Charmless two body hadronic decays of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Λ</mml:mi></mml:mrow><mml:mrow><mml:mi>b</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>baryon

Mohanta, Rukmani; Giri, A.; Khanna, M. P.

doi:10.1103/physrevd.63.074001

Cited by 31 publications

(31 citation statements)

References 33 publications

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“…Using the current world average B(B 0 → K + π − ) = (19.4 ± 0.6) × 10 −6 provided by the Heavy Flavor Averaging Group [24], and our measurement of the ratio between the b-quark hadronization probabilities f s /f d = 0.267 + 0.021 − 0.020 [26], we obtain the following branching fractions: These results are compatible with the current experimental averages [24] and with available theoretical predictions [27][28][29][30][31][32][33][34][35][36][37]. The measurements of B B 0 s → K + K − , B B 0 s → π + K − , B(B 0 → K + K − ) and B Λ 0 b → pπ − / B Λ 0 b → pK − are the most precise to date.…”

Section: Jhep10(2012)037supporting

confidence: 80%

Measurement of b-hadron branching fractions for two-body decays into charmless charged hadrons

Aaij¹,

Beteta²,

Adeva³

et al. 2012

J. High Energ. Phys.

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Based on data corresponding to an integrated luminosity of 0.37 fb −1 collected by the LHCb experiment in 2011, the following ratios of branching fractions are measured:where the first uncertainties are statistical and the second systematic. Using the current world average of B B 0 → K + π − and the ratio of the strange to light neutral B meson production f s /f d measured by LHCb, we obtain:The measurements of B B 0are the most precise to date. The decay mode B 0 s → π + π − is observed for the first time with a significance of more than 5σ.

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Section: Jhep10(2012)037supporting

confidence: 80%

Measurement of b-hadron branching fractions for two-body decays into charmless charged hadrons

Aaij¹,

Beteta²,

Adeva³

et al. 2012

J. High Energ. Phys.

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“…However, a study of the charmless hadronic decays Ã b ! h 1 h 2 , which has been undertaken in the generalized factorization approach [19,20], to the best of our knowledge, is still lacking in pQCD. Our aim is to fill in this gap and provide further tests of the k T factorization formalism to gain insight on the QCD dynamics of these decays.…”

Section: Introductionmentioning

confidence: 99%

Anatomy of the perturbative QCD approach to the baryonic decaysΛb→pπ,pK

et al. 2009

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We calculate the CP-averaged branching ratios and CP-violating asymmetries for the two-body charmless hadronic decays Ã b ! p, pK in the perturbative QCD (pQCD) approach to lowest order in s . The baryon distribution amplitudes involved in the factorization formulas are considered to the leading twist accuracy, and the distribution amplitudes of the proton are expanded to the next-to-leading conformal spin (i.e., ''P'' waves), the moments of which are determined from QCD sum rules. Our work shows that the contributions from the factorizable diagrams in Ã b ! p, pK decays are much smaller compared to the nonfactorizable diagrams in the conventional pQCD approach. We argue that this reflects the estimates of the Ã b ! p transition form factors in the k T factorization approach, which are found to be typically an order of magnitude smaller than those estimated in the light-cone sum rules and in the nonrelativistic quark model. As an alternative, we adopt a hybrid pQCD approach, in which we compute the factorizable contributions with