=(.9, .2), marker='')
higgsout = diagram.verticle(xy=(.9, .5))
g1 = diagram.line(in1, v1, style='loopy', nloops=7, yamp=0.04)
g2 = diagram.line(in2, v2, style='loopy', nloops=7, yamp=0.04)
t1 = diagram.line(v3, v1, arrow=True)
t2 = diagram.line(v2, v3, arrow=True)
higgs = diagram.line(v3, higgsout, arrow=False, style='dashed')
t3 = diagram.line(v1, out1, arrow=True)
t4 = diagram.line(out2, v2, arrow=True)
g1.text("g", fontsize=30)
g2.text("g", fontsize=30)
diagram.text(v3.xy[0], v3.xy[1] + 0.1, r"$\bar{\mathrm{t}}$", fontsize=35)
t2.text("t", fontsize=30)
t3.text("t", fontsize=30)
t4.text(r"$\bar{\mathrm{t}}$", fontsize=30)
higgs.text("H", fontsize=35)
from feynman import Diagram
fig = plt.figure(figsize=(10.,10.))
ax = fig.add_axes([0,0,1,1], frameon=False)
diagram = Diagram(ax)
in1 = diagram.vertex(xy=(.1,.6), marker='')
in2= diagram.vertex(xy=(.1,.4), marker='')
v1 = diagram.vertex(xy=(.4,.6))
v2 = diagram.vertex(xy=(.4,.4))
v3 = diagram.vertex(xy=(.6,.5))
v4 = diagram.vertex(xy=(.34,.5), marker='')
higgsout = diagram.vertex(xy=(.9,.5))
epsilon = diagram.operator([v4,v3], c=1.1)
epsilon.text("Effective \n coupling", fontsize=30)
gluon_up_style = dict(style='linear loopy', xamp=.025, yamp=.035, nloops=7)
gluon_down_style = dict(style='linear loopy', xamp=.025, yamp=-.035, nloops=7)
g1 = diagram.line(in1, v1, **gluon_up_style)
g2 = diagram.line(in2, v2, **gluon_down_style)
higgs = diagram.line(v3, higgsout, arrow=False, style='dashed')
g1.text("g",fontsize=30)
diagram.text(v4.xy[0]-.08, v4.xy[1]-.05, "g",fontsize=35)
higgs.text("H",fontsize=30)
diagram.plot()
plt.show()
ax.set_ylim(0, .3)
y0 = sum(ax.get_ylim()) / 2
l = 0.4
x0 = .05
G_style = dict(arrow=True, arrow_param={'width': 0.05}, style='double')
G0_style = dict(arrow=True, arrow_param={'width': 0.05}, style='simple')
D = Diagram(ax)
x = x0
v01 = D.verticle(xy=(x, y0))
v02 = D.verticle(v01.xy, dx=l)
G = D.line(v01, v02, **G_style)
text_prop = dict(y=0.05, fontsize=20)
G.text("$G$", **text_prop)
x = x0 + .55
D.text(x, y0, "=", fontsize=30)
x = x0 + .7
v21 = D.verticle(xy=(x, y0))
v22 = D.verticle(v21.xy, dx=l)
G0 = D.line(v21, v22, **G0_style)
G0.text("$G_0$", **text_prop)
x = x0 + 1.25
D.text(x, y0, "+", fontsize=30)
# Line styles
Ph_style = dict(style='elliptic loopy', ellipse_spread=.6, xamp=.10, yamp=-.15, nloops=15)
DW_style = dict(style='circular loopy', circle_radius=.7, xamp=.10, yamp=.15, nloops=18)
G_style = dict(style='simple', arrow=True, arrow_param={'width':0.15, 'length': .3})
# Item 1
v11 = D.vertex([D.x0, D.y0])
v12 = D.vertex(v11.xy, dx=opwidth)
Sigma = D.operator([v11, v12])
Sigma.text("$\Sigma^{ep}$")
# Symbol
D.text(v12.x + txtpad, D.y0, "=")
# Item 3
v21 = D.vertex([v12.x + 2 * txtpad, D.y0 - 0.3])
v22 = D.vertex(v21.xy, dx=linlen)
G = D.line(v21, v22, **G_style)
Ph = D.line(v21, v22, **Ph_style)
# Symbol
D.text(v22.x + txtpad, D.y0, "+")
# Item 3
v31 = D.vertex([v22.x + 3 * txtpad, D.y0 - 0.3])
DW = D.line(v31, v31, **DW_style)
D.plot()
plt.show()
opwidth = 0.3
linlen = 0.4
W_style = dict(style='double wiggly', nwiggles=2)
v_style = dict(style='simple wiggly', nwiggles=2)
# First diagram
D1 = Diagram(ax)
xy = [0.2, y0]
v01 = D1.verticle(xy)
xy[0] += linlen
v02 = D1.verticle(v01.xy, dx=linlen)
W = D1.line(v01, v02, **W_style)
text_prop = dict(y=0.06, fontsize=22)
W.text("$W$", **text_prop)
D1.text(.75, y0, "=", fontsize=30)
xy = [0.9, y0]
v11 = D1.verticle(xy)
v13 = D1.verticle(v11.xy, dx=opwidth)
v14 = D1.verticle(v13.xy, dx=linlen)
O = D1.operator([v11,v13], c=1.1)
O.text("${\\varepsilon^{-1}}$", x=.0, y=.01, fontsize=35)
D1.line(v13, v14, **v_style)
"""
import matplotlib.pyplot as plt
from feynman import Diagram
fig = plt.figure(figsize=(10.,10.))
