Implication of possible observation of enhanced Bd0 --> mu+ mu- decay

Abstract

The very rare Bd0 --> mu+ mu- decay may be the last chance for New Physics in flavor sector at the LHC, before the 13 TeV run in 2015. Partially motivated by the known tension in sin(2beta/phi_1), enhancement beyond (3-4) x 10^-10 would likely imply the effect of a fourth generation of quarks. If observed at this level, the 126 GeV boson may not be the actual Higgs boson, while the b --> d quadrangle (modulo m_t') would jump out. The 2011-2012 data is likely not sensitive to values below 3 x 10^-10, and the mode should continue to be pursued with the 13 TeV run.

6 pages, 9 figures; title changed, references added and updated, other minor improvements, to appear in PRD

References in corpus (15)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• First evidence for the decay Bs -> mu+ mu-
• Correlations among new CP violating effects in Delta F = 2 observables
• Possible Indications of New Physics in Bd-mixing and in sin(2 beta) Determinations
• Impact of a Higgs boson at a mass of 126 GeV on the standard model with three and four fermion generations
• Search for heavy bottom-like quarks in 4.9 inverse femtobarns of pp collisions at sqrt(s) = 7 TeV
• Large Time-dependent CP Violation in B_s^0 System and Finite D^0-D^0bar Mass Difference in Four Generation Standard Mode
• Patterns of Flavour Violation in the Presence of a Fourth Generation of Quarks and Leptons
• Holographic techni-dilaton at 125 GeV
• Search for pair produced fourth-generation up-type quarks in pp collisions at sqrt(s) = 7 TeV with a lepton in the final state
• Search for pair production of heavy top-like quarks decaying to a high-pT W boson and a b quark in the lepton plus jets final state at sqrt(s)=7 TeV with the ATLAS detector
• First observation of the decay $B^{+}\to {\pi }^{+}{\mu }^{+}{\mu }^{-}$
• Combined search for the quarks of a sequential fourth generation
• Search for heavy quarks decaying into a top quark and a W or Z boson using lepton + jets events in pp collisions at sqrt(s) = 7 TeV

Cited by in corpus (8)

• Neutrino cosmology and Planck
• Phenomenology of semileptonic B-meson decays with form factors from lattice QCD
• $B\to \pi \ell \ell$ form factors for new-physics searches from lattice QCD
• Rates and Asymmetries of B --> pi l+ l- Decays
• Flavor Physics and CP Violation
• Correlating $B_q^0\to {\mu }^{+}{\mu }^{-}$ and $K_L\to {\pi }^0\nu \bar{\nu }$ Decays with Four Generations
• Enhancement of Br(B_d -> mu^+mu^-)/Br(B_s -> mu^+mu^-) in Supersymmetric Unified Models
• Probing Sterile Neutrino via Lepton Flavor Violating Decays of Mesons