Relating B_s Mixing and B_s -&gt; mu+mu- with New Physics

Golowich, Eugene; Hewett, JoAnne; Pakvasa, Sandip; Petrov, Alexey A; Yeghiyan, Gagik K

doi:10.48550/arxiv.1102.0009

Cited by 9 publications

(16 citation statements)

References 55 publications

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“…In this analysis we will consider also the compatibility with the (g − 2) µ data. 31), (36), and (45). The red error bars displayed are the corresponding 3 σ SM uncertainties (called ∆ theo ).…”

Section: Numerical Resultsmentioning

confidence: 99%

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Updated constraints on general squark flavor mixing

Arana-Catania¹,

Heinemeyer²,

Herrero³

2014

Phys. Rev. D

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We explore the phenomenological implications on nonminimal flavor violating (NMFV) processes from squark flavor mixing within the minimal supersymmetric standard model (MSSM). We work under the model-independent hypothesis of general flavor mixing in the squark sector, being parametrized by a complete set of dimensionless δ AB ij (A; B ¼ L; R; i; j ¼ u; c; t or d; s; b; i ≠ j) parameters. The present upper bounds on the most relevant NMFV processes, together with the requirement of compatibility in the choice of the MSSM parameters with the recent LHC and ðg − 2Þ μ data, lead to updated constraints on all squark flavor mixing parameters.

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Section: Numerical Resultsmentioning

confidence: 99%

“…The experimental result [43] and the SM prediction (using the NLO expression of [44] and the error estimate of [45]) used to obtain our updated bounds on the NMFV parameters are given by: ∆M Bs exp = (116.4 ± 0.5) × 10 −10 MeV ,…”

Section: ∆M B Smentioning

confidence: 99%

Updated constraints on general squark flavor mixing

Arana-Catania¹,

Heinemeyer²,

Herrero³

2014

Phys. Rev. D

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“…In particular, in supersymmetric extensions of the SM (SUSY), its decay amplitude receives an enhancement by a factor of order tan 3 β [1][2][3], where tan β is the ratio of vacuum expectation values of the two Higgs fields, and the branching fraction can be larger than in the SM by one order of magnitude, or more. The sensitivity of BR(B s → µ + µ − ) has been discussed extensively in the literature in the past years, mostly in constrained versions of the Minimal Supersymmetric Standard Model (MSSM) [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] and, more recently, in the phenomenological MSSM (pMSSM) [22][23][24]. The recent observation of the decay with the determination of its branching fraction by the LHCb experiment to a value very close to the SM prediction [25] excludes very large deviations, motivating a review of its implications on the viability of SUSY.…”

Section: Introductionmentioning

confidence: 99%

Supersymmetry confronts Bs -> mu+mu-: Present and future status

Arbey,

Battaglia,

Mahmoudi

et al. 2012

Preprint

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The purely leptonic rare decay B s → µ + µ − is very sensitive to supersymmetric contributions which are free from the helicity suppression of its Standard Model diagrams. The recent observation of the decay by the LHCb experiment and the first determination of its branching fraction motivate a review of their impact on the viable parameter space of supersymmetry. In this paper we discuss the implications of the present and expected future accuracy on BR(B s → µ + µ − ) for constrained and unconstrained MSSM scenarios, in relation to the results from direct SUSY searches and the Higgs data at the LHC. While the constraints from BR(B s → µ + µ − ) can be very important in specific SUSY regions, we show that the current result, and even foreseen future improvements in its accuracy, will leave a major fraction of the SUSY parameter space, compatible with the results of direct searches, unconstrained. We also highlight the complementarity of the B s → µ + µ − decay with direct SUSY searches.

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“…With knowledge of the relevant operators and their associated Wilson coefficients we can calculate the branching ratio BR(M 0 → + − ) for the different mesons [25,26]…”

Section: Meson Decaysmentioning

confidence: 99%

Purely flavor-changing Z ′ bosons and where they might hide

Foldenauer

Jaeckel

2017

J. High Energ. Phys.

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A plethora of ultraviolet completions of the Standard Model have extra U(1) gauge symmetries. In general, the associated massive Z gauge boson can mediate flavorchanging neutral current processes at tree level. We consider a situation where the Z boson couples solely via flavor-changing interactions to quarks and leptons. In this scenario the model parameter space is, in general, quite well constrained by existing flavor bounds. However, we argue that cancellation effects shelter islands in parameter space from strong flavor constraints and that these can be probed by multipurpose collider experiments like ATLAS or CMS as well as LHCb in upcoming runs at the LHC. In still allowed regions of parameter space these scenarios may help to explain the current tension between theory and experiment of (g − 2) µ as well as a small anomaly in τ decays.

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Relating B_s Mixing and B_s -> mu+mu- with New Physics

Cited by 9 publications

References 55 publications

Updated constraints on general squark flavor mixing

Updated constraints on general squark flavor mixing

Supersymmetry confronts Bs -> mu+mu-: Present and future status

Purely flavor-changing Z ′ bosons and where they might hide

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