ax = fig.add_axes([0,0,1,1], frameon=False)
diagram = Diagram(ax)
in1 = diagram.vertex(xy=(.1,.5))
in2= diagram.vertex(xy=(.4,.5))
v1 = diagram.vertex(xy=(.65,.65))
v2 = diagram.vertex(xy=(.65,.35))
out1 = diagram.vertex(xy=(.9,.65),marker='')
out2 = diagram.vertex(xy=(.9,.35),marker='')
higgs = diagram.line(in1, in2, arrow=False, style='dashed')
nu1 = diagram.line(v1, in2)
nu2 = diagram.line(in2, v2)
w = diagram.line(v1, v2, style='wiggly')
lep = diagram.line(out1, v1)
tau = diagram.line(v2, out2)
nu1.text(r"$\nu_\ell$",fontsize=40)
nu2.text(r"$\nu_\tau$",fontsize=40)
lep.text(r"$\ell^+$",fontsize=40)
tau.text(r"$\tau^-$",fontsize=40)
diagram.text(0.72,0.5,"$W^\pm$",fontsize=40)
higgs.text("H",fontsize=40)
diagram.plot()
plt.show()
ax.set_ylim(0, .15)
l = 0.15 # Length of the propagator
txt_l = 0.05 # Padding around the symbol
op_l = 0.08 # Size of the operator
G_style = dict(arrow=True, arrow_param={'width':0.02, 'length': 0.05}, style = 'double')
G0_style = dict(arrow=True, arrow_param={'width':0.02, 'length': 0.05}, style = 'simple')
text_prop = dict(y=0.02, fontsize=20)
D = Diagram(ax)
# Left hand side
v11 = D.vertex(xy=[0.05, 0.06])
v12 = D.vertex(v11.xy, dx=l)
G = D.line(v11, v12, **G_style)
G.text("$G$", **text_prop)
# Symbol
D.text(v12.x + txt_l, v12.y, "=")
# First term
v21 = D.vertex(v12.xy, dx=2*txt_l)
v22 = D.vertex(v21.xy, dx=l)
G0 = D.line(v21, v22, **G0_style)
G0.text("$G_0$", **text_prop)
# Symbol
D.text(v22.x + txt_l, v22.y, "+")
# Second term
from feynman import Diagram
fig = matplotlib.pyplot.figure(figsize=(1., 1.))
ax = fig.add_axes([0, 0, 10, 10], frameon=False)
diagram = Diagram(ax)
in1 = diagram.verticle(xy=(.1, .8), marker='')
in2 = diagram.verticle(xy=(.1, .2), marker='')
v1 = diagram.verticle(xy=(.5, .7))
v2 = diagram.verticle(xy=(.5, .3))
v3 = diagram.verticle(xy=(.5, .5))
out1 = diagram.verticle(xy=(.9, .8), marker='')
out2 = diagram.verticle(xy=(.9, .2), marker='')
higgsout = diagram.verticle(xy=(.9, .5))
q1 = diagram.line(in1, v1, arrow=False)
q2 = diagram.line(in2, v2, arrow=False)
wz1 = diagram.line(v1, v3, style='wiggly')
wz2 = diagram.line(v2, v3, style='wiggly')
higgs = diagram.line(v3, higgsout, style='dashed', arrow=False)
q3 = diagram.line(v1, out1, arrow=False)
q4 = diagram.line(v2, out2, arrow=False)
q1.text(r"$\bar{q}$", fontsize=30)
q2.text("$Q$", fontsize=30)
diagram.text(v3.xy[0] + 0.12, v3.xy[1] + 0.11, "$Z/W^\pm$", fontsize=30)
wz2.text("$Z/W^\pm$", fontsize=30)
q3.text(r"$\bar{q}$", fontsize=30)
q4.text("$Q$", fontsize=30)
higgsout.text("$H$", fontsize=30)
ax.set_ylim(0, .3)
y0 = sum(ax.get_ylim()) / 2
l = 0.4
x0 = .05
G_style = dict(arrow=True, arrow_param={'width':0.05}, style = 'double')
G0_style = dict(arrow=True, arrow_param={'width':0.05}, style = 'simple')
D = Diagram(ax)
x = x0
v01 = D.verticle(xy=(x,y0))
v02 = D.verticle(v01.xy, dx=l)
G = D.line(v01, v02, **G_style)
text_prop = dict(y=0.05, fontsize=20)
G.text("$G$", **text_prop)
x = x0 + .55
D.text(x, y0, "=", fontsize=30)
x = x0 + .7
v21 = D.verticle(xy=(x,y0))
v22 = D.verticle(v21.xy, dx=l)
G0 = D.line(v21, v22, **G0_style)
G0.text("$G_0$", **text_prop)
x = x0 + 1.25
D.text(x, y0, "+", fontsize=30)
diagram.text(.4, 0.9, "Doubly Charged Higgs Production", fontsize=40)
in1 = diagram.vertex(xy=(.1, .75), marker='')
in2 = diagram.vertex(xy=(.1, .25), marker='')
v1 = diagram.vertex(xy=(.35, .5))
v2 = diagram.vertex(xy=(.65, .5))
higgsplusout = diagram.vertex(xy=(.8, .7))
higgsminusout = diagram.vertex(xy=(.8, .3))
l1plus = diagram.vertex(xy=(.95, .8), marker='')
l2plus = diagram.vertex(xy=(.95, .6), marker='')
l1minus = diagram.vertex(xy=(.95, .4), marker='')
l2minus = diagram.vertex(xy=(.95, .2), marker='')
lw = 5
q1 = diagram.line(v1,
in1,
color='blue',
lw=lw,
