Measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:mn>892</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:mi>γ</mml:mi></mml:math>Branching Fractions and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>and Isospin Asymmetries

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doi:10.1103/physrevlett.103.211802

Cited by 37 publications

(26 citation statements)

References 21 publications

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“…The recent update of BaBar collaboration [37] with a five times larger sample than their previous result has moved substantially A I in the positive direction (A I = 0.066 ± 0.021 ± 0.022), being now consistent with zero at more than 2 σ, while previously the consistency was below 1 σ. The older result from the Belle collaboration [38]: A I = 0.012 ± 0.044 ± 0.026 requires an update to determine whether it follows the same trend as BaBar.…”

Section: Class-i Observablesmentioning

confidence: 66%

Exploring new physics in the C 7-C 7′ plane

Descotes-Genon

Ghosh

Matias

et al. 2011

J. High Energ. Phys.

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Abstract:The Wilson coefficient C 7 governing the radiative electromagnetic decays of B meson has been calculated to a very high accuracy in the Standard Model, but experimental bounds on either the magnitude or the sign of C 7 are often model-dependent. In the present paper, we attempt at constraining both the magnitude and sign of C 7 using a systematic approach. We consider already measured observables like the branching ratios of B → X s µ + µ − and B → X s γ, the isospin and CP asymmetries in B → K * γ, as well as A FB and F L in B → K * ℓ + ℓ − . We also discuss the transverse observable A (2) T which, once measured, may help to disentangle some of the scenarios considered. We explore the constraints on C 7 , C 9 , C 10 as well as their chirality-flipped counterparts. Within our framework, we find that we need to extend the constraints up to 1.6 σ to allow for the "flipped-sign solution" of C 7 . The SM solution for C 7 exhibits a very mild tension if New Physics is allowed in dipole operators only. We provide semi-numerical expressions for all these observables as functions of the relevant Wilson coefficients at the low scale.

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Section: Class-i Observablesmentioning

confidence: 66%

Exploring new physics in the C 7-C 7′ plane

Descotes-Genon

Ghosh

Matias

et al. 2011

J. High Energ. Phys.

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“…CP asymmetries in b → sγ transitions have been measured by BaBar [134–136], Belle [137, 138], and LHCb [139] and the results are consistent with SM expectations and statistically limited. In this context, it has been recently noted [140] that the difference in CP asymmetries between the inclusive processes and offers a cleaner probe of PBSM than either measurement taken on its own.…”

Section: Beauty Mixing and Cp Violationmentioning

confidence: 53%

Experimental constraints from flavour changing processes and physics beyond the Standard Model

Gersabeck

Serra²

2012

Eur. Phys. J. C

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Flavour physics has a long tradition of paving the way for direct discoveries of new particles and interactions. Results over the last decade have placed stringent bounds on the parameter space of physics beyond the Standard Model. Early results from the LHC, and its dedicated flavour factory LHCb, have further tightened these constraints and reiterate the ongoing relevance of flavour studies. The experimental status of flavour observables in the charm and beauty sectors is reviewed in measurements of CP violation, neutral meson mixing, and measurements of rare decays.

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“…Although the branching fraction of the B 0 → K * 0 γ decay has been measured [1][2][3] to be consistent with the Standard Model (SM) prediction [4], BSM effects could still be present and detectable through more detailed studies of the decay process. In particular, in the SM the photon helicity is predominantly left-handed, with a small right-handed current arising from long distance effects and from the non-zero value of the ratio of the s-quark mass to the b-quark mass.…”

Section: Introductionmentioning

confidence: 82%

“…[5] takes into account only the photon diagrams of figure 1. When evaluated in the 30 to 1000 MeV/c 2 e + e − invariant mass interval using B(B 0 → K * 0 γ) [1][2][3], it predicts a B 0 → K * 0 e + e − branching fraction of 2.35 × 10 −7 . A full calculation has been recently performed [30] and the numerical result for the e + e − invariant mass interval of interest is (2.43 +0.66 −0.47 ) × 10 −7 .…”

Section: Discussionmentioning

confidence: 99%

Measurement of the B 0 → K ∗0 e + e − branching fraction at low dilepton mass

Aaij¹,

Beteta²,

Adeva³

et al. 2013

J. High Energ. Phys.

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The branching fraction of the rare decay B 0 → K * 0 e + e − in the dilepton mass region from 30 to 1000 MeV/c 2 has been measured by the LHCb experiment, using pp collision data, corresponding to an integrated luminosity of 1.0 fb −1 , at a centre-of-mass energy of 7 TeV. The decay mode B 0 → J/ψ (e + e − )K * 0 is utilized as a normalization channel. The branching fraction B(B 0 → K * 0 e + e − ) is measured to bewhere the first error is statistical, the second is systematic, and the third comes from the uncertainties on the B 0 → J/ψ K * 0 and J/ψ → e + e − branching fractions.

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Measurement ofB→K*(892)γBranching Fractions andCPand Isospin Asymmetries

Cited by 37 publications

References 21 publications

Exploring new physics in the C 7-C 7′ plane

Exploring new physics in the C 7-C 7′ plane

Experimental constraints from flavour changing processes and physics beyond the Standard Model

Measurement of the B 0 → K ∗0 e + e − branching fraction at low dilepton mass

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