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Higgs decay to W + W - and llll on NCStandard Model Sedigheh Tizchang Isfahan University of Technology 20 th IPM Physics Spring Conference May 22-23, 2013

Higgs decay to W W llll on NCStandard Model - …particles.ipm.ir/conferences/2013/20thspring/Note/Tizchang.pdf · llll on NCStandard Model ... Feynman Diagram for H llll 13 9 NC

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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

Motivation

Much of theoretical physics is based on length

scales,

3

?

p LHCl l l

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

Higgs decay in SM

7

Higgs decay

f

8

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

Higgs & Yukawa Sector of

NCSM

10

NC Feynman Rules for Higgs

11

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

Feynman Diagram for

H llll

13

9NC

GeV

Conclusion

• There are new feynman Rules for Higgs sector in NCSM

• Higgs decay channels from new vertices are negligible

• Higgs decay to four lepton in NCSM is negligible.

• NC order for Higgs decay to W+W- is

Thank you 14

60NC

GeV