arrow_param=dict(color='blue', length=0.08, width=0.02))
q2 = diagram.line(in2,
v1,
color='blue',
lw=lw,
arrow_param=dict(color='blue', length=0.08, width=0.02))
l1 = diagram.line(l1plus,
higgsplusout,
color='blue',
lw=lw,
arrow_param=dict(color='blue', length=0.08, width=0.02))
l2 = diagram.line(l2plus,
higgsplusout,
color='blue',
D.text(.75, y0, "=", fontsize=30)
v30 = D.verticle([1.05, y0])
n1 = np.array([-np.sqrt(3)/6, .5])
n2 = np.array([-np.sqrt(3)/6,-.5])
n3 = np.array([ np.sqrt(3)/3, .0])
chunkdist = .05
v310 = D.verticle(v30.xy, dxy=n1*chunkdist, marker='')
v320 = D.verticle(v30.xy, dxy=n2*chunkdist, marker='')
v330 = D.verticle(v30.xy, dxy=n3*chunkdist, marker='')
chunklen = .05
v31 = D.verticle(v310.xy, dxy=n1*chunklen, marker='')
v32 = D.verticle(v320.xy, dxy=n2*chunklen, marker='')
v33 = D.verticle(v330.xy, dxy=n3*chunklen, marker='')
chunkstyle=dict(arrow=False, linewidth=6.)
D.line(v310, v31, **chunkstyle)
D.line(v320, v32, **chunkstyle)
D.line(v330, v33, **chunkstyle)
D.plot()
fig.savefig('pdf/gw-Gamma.pdf')
from feynman import Diagram
fig = matplotlib.pyplot.figure(figsize=(1., 1.))
ax = fig.add_axes([0, 0, 10, 10], frameon=False)
diagram = Diagram(ax)
#diagram.text(.5,0.9,"Gluon-Gluon Fusion (ggF)",fontsize=40)
in1 = diagram.verticle(xy=(.1, .7), marker='')
in2 = diagram.verticle(xy=(.1, .3), marker='')
v1 = diagram.verticle(xy=(.4, .7))
v2 = diagram.verticle(xy=(.4, .3))
v3 = diagram.verticle(xy=(.6, .5))
higgsout = diagram.verticle(xy=(.9, .5))
gluon_style = dict(style='linear loopy', xamp=.025, yamp=.035, nloops=7)
g1 = diagram.line(in1, v1, **gluon_style)
g2 = diagram.line(in2, v2, **gluon_style)
t1 = diagram.line(v1, v2)
t2 = diagram.line(v2, v3)
t3 = diagram.line(v3, v1)
higgs = diagram.line(v3, higgsout, arrow=False, style='dashed')
g1.text("g", fontsize=30)
g2.text("g", fontsize=30)
t1.text("t", fontsize=30)
t2.text("t", fontsize=30)
t3.text(r"$\bar{\mathrm{t}}$", fontsize=35)
higgs.text("H", fontsize=30)
diagram.plot()
fig.savefig('pdf/ggF-SM.pdf', bbox_inches='tight')
v30 = D.verticle(v02.xy, dx=2 * obj_spacing)
n1 = np.array([-1., 0.])
n2 = np.array([1., 0.])
chunkdist = .03
v310 = D.verticle(v30.xy, dxy=n1 * chunkdist, marker='')
v320 = D.verticle(v30.xy, dxy=n2 * chunkdist, marker='')
chunklen = .025
v31 = D.verticle(v310.xy, dxy=n1 * chunklen, marker='')
v32 = D.verticle(v320.xy, dxy=n2 * chunklen, marker='')
chunkstyle = dict(arrow=False, linewidth=6.)
D.line(v310, v31, **chunkstyle)
D.line(v320, v32, **chunkstyle)
D.text(v30.xy[0] + obj_spacing, y0, "-", fontsize=40)
xy = [1.6, y0]
v11 = D.verticle(v30.xy, dx=2 * obj_spacing)
v12 = D.verticle(v11.xy, dx=linlen)
v13 = D.verticle(v12.xy, dx=opwidth)
D.line(v11, v12, **v_style)
O = D.operator([v12, v13], c=1.3)
O.text("$P$")
D.plot()
opwidth = 0.3
linlen = 0.4
tail_marker = 'o'
W_style = dict(style='double wiggly', nwiggles=2)
v_style = dict(style='simple wiggly', nwiggles=2)
D = Diagram(ax)
arrowparam = dict(width=0.05)
xy = [0.2, y0]
v01 = D.verticle(xy, marker=tail_marker)
xy[0] += linlen
v02 = D.verticle(v01.xy, dx=linlen, marker=tail_marker)
W = D.line(v01, v02, **W_style)
text_prop = dict(y=0.06, fontsize=22)
W.text("$W$", **text_prop)
D.text(.75, y0, "=", fontsize=30)
xy = [0.9, y0]
v21 = D.verticle(xy, marker=tail_marker)
v22 = D.verticle(v21.xy, dx=linlen, marker=tail_marker)
v = D.line(v21, v22, **v_style)
v.text("$v$", **text_prop)
D.text(1.45, y0, "+", fontsize=30)
"""
import matplotlib.pyplot as plt
from feynman import Diagram
# If no Axes is given, a new one is initialized.
diagram = Diagram()
# Create four vertices.
v1 = diagram.vertex(xy=(.1, .5), marker='')
v2 = diagram.vertex(v1.xy, dx=.2)
v3 = diagram.vertex(v2.xy, dx=.4)
v4 = diagram.vertex(v3.xy, dx=.2, marker='')
