Couplings of new Higgs scalars and CP- invariance

In summary, the conversation discusses A. Djouadi's review for Higgs, volume II, which discusses the couplings of SUSY new scalars with gauge bosons. The points that are not understood are: CP-invariance forbids WWA, ZZA, and WZH± couplings, and for the couplings between two Higgs bosons and one gauge boson, CP-invariance implies that the two Higgs bosons must have opposite parity, resulting in no Zhh, ZHh, ZHH, and ZAA couplings. Additionally, for the trilinear Higgs couplings, there are no "AAA" or "Ahh" couplings, while there are "hhh" and "
  • #1
Safinaz
260
8
Hi all,

In A. Djouadi's review for Higgs, volume II, " arXiv:hep-ph/0503173v2 ", Sec. 1.2.3, it discuss the couplings of SUSY new scalars with gauge bosons, there are some points I don't understand:

- CP–invariance forbids WWA, ZZA and W ZH ± couplings

- For the couplings between two Higgs bosons and one gauge boson, CP–invariance im-
plies that the two Higgs bosons must have opposite parity and, thus, there are no Zhh, ZHh,
ZHH and ZAA coupling

Also regarding the trilinear Higgs couplings, Eq. (1.100), there are no " A A A " , or " A hh ", why is that? While there are hhh, or h A A ..Bests.
 
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  • #2
Hay guys, any help ..
 

FAQ: Couplings of new Higgs scalars and CP- invariance

1. What are Higgs scalars?

Higgs scalars are scalar particles predicted by the Standard Model of particle physics. They are responsible for giving mass to other particles through the mechanism of electroweak symmetry breaking.

2. What is CP-invariance?

CP-invariance, also known as charge-parity invariance, is a fundamental principle in particle physics that states that the laws of physics should remain the same if a particle is replaced by its antiparticle and its spatial coordinates are inverted.

3. How do new Higgs scalars affect CP-invariance?

New Higgs scalars can introduce violations to CP-invariance, which can manifest in the form of asymmetry between matter and antimatter or in the interactions between particles and antiparticles.

4. What are couplings in relation to Higgs scalars and CP-invariance?

Couplings refer to the strength of the interactions between particles and new Higgs scalars. In the context of CP-invariance, the couplings of new Higgs scalars can determine the extent of any CP-violating effects.

5. How do scientists study couplings of new Higgs scalars and CP-invariance?

Scientists can study these couplings through experiments at particle accelerators, such as the Large Hadron Collider, where they can observe the interactions between particles and new Higgs scalars and measure the strengths of these interactions. Theoretical calculations and models are also used to investigate the effects of these couplings on CP-invariance.

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