In pursuit of new physics withBsdecays

2000/12/31 by Isard Dunietz, Robert Fleischer, Ulrich Nierste · 19 citations
Mathematics · Physics and Astronomy · #Algorithm #Combinatorics #Mathematics #Neutrino Physics Research #Particle physics #Particle physics theoretical and experimental studies #Phase (matter) #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ph

paper · pdf · doi:10.1103/physrevd.63.114015

published as Phys.Rev.D63:114015,2001 · minor changes, lattice prediction of Delta Gamma updated, appears in PRD

arxiv created 2001/03/06 · openalex publication_date 2001/05/02 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The presence of a sizable CP-violating phase in B_s\ensuremath-B_s mixing would be an unambiguous signal of physics beyond the standard model. We analyze various possibilities to detect such a new phase considering both tagged and untagged decays. The effects of a sizable width difference \ensuremathΔ\ensuremathΓ between the B_s mass eigenstates, on which the untagged analyses rely, are included in all formulas. A novel method to find this phase from simple measurements of lifetimes and branching ratios in untagged decays is proposed. This method does not involve two-exponential fits, which require much larger statistics. For the tagged decays, an outstanding role is played by the observables of the time-dependent angular distribution of the B_s\ensuremath→J/\ensuremathψ\stackrel\ensuremath→[l⁺l^\ensuremath-]\ensuremathφ\stackrel\ensuremath→[K⁺K^\ensuremath-] decay products. We list the formulas needed for the angular analysis in the presence of both a new CP-violating phase and a sizable \ensuremathΔ\ensuremathΓ, and propose methods to remove a remaining discrete ambiguity in the new phase. This phase can therefore be determined in an unambiguous way.

Citations

• Bs-B¯smixing,CPviolation, and extraction of CKM phases from untaggedBsdata samples
• QCD factorization for exclusive non-leptonic B-meson decays: general arguments and the case of heavy–light final states
• Bd0(t)→DPP time-dependent Dalitz plots, CP-violating angles 2β, 2β+γ, and discrete ambiguities
• Review of Particle Physics
• Review of Particle Physics

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• Bs0–B¯s0 mixing in leptophobic Z′ model
• Search for the rare decaysB+→μ+μ−K+,B0→μ+μ−K*(892)0, andBs0→μ+μ−ϕat CDF
• Measurement of theBs0Production Cross Section withBs0→J/ψϕDecays inppCollisions ats=7 TeV
• Implications of LHCb measurements and future prospects
• Can the CP asymmetries in B→ψKS and B→ψKL differ?
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• Rare semileptonicB→K*ℓ+ℓ−decays in theRScmodel
• Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set
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• Constraining the Phase ofBs−B¯sMixing
• Measurement of the CP -violating phaseϕsinB¯s0→J/ψπ+π−decays
• Testing the new CP phase in a supersymmetric model with Q6 family symmetry by Bs mixing
• First Observation ofBs0→J/ψηandBs0→J/ψη′
• Anatomy of prominent B and K decays and signatures of CP-violating new physics in the electroweak penguin sector