# Create four lines.
# By default, 'simple' lines have arrows
# and others flavours such as 'wiggly' or 'loopy' don't.
l12 = diagram.line(v1, v2)
l23 = diagram.line(v2, v3)
l34 = diagram.line(v3, v4, arrow=True)
w23 = diagram.line(v2, v3, style='wiggly elliptic')
# Add labels.
l12.text("p")
w23.text("q")
l23.text("p - q")
l34.text("p")
diagram.plot()
plt.show()
# Line styles
Ph_style = dict(style='elliptic loopy', ellipse_spread=.6, xamp=.10, yamp=-.15, nloops=15)
DW_style = dict(style='circular loopy', circle_radius=.7, xamp=.10, yamp=.15, nloops=18)
G_style = dict(style='simple', arrow=True, arrow_param={'width':0.15, 'length': .3})
# Item 1
v1 = D.verticle([D.x0, D.y0])
v2 = D.verticle(v1.xy, dx=opwidth)
Sigma = D.operator([v1,v2])
Sigma.text("$\Sigma^{ep}$")
# Item 2
D.text(v2.x + objspace, D.y0, "=", fontsize=30)
# Item 3
v1 = D.verticle([v2.x + 2 * objspace, D.y0 - 0.3])
v2 = D.verticle(v1.xy, dx=linlen)
G = D.line(v1, v2, **G_style)
Ph = D.line(v1, v2, **Ph_style)
# Item 2
D.text(v2.x + objspace, D.y0, "+", fontsize=30)
# Item 3
v1 = D.verticle([v2.x + 3 * objspace, D.y0 - 0.3])
DW = D.line(v1, v1, **DW_style)
D.plot()
fig.savefig('pdf/phonons-Sigma.pdf')
"""Create the Fock interaction diagram."""
import matplotlib.pyplot as plt
from feynman import Diagram
diagram = Diagram()
v1 = diagram.verticle(xy=(.1,.5), marker='')
v2 = diagram.verticle(xy=(.3,.5))
v3 = diagram.verticle(xy=(.7,.5))
v4 = diagram.verticle(xy=(.9,.5), marker='')
l12 = diagram.line(v1, v2, arrow=True)
w23 = diagram.line(v2, v3, style='elliptic wiggly')
l23 = diagram.line(v2, v3, arrow=True)
l34 = diagram.line(v3, v4, arrow=True)
l12.text("p")
w23.text("q")
l23.text("p-q")
l34.text("p")
diagram.plot()
plt.savefig('pdf/fock.pdf')
diagram.show()
# Symbol
D.text(v13.x + txtpad, y0, "=")
# Create a three-vertex dot.
chunkdist = .03
chunklen = .03
chunkstyle = dict(arrow=False, linewidth=6.)
v20 = D.vertex([v13.x + 2 * txtpad, y0])
v210 = D.vertex(v20.xy, angle=0., radius=chunkdist, marker='')
v220 = D.vertex(v20.xy, angle=1. / 3, radius=chunkdist, marker='')
v230 = D.vertex(v20.xy, angle=2. / 3, radius=chunkdist, marker='')
v21 = D.vertex(v20.xy, angle=0., radius=chunkdist + chunklen, marker='')
v22 = D.vertex(v20.xy, angle=1. / 3, radius=chunkdist + chunklen, marker='')
v23 = D.vertex(v20.xy, angle=2. / 3, radius=chunkdist + chunklen, marker='')
D.line(v210, v21, **chunkstyle)
D.line(v220, v22, **chunkstyle)
D.line(v230, v23, **chunkstyle)
# Symbol
D.text(v20.x + txtpad, y0, "+")
# Second term
xy = [v20.x + 2 * txtpad, y0]
v31 = D.vertex(xy, dy=side / 2)
v32 = D.vertex(xy, dy=-side / 2)
v33 = D.vertex(xy, dy=side / 2, dx=side)
v34 = D.vertex(xy, dy=-side / 2, dx=side)
K = D.operator([v31, v32, v34, v33])
K.text("$\\frac{\delta \Sigma}{\delta G}$")
# Symbol
D.text(v13.x + txtpad, y0, "=")
# Create a three-vertex dot.
chunkdist = .03
chunklen = .03
chunkstyle=dict(arrow=False, linewidth=6.)
