New strategies to extract β and γ from Bd→π+π− and Bs→K+K−

Fleischer, Robert

doi:10.1016/s0370-2693(99)00640-1

Cited by 244 publications

(310 citation statements)

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“…The study of CP violation in charmless charged two-body decays of neutral B mesons provides a test of the Cabibbo-Kobayashi-Maskawa (CKM) picture [1,2] of the Standard Model (SM), and is a sensitive probe to contributions of processes beyond SM [3][4][5][6][7]. However, quantitative SM predictions for CP violation in these decays are challenging because of the presence of loop (penguin) amplitudes, in addition to tree amplitudes.…”

Section: Introductionmentioning

confidence: 99%

“…Although this represents a limitation, penguin amplitudes may also receive contributions from non-SM physics. It is necessary to combine several measurements from such two-body decays, exploiting approximate flavour symmetries, in order to cancel or constrain the unknown hadronic factors [3,6].…”

Section: Introductionmentioning

confidence: 99%

“…As discussed in refs. [3,6,7], the hadronic parameters entering the B 0 → π + π − and B 0 s → K + K − decays are related by the U-spin symmetry, i.e. by the exchange of d and…”

Section: Introductionmentioning

confidence: 99%

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First measurement of time-dependent CP violation in $ B_s^0\to {K^{+}}{K^{-}} $ decays

Aaij¹,

Adeva²,

Adrover³

et al. 2013

J. High Energ. Phys.

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Direct and mixing-induced CP -violating asymmetries in B 0 s → K + K − decays are measured for the first time using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb −1 , collected with the LHCb detector at a centre-of-mass energy of 7 TeV. The results are C KK = 0.14 ± 0.11 ± 0.03 and S KK = 0.30 ± 0.12 ± 0.04, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for B 0 → π + π − decays to be C ππ = −0.38 ± 0.15 ± 0.02 and S ππ = −0.71 ± 0.13 ± 0.02, in good agreement with existing measurements.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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First measurement of time-dependent CP violation in $ B_s^0\to {K^{+}}{K^{-}} $ decays

Aaij¹,

Adeva²,

Adrover³

et al. 2013

J. High Energ. Phys.

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“…One approach is to use a particular theoretical framework to calculate these quantities (see, for instance, [11,21]). Alternatively, one can use measurements of B 0 d → π + π − , along with flavor SU(3) symmetry, to obtain P ′ and T ′ [12,14,22,23]. In this paper, we adopt the latter approach.…”

mentioning

confidence: 99%

“…These suffice to determine the magnitudes and relative strong phase of P and T , given the knowledge of γ. Using flavor SU(3) symmetry, these can be related to the magnitudes and relative strong phase of P ′ and T ′ [12,14,22,23]:…”

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confidence: 99%

Supersymmetric contributions toB⁰_s→K⁺K^-

Baek¹,

London²,

Matias³

et al. 2006

J. High Energy Phys.

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Inspired by the existing calculation of B → πK decays in supersymmetry (SUSY), we evaluate the dominant SUSY contributions to B 0 s → K + K − . We show that the observables of this process can be significantly modified in the presence of SUSY. In particular, the branching ratio can be increased considerably compared to the prediction of the standard model (SM). The effect is even more dramatic for the CP-violating asymmetries A dir and A mix . These asymmetries, expected to be small in the SM (A dir is predicted to take only positive values), change drastically with SUSY contributions. The measurement of these observables can therefore be used to detect the presence of physics beyond the SM, and put constraints on its parameters.

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