New strategies for New Physics search in B -> K* nu anti-nu, B -> K nu anti-nu and B -> X(s) nu anti-nu decays

Abstract

The rare decay B -> K* nu anti-nu allows a transparent study of Z penguin and other electroweak penguin effects in New Physics (NP) scenarios in the absence of dipole operator contributions and Higgs (scalar) penguin contributions that are often more important than Z contributions in B -> K* l+l- and B(s) -> l+l- decays. We present a new analysis of B -> K* nu anti-nu with improved form factors and of the decays B -> K nu anti-nu and B -> X(s) nu anti-nu in the SM and in a number of NP scenarios like the general MSSM, general scenarios with modified Z/Z' penguins and in a singlet scalar extension of the SM. We also summarize the results in the Littlest Higgs model with T-parity and a Randall-Sundrum (RS) model with custodial protection of left-handed Z-di-dj couplings. Our SM prediction BR(B -> K* nu anti-nu)=(6.8^+1.0_-1.1) x 10^-6 turns out to be significantly lower than the ones present in the literature. Our improved calculation BR(B -> X(s) nu anti-nu)=(2.7+-0.2) x 10^-5 in the SM avoids the normalization to the BR(B -> X(c) e anti-nu(e)) and, with less than 10% total uncertainty, is the most accurate to date. The results for the SM and NP scenarios can be transparently summarized in a (epsilon,eta) plane with a non-vanishing eta signalling the presence of new right-handed down-quark flavour violating couplings which can be ideally probed by the decays in question. Measuring the three branching ratios and one additional polarization observable in B -> K* nu anti-nu allows to overconstrain the resulting point in the (epsilon,eta) plane with (epsilon,eta)=(1,0) corresponding to the SM. The correlations of these three channels with the rare decays K+ -> pi+ nu anti-nu, KL -> pi0 nu anti-nu, B -> X(s) l+ l- and B(s) -> mu+ mu- offer powerful tests of New Physics with new right-handed couplings and non-MFV interactions.

31 pages, 14 figures, 3 tables. v2: 9 references, minor clarifications and corrections added. Conclusions unchanged

References in corpus (11)

• B->V gamma Beyond QCD Factorisation
• Rare K and B Decays in a Warped Extra Dimension with Custodial Protection
• Improved estimates of rare K decay matrix-elements from Kl3 decays
• New observables in the decay mode anti-B --> anti-K*0 l+ l-
• Constraints on New Physics in MFV models: a model-independent analysis of Delta F=1 processes
• Probing New Physics through B Mixing: Status, Benchmarks and Prospects
• Electroweak Corrections to the Charm Quark Contribution to K+ -> pi+ nu nu-bar
• B \to K(K^*) missing energy in Unparticle physics
• Normalizing inclusive rare B decays
• b\to sν\barν decay in the MSSM: Implication of b\to sγat large tan beta
• B\to X_sγ, X_s l^+ l^- decays and constraints on the mass insertion parameters in the MSSM

Cited by in corpus (7)

• Patterns of Flavour Violation in the Presence of a Fourth Generation of Quarks and Leptons
• Search for the Rare Decay B->K nu nubar
• Tree-level contributions to the rare decays B+ --> pi+ nu anti-nu, B+ --> K+ nu anti-nu, and B+ --> K*+ nu anti-nu in the Standard Model
• Rare meson decays into very light neutralinos
• Rare $B_s$ decays to $\eta$ and ${\eta }^{\prime }$ final states
• Precision flavour physics with $B\to K\nu \bar{\nu }$ and $B\to K{l}^{+}{l}^{-}$
• The SuperB Physics Programme