v20 = D.vertex([v13.x + 2 * txtpad, y0])
v210 = D.vertex(v20.xy, angle=0., radius=chunkdist, marker='')
v220 = D.vertex(v20.xy, angle=1./3, radius=chunkdist, marker='')
v230 = D.vertex(v20.xy, angle=2./3, radius=chunkdist, marker='')
v21 = D.vertex(v20.xy, angle=0., radius=chunkdist+chunklen, marker='')
v22 = D.vertex(v20.xy, angle=1./3, radius=chunkdist+chunklen, marker='')
v23 = D.vertex(v20.xy, angle=2./3, radius=chunkdist+chunklen, marker='')
D.line(v210, v21, **chunkstyle)
D.line(v220, v22, **chunkstyle)
D.line(v230, v23, **chunkstyle)
# Symbol
D.text(v20.x + txtpad, y0, "+")
# Second term
xy = [v20.x + 2 * txtpad, y0]
v31 = D.vertex(xy, dy= side/2)
v32 = D.vertex(xy, dy=-side/2)
v33 = D.vertex(xy, dy= side/2, dx=side)
v34 = D.vertex(xy, dy=-side/2, dx=side)
K = D.operator([v31,v32,v34,v33])
K.text("$\\frac{\delta \Sigma}{\delta G}$")
ax.set_ylim(0,.25)
# Sigma operator
D = Diagram(ax)
v11 = D.vertex([.1, .08])
v12 = D.vertex(v11.xy, dx=.15)
Sigma = D.operator([v11, v12])
Sigma.text("$\Sigma$")
# Symbols
D.text(v12.x+.1, v12.y, "=")
# GW convolution
v21 = D.vertex(v12.xy, dxy=[0.2, -0.04])
v22 = D.vertex(v21.xy, dx=0.4)
l21 = D.line(v21, v22, style='double', arrow=True)
# Specifying the number of wiggles and the amplitude of the wiggles
l22 = D.line(v21, v22, style='double wiggly elliptic', nwiggles=5.5, amplitude=0.015)
# 't' is the coordinate along the line (from 0 to 1)
l21.text("G", t=0.4, y=.025, fontsize=24)
l22.text("W", y=-.06, fontsize=24)
# Plot and show
D.plot()
plt.show()
"""Create the Fock interaction diagram."""
from feynman import Diagram
diagram = Diagram()
v1 = diagram.verticle(xy=(.1, .5), marker='')
v2 = diagram.verticle(xy=(.3, .5))
v3 = diagram.verticle(xy=(.7, .5))
v4 = diagram.verticle(xy=(.9, .5), marker='')
l12 = diagram.line(v1, v2, arrow=True)
w23 = diagram.line(v2, v3, pathtype='elliptic', linestyle='wiggly')
l23 = diagram.line(v2, v3, arrow=True)
l34 = diagram.line(v3, v4, arrow=True)
l12.text("p")
w23.text("q")
l23.text("p-q")
l34.text("p")
diagram.plot()
diagram.show()
"""Create the Fock interaction diagram."""
from feynman import Diagram
diagram = Diagram()
v1 = diagram.verticle(xy=(.1,.5), marker='')
v2 = diagram.verticle(xy=(.3,.5))
v3 = diagram.verticle(xy=(.7,.5))
v4 = diagram.verticle(xy=(.9,.5), marker='')
l12 = diagram.line(v1, v2, arrow=True)
w23 = diagram.line(v2, v3, pathtype='elliptic', linestyle='wiggly')
l23 = diagram.line(v2, v3, arrow=True)
l34 = diagram.line(v3, v4, arrow=True)
l12.text("p")
w23.text("q")
l23.text("p-q")
l34.text("p")
diagram.plot()
diagram.show()
ax = fig.add_axes([0,0,1,1], frameon=False)
diagram = Diagram(ax)
#diagram.text(.5,0.9,"Gluon-Gluon Fusion (ggF)",fontsize=40)
in1 = diagram.vertex(xy=(.05,.7), marker='')
in2= diagram.vertex(xy=(.05,.3), marker='')
v1 = diagram.vertex(xy=(.25,.7))
v2 = diagram.vertex(xy=(.25,.3))
v3 = diagram.vertex(xy=(.45,.5))
higgsout = diagram.vertex(xy=(.60,.5))
zout1 = diagram.vertex(xy=(.85,.7), marker='')
zout2 = diagram.vertex(xy=(.85,.3), marker='')
gluon_style = dict(style='linear loopy', xamp=.025, yamp=.035, nloops=4)
g1 = diagram.line(in1, v1, **gluon_style)
g2 = diagram.line(in2, v2, **gluon_style)
t1 = diagram.line(v1, v2)
t2 = diagram.line(v2, v3)
t3 = diagram.line(v3, v1)
higgs = diagram.line(v3, higgsout, arrow=False, style='dashed')
z1 = diagram.line(higgsout, zout1,arrow=False, style='wiggly')
z2 = diagram.line(zout2, higgsout,arrow=False, style='wiggly')
g1.text("$g$",fontsize=30)
g2.text("$g$",fontsize=30)
diagram.text(zout1.xy[0]+.025,zout1.xy[1],"$Z$",fontsize=30)
diagram.text(zout2.xy[0]+.025,zout2.xy[1],"$Z$",fontsize=30)
t1.text("$t$",fontsize=30)
t2.text("$t$",fontsize=30)
t3.text(r"$\bar{t}$",fontsize=30)
v03 = D.verticle(xy, dx=gammalen)
gamma0 = D.operator([v01, v02, v03])
gamma0.text("$\Gamma$")
D.text(.75, y0, "=", fontsize=30)
v30 = D.verticle([1.05, y0])
n1 = np.array([-np.sqrt(3) / 6, .5])
n2 = np.array([-np.sqrt(3) / 6, -.5])
n3 = np.array([np.sqrt(3) / 3, .0])
chunkdist = .05
v310 = D.verticle(v30.xy, dxy=n1 * chunkdist, marker='')
v320 = D.verticle(v30.xy, dxy=n2 * chunkdist, marker='')
v330 = D.verticle(v30.xy, dxy=n3 * chunkdist, marker='')
chunklen = .05
v31 = D.verticle(v310.xy, dxy=n1 * chunklen, marker='')
v32 = D.verticle(v320.xy, dxy=n2 * chunklen, marker='')
v33 = D.verticle(v330.xy, dxy=n3 * chunklen, marker='')
chunkstyle = dict(arrow=False, linewidth=6.)
D.line(v310, v31, **chunkstyle)
D.line(v320, v32, **chunkstyle)
D.line(v330, v33, **chunkstyle)
D.plot()
fig.savefig('pdf/gw-Gamma.pdf')
fig = plt.figure(figsize=(10.,10.))
ax = fig.add_axes([0,0,1,1], frameon=False)
diagram = Diagram(ax)
diagram.text(.5,0.9,"Associated Top Pair (ttH)", fontsize=40)
in1 = diagram.vertex(xy=(.1,.8), marker='')
in2= diagram.vertex(xy=(.1,.2), marker='')
v1 = diagram.vertex(xy=(.4,.7))
v2 = diagram.vertex(xy=(.4,.3))
v3 = diagram.vertex(xy=(.6,.5))
out1 = diagram.vertex(xy=(.9,.8), marker='')
out2 = diagram.vertex(xy=(.9,.2), marker='')
higgsout = diagram.vertex(xy=(.9,.5))
g1 = diagram.line(in1, v1, style='loopy',nloops=7,yamp=0.04)
g2 = diagram.line(in2, v2, style='loopy',nloops=7,yamp=0.04)
t1 = diagram.line(v3, v1, arrow = True)
t2 = diagram.line(v2, v3, arrow = True)
higgs = diagram.line(v3, higgsout, arrow=False, style='dashed')
t3 = diagram.line(v1, out1, arrow=True)
t4 = diagram.line(out2, v2, arrow=True)
g1.text("g",fontsize=30)
g2.text("g",fontsize=30)
diagram.text(v3.xy[0], v3.xy[1]+0.1, r"$\bar{\mathrm{t}}$",fontsize=35)
t2.text("t",fontsize=30)
t3.text("t",fontsize=30)
t4.text(r"$\bar{\mathrm{t}}$",fontsize=30)
higgs.text("H",fontsize=35)
arrow=True,
arrow_param={
'width': 0.15,
'length': .3
})
# Item 1
v11 = D.vertex([D.x0, D.y0])
v12 = D.vertex(v11.xy, dx=opwidth)
Sigma = D.operator([v11, v12])
Sigma.text("$\Sigma^{ep}$")
# Symbol
D.text(v12.x + txtpad, D.y0, "=")
# Item 3
v21 = D.vertex([v12.x + 2 * txtpad, D.y0 - 0.3])
v22 = D.vertex(v21.xy, dx=linlen)
G = D.line(v21, v22, **G_style)
Ph = D.line(v21, v22, **Ph_style)
# Symbol
D.text(v22.x + txtpad, D.y0, "+")
# Item 3
v31 = D.vertex([v22.x + 3 * txtpad, D.y0 - 0.3])
DW = D.line(v31, v31, **DW_style)
D.plot()
plt.show()
v30 = D.verticle(v02.xy, dx=2*obj_spacing)
n1 = np.array([-1.,0.])
n2 = np.array([ 1.,0.])
chunkdist = .03
v310 = D.verticle(v30.xy, dxy=n1*chunkdist, marker='')
v320 = D.verticle(v30.xy, dxy=n2*chunkdist, marker='')
chunklen = .025
v31 = D.verticle(v310.xy, dxy=n1*chunklen, marker='')
v32 = D.verticle(v320.xy, dxy=n2*chunklen, marker='')
chunkstyle=dict(arrow=False, linewidth=6.)
D.line(v310, v31, **chunkstyle)
D.line(v320, v32, **chunkstyle)
D.text(v30.xy[0] + obj_spacing, y0, "-", fontsize=40)
xy = [1.6, y0]
v11 = D.verticle(v30.xy, dx=2 * obj_spacing)
v12 = D.verticle(v11.xy, dx=linlen)
v13 = D.verticle(v12.xy, dx=opwidth)
D.line(v11, v12, **v_style)
O = D.operator([v12,v13], c=1.3)
O.text("$P$")
"""Create the Fock interaction diagram."""
