New constraints on a light CP-odd Higgs boson and related NMSSM Ideal Higgs Scenarios

Abstract

Recent BaBar limits on $\br(Υ(3S)\to \gam a\to \gam τ^+τ^-)$ and $\br(Υ(3S)\to \gam a\to \gam μ^+μ^-)$ provide increased constraints on the $a b\anti b$ coupling of a CP-odd Higgs boson, $a$, with $m_a<M_{{\rm Y}(3S)}$. We extract these limits from the BaBar data and compare to the limits previously obtained using other data sets, especially the CLEO-III $\br(Υ(1S)\to \gam\toτ^+τ^-)$ limits. Comparisons are made to predictions in the context of "ideal"-Higgs NMSSM scenarios, in which the lightest CP-even Higgs boson, $h_1$, can have mass below $105\gev$ (as preferred by precision electroweak data) and yet can escape old LEP limits by virtue of decays to a pair of the lightest CP-odd Higgs bosons, $h_1\to a_1{a}_1$, with $m_{a_1}<2m_B$. Most such scenarios with $m_{a_1}<2m_{\tau }$ are eliminated, but the bulk of the $m_{a_1}>7.5\gev$ scenarios, which are theoretically the most favored, survive. We also outline the impact of the new ALEPH LEP results in the $\epem\to Z+4τ$ channel. For $\tan \beta \ge 3$, only NMSSM ideal Higgs scenarios with $m_{h_1}\gsim 98\gev$ and $m_{a_1}$ close to $2m_B$ satisfy the ALEPH limits. For $\tanβ\lsim 2$, the ALEPH limits are easily satisfied for the most theoretically preferred NMSSM scenarios, which are those with $m_{a_1}$ close to $2m_B$ and $m_{h_1}\sim 90\gev-100\gev$.

24 pages, 25 figures, paper updated to incorporate final ALEPH limits in Z+4τchannel.

References in corpus (12)

• Nonstandard Higgs Boson Decays
• The NMSSM Close to the R-symmetry Limit and Naturalness in $h\to aa$ Decays for $m_a<2\mb$
• Probing NMSSM Scenarios with Minimal Fine-Tuning by Searching for Decays of the Upsilon to a Light CP-Odd Higgs Boson
• The NMSSM Solution to the Fine-Tuning Problem, Precision Electroweak Constraints and the Largest LEP Higgs Event Excess
• Reinstating the 'no-lose' theorem for NMSSM Higgs discovery at the LHC
• Hunting a light CP-odd non-standard Higgs boson through its tauonic decay at a (Super) B factory
• Discovering the Higgs with Low Mass Muon Pairs
• Radiative Upsilon decays and a light pseudoscalar Higgs in the NMSSM
• Many Light Higgs Bosons in the NMSSM
• A light CP-odd Higgs boson and the muon anomalous magnetic moment
• A light non-standard Higgs boson: to be or not to be at a (Super) B factory?
• Search for narrow resonances lighter than ${\rm Y}$ mesons

Cited by in corpus (20)

• A taste of dark matter: Flavour constraints on pseudoscalar mediators
• Search for a light pseudoscalar Higgs boson in the dimuon decay channel in pp collisions at sqrt(s) = 7 TeV
• Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S)
• Probing the $\mu \nu$SSM with light scalars, pseudoscalars and neutralinos from the decay of a SM-like Higgs boson at the LHC
• Updated constraints from radiative ${\rm Y}$ decays on a light CP-odd Higgs
• CoGeNT, DAMA, and Neutralino Dark Matter in the Next-To-Minimal Supersymmetric Standard Model
• Rare Z-decay into light CP-odd Higgs bosons: a comparative study in different new physics models
• Detecting multimuon jets from the Higgs exotic decays in the Higgs portal framework
• Search for a $CP$-odd light Higgs boson in $J/\psi \to \gamma A^0$
• A possible connection between neutrino mass generation and the lightness of a NMSSM pseudoscalar
• Hunting physics beyond the standard model with unusual $W^{\pm }$ and $Z$ decays
• Search for a light Higgs resonance in radiative decays of the Y(1S) with a charm tag
• Status of sub-GeV Hidden Particle Searches
• Double-charming Higgs identification using machine-learning assisted jet shapes
• Constraints on dark forces from the B factories and low-energy experiments
• Experimental review of the ${\rm Y}(1S,2S,3S)$ physics at $e^{+}{e}^{-}$ colliders and the LHC
• Search for a light Higgs boson in single-photon decays of ${\rm Y}(1S)$ using ${\rm Y}(2S)\to {\pi }^{+}{\pi }^{-}{\rm Y}(1S)$ tagging method
• Model-independent search for pair production of new bosons decaying into muons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Low mass New Physics search for a CP-odd Higgs boson $A^0$ deacying to $s\bar{s}$ or gluon gluon at BaBar
• The Next-to-Minimal Supersymmetric Standard Model: an overview