Higgs decay to W+W- and
llll on NCStandard Model
Sedigheh Tizchang Isfahan University of Technology
20th IPM Physics Spring Conference
May 22-23, 2013
Outlines
• Motivation
• NC SpaceTime
• Standard Model
• Higgs decay channels in SM
• NCSM
• H decay to W+W- and four lepton in NCSpacetime
• Conclution
2
NC SpaceTime
• Spacetime quantization requires to promote spacetime
coordinates to hermitean operators which do not
commute:
• is real and antisymmetric matrix.
• If constant above commentator shows
Heisenberg algebra
2
1ˆ ˆ[ , ]i j ij
NC
x x i
ij
ij
1
2
i j ijx x
4
Standard model
The standard model consists
of three elements:
• Leptons and quarks are
the basic constituents of
matter;
• The interactions are
mediated by gauge fields;
• The masses are generated
by the Higgs mechanism.
5
6
What does Higgs theory
imply?
Higgs mechanism gives mass to
W and Z bosons, and to the
matter particles.
It also predicts one
extra particle:The
Higgs boson
NC-Standard Model
Seiberg-Witten Maps
9
NCSM fermions gauge Higgs YukawaS S S S S
( )* ( ) ( )exp( ) ( )2
if x g x f x g x
4 4 4( * )( ) ( * )( ) ( ) ( )d x f g x d x f g x d x f x g x
H W+W-
12
2 2
2 22 2 4 2 2 0( ) ( )[2 ( ) ]
4 2
iH H H
W W W
M M MM M M M
v
20 2 4
3
2 4 2 22
2( ) (3 )
8 4 4
i
H H
NC W W H W
M MM M M M
v
60NC
GeV