import matplotlib.pyplot as plt
from feynman import Diagram
diagram = Diagram()
v1 = diagram.verticle(xy=(.1, .5), marker='')
v2 = diagram.verticle(xy=(.3, .5))
v3 = diagram.verticle(xy=(.7, .5))
v4 = diagram.verticle(xy=(.9, .5), marker='')
l12 = diagram.line(v1, v2, arrow=True)
w23 = diagram.line(v2, v3, style='elliptic wiggly')
l23 = diagram.line(v2, v3, arrow=True)
l34 = diagram.line(v3, v4, arrow=True)
l12.text("p")
w23.text("q")
l23.text("p-q")
l34.text("p")
diagram.plot()
plt.savefig('pdf/fock.pdf')
diagram.show()
"""
import matplotlib.pyplot as plt
from feynman import Diagram
fig = plt.figure(figsize=(10, 5))
ax1 = fig.add_subplot(121, frameon=False)
diagram = Diagram(ax1)
diagram.text(.5, 0.9, "Charged-Current", fontsize=25)
in1 = diagram.vertex(xy=(0.05, 0.75), marker='')
in2 = diagram.vertex(xy=(0.05, 0.25), marker='')
v1 = diagram.vertex(xy=(.45, .6))
v2 = diagram.vertex(xy=(.45, .4))
out1 = diagram.vertex(xy=(0.85, 0.75), marker='')
out2 = diagram.vertex(xy=(0.85, 0.25), marker='')
nu1 = diagram.line(in1, v1) #incoming neutrino
N = diagram.line(in2, v2) #incoming neucleon
W = diagram.line(v1, v2, style='wiggly') #W mediator
nu2 = diagram.line(v1, out1) #outgoing neutrino
X = diagram.line(v2, out2) #outgoing shower
diagram.text(0.10, 0.68, "$\\nu_{\ell}$", fontsize=30)
diagram.text(0.10, 0.32, "$N$", fontsize=30)
diagram.text(0.57, 0.5, "$W^{\pm}$", fontsize=30)
diagram.text(0.81, 0.68, "$\ell$", fontsize=30)
diagram.text(0.81, 0.32, "$X$", fontsize=30)
ax2 = fig.add_subplot(122, frameon=False)
diagram2 = Diagram(ax2)
diagram2.text(.5, 0.9, "Neutral-Current", fontsize=25)
in1 = diagram2.vertex(xy=(0.05, 0.75), marker='')
in2 = diagram2.vertex(xy=(0.05, 0.25), marker='')
n1 = np.array([-np.sqrt(3)/6, .5])
n2 = np.array([-np.sqrt(3)/6,-.5])
n3 = np.array([ np.sqrt(3)/3, .0])
chunkdist = .05
v310 = D.verticle(v30.xy, dxy=n1*chunkdist, marker='')
v320 = D.verticle(v30.xy, dxy=n2*chunkdist, marker='')
v330 = D.verticle(v30.xy, dxy=n3*chunkdist, marker='')
chunklen = .05
v31 = D.verticle(v310.xy, dxy=n1*chunklen, marker='')
v32 = D.verticle(v320.xy, dxy=n2*chunklen, marker='')
v33 = D.verticle(v330.xy, dxy=n3*chunklen, marker='')
chunkstyle=dict(arrow=False, linewidth=6.)
D.line(v310, v31, **chunkstyle)
D.line(v320, v32, **chunkstyle)
D.line(v330, v33, **chunkstyle)
D.text(1.4, y0, "+", fontsize=30)
xy = [1.6, y0]
v11 = D.verticle(xy, dy= side/2)
v12 = D.verticle(xy, dy=-side/2)
v13 = D.verticle(xy, dy= side/2, dx=side)
v14 = D.verticle(xy, dy=-side/2, dx=side)
K = D.operator([v11,v12,v14,v13])
K.text("$\\frac{\delta \Sigma}{\delta G}$")
v21 = D.verticle(v13.xy, dx=linlen)
import matplotlib.pyplot as plt
from feynman import Diagram
fig = plt.figure(figsize=(10.,10.))
ax = fig.add_axes([0,0,1,1], frameon=False)
diagram = Diagram(ax)
diagram.text(.4,0.9,"Associated Vector Boson", fontsize=40)
diagram.text(.6,0.83,"(VH or 'Higgs Strahlung')", fontsize=40)
in1 = diagram.vertex(xy=(.1,.75), marker='')
in2= diagram.vertex(xy=(.1,.25), marker='')
v1 = diagram.vertex(xy=(.35,.5))
v2 = diagram.vertex(xy=(.65,.5))
higgsout = diagram.vertex(xy=(.9,.75))
out1 = diagram.vertex(xy=(.9,.25),marker='')
q1 = diagram.line(in1, v1)
q2 = diagram.line(v1, in2)
wz1 = diagram.line(v1, v2, style='wiggly')
wz2 = diagram.line(v2, out1, style='wiggly')
higgs = diagram.line(v2, higgsout, arrow=False, style='dashed')
q1.text("q",fontsize=30)
q2.text(r"$\bar{\mathrm{q}}$",fontsize=30)
diagram.text(0.5,0.55,"$Z/W^\pm$",fontsize=30)
diagram.text(0.69,0.35,"$Z/W^\pm$",fontsize=30)
higgs.text("H",fontsize=30)
diagram.plot()
plt.show()
opwidth = 0.3
linlen = 0.4
W_style = dict(style='double wiggly', nwiggles=2)
v_style = dict(style='simple wiggly', nwiggles=2)
# First diagram
D1 = Diagram(ax)
xy = [0.2, y0]
v01 = D1.verticle(xy)
xy[0] += linlen
v02 = D1.verticle(v01.xy, dx=linlen)
W = D1.line(v01, v02, **W_style)
text_prop = dict(y=0.06, fontsize=22)
W.text("$W$", **text_prop)
D1.text(.75, y0, "=", fontsize=30)
xy = [0.9, y0]
v11 = D1.verticle(xy)
v13 = D1.verticle(v11.xy, dx=opwidth)
v14 = D1.verticle(v13.xy, dx=linlen)
