B physics signals of the lightest CP odd Higgs in the NMSSM at large tan beta

Hiller, Gudrun

doi:10.1103/PhysRevD.70.034018

B physics signals of the lightest CP odd Higgs in the NMSSM at large tan beta

Gudrun Hiller
(
- Munich U.
)

Apr, 2004

19 pages

Published in:

Phys.Rev.D 70 (2004) 034018

e-Print:

hep-ph/0404220 [hep-ph]

DOI:

10.1103/PhysRevD.70.034018

Report number:

LMU-04-04

View in:

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Abstract:

We investigate the low energy phenomenology of the lighter pseudoscalar

A_1^0

in the NMSSM. The

A_1^0

mass can naturally be small due to a global

U(1)_R

symmetry of the Higgs potential, which is only broken by trilinear soft terms. The

A_1^0

mass is further protected from renormalization group effects in the large

\tan \beta

limit. We calculate the

b \to s A_1^0

amplitude at leading order in

\tan \beta

and work out the contributions to rare

K

,

B

and radiative

\Upsilon

-decays and

B -\bar B

mixing. We obtain constraints on the

A_1^0

mass and couplings and show that masses down to

{\cal{O}}(10)

MeV are allowed. The

b

-physics phenomenology of the NMSSM differs from the MSSM in the appearance of sizeable renormalization effects from neutral Higgses to the photon and gluon dipole operators and the breakdown of the MSSM correlation between the

B_s \to \mu^+ \mu^-

branching ratio and

B_s - \bar B_s

mixing. For

A_1^0

masses above the tau threshold the

A_1^0

can be searched for in

b \to s \tau^+ \tau^-

processes with branching ratios \lsim 10^{-3}.

Note:

18 pages, 3 figures: references added Report-no: LMU 04/04

13.20.He
14.80.Cp
13.90.+i
supersymmetry
Higgs particle: pseudoscalar
Higgs particle: mass
bottom
bottom: decay
K: rare decay
B: rare decay

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