O = D1.operator([v11, v13], c=1.1)
O.text("${\\varepsilon^{-1}}$", x=.0, y=.01, fontsize=35)
D1.line(v13, v14, **v_style)
ax = fig.add_axes([0,0,1,1], frameon=False)
diagram = Diagram(ax)
#diagram.text(.5,0.9,r"Vector Boson Fusion (VBF) Higgs $\rightarrow\tau\tau$",fontsize=40)
in1 = diagram.vertex(xy=(.1,.8), marker='')
in2= diagram.vertex(xy=(.1,.2), marker='')
v1 = diagram.vertex(xy=(.3,.7))
v2 = diagram.vertex(xy=(.3,.3))
v3 = diagram.vertex(xy=(.5,.5))
out1 = diagram.vertex(xy=(.9,.8), marker='')
out2 = diagram.vertex(xy=(.9,.2), marker='')
higgsf = diagram.vertex(xy=(.7,.5))
tau1 = diagram.vertex(xy=(.9,.7), marker='')
tau2 = diagram.vertex(xy=(.9,.3), marker='')
q1 = diagram.line(in1, v1, arrow=False)
q2 = diagram.line(in2, v2, arrow=False)
wz1 = diagram.line(v1, v3, style='wiggly')
wz2 = diagram.line(v2, v3, style='wiggly')
higgs = diagram.line(v3, higgsf, style='dashed', arrow=False)
q3 = diagram.line(v1, out1, arrow=False)
q4 = diagram.line(v2, out2, arrow=False)
t1 = diagram.line(higgsf, tau1)
t2 = diagram.line(tau2, higgsf)
q1.text("$q_1$",fontsize=30)
q2.text("$q_2$",fontsize=30)
diagram.text(v3.xy[0], v3.xy[1]+0.11, "$Z/W^\pm$",fontsize=30)
wz2.text("$Z/W^\pm$",fontsize=30)
q3.text("$q_3$",fontsize=30)
q4.text("$q_4$",fontsize=30)
opwidth = 0.3
linlen = 0.8
tail_marker = 'o'
Gamma_width = .3
W_style = dict(style='double wiggly', nwiggles=4)
G_style = dict(style='double elliptic',
ellipse_excentricity=-1.2, ellipse_spread=.3,
arrow=True, arrow_param={'width':0.05})
D = Diagram(ax)
xy = [0.2, y0]
v01 = D.verticle(xy)
v02 = D.verticle(v01.xy, dx=opwidth)
P = D.operator([v01,v02], c=1.3)
P.text("$P$")
D.text(.70, y0, "=", fontsize=30)
xy[0] = 0.9
v21 = D.verticle(xy)
v22 = D.verticle(xy, dx=linlen)
l21 = D.line(v22, v21, **G_style)
l21 = D.line(v21, v22, **G_style)
D.plot()
fig.savefig('pdf/gw-P.pdf')
y0 = sum(ax.get_ylim()) / 2
# Initialize diagram with the ax
D = Diagram(ax)
# Polarizability operator
v11 = D.vertex([0.1, y0])
v12 = D.vertex(v11.xy, dx=0.15)
P = D.operator([v11, v12], c=1.3) # c is the excentricity of the patch
P.text("$P$")
# Symbols
D.text(.35, y0, "=", fontsize=30)
# Propagator lines
G_style = dict(style='double elliptic',
ellipse_excentricity=-1.2,
ellipse_spread=.3,
arrow=True,
arrow_param={'width': 0.03})
v21 = D.vertex([0.45, y0])
v22 = D.vertex(v21.xy, dx=0.4)
G1 = D.line(v22, v21, **G_style)
G2 = D.line(v21, v22, **G_style)
# Plot and show
D.plot()
plt.show()
import matplotlib
from feynman import Diagram
fig = matplotlib.pyplot.figure(figsize=(1., 1.))
ax = fig.add_axes([0, 0, 10, 10], frameon=False)
diagram = Diagram(ax)
in1 = diagram.verticle(xy=(.1, .5))
in2 = diagram.verticle(xy=(.4, .5))
v1 = diagram.verticle(xy=(.65, .65))
v2 = diagram.verticle(xy=(.65, .35))
out1 = diagram.verticle(xy=(.9, .65), marker='')
out2 = diagram.verticle(xy=(.9, .35), marker='')
higgs = diagram.line(in1, in2, arrow=False, style='dashed')
nu1 = diagram.line(v1, in2)
nu2 = diagram.line(in2, v2)
w = diagram.line(v1, v2, style='wiggly')
lep = diagram.line(out1, v1)
tau = diagram.line(v2, out2)
nu1.text(r"$\nu_\ell$", fontsize=40)
nu2.text(r"$\nu_\tau$", fontsize=40)
lep.text(r"$\ell^+$", fontsize=40)
tau.text(r"$\tau^-$", fontsize=40)
#w.text(r"W$^\pm$",fontsize=40)
diagram.text(0.72, 0.5, "$W^\pm$", fontsize=40)
#diagram.text(0.69,0.35,"$Z/W^\pm$",fontsize=30)
higgs.text("H", fontsize=40)
"""
import matplotlib.pyplot as plt
from feynman import Diagram
# If no Axes is given, a new one is initialized.
diagram = Diagram()
# Create four vertices.
v1 = diagram.vertex(xy=(.1,.5), marker='')
v2 = diagram.vertex(v1.xy, dx=.2)
v3 = diagram.vertex(v2.xy, dx=.4)
v4 = diagram.vertex(v3.xy, dx=.2, marker='')
# Create four lines.
# By default, 'simple' lines have arrows
# and others flavours such as 'wiggly' or 'loopy' don't.
l12 = diagram.line(v1, v2)
l23 = diagram.line(v2, v3)
l34 = diagram.line(v3, v4, arrow=True)
w23 = diagram.line(v2, v3, style='wiggly elliptic')
# Add labels.
l12.text("p")
w23.text("q")
l23.text("p - q")
l34.text("p")
diagram.plot()
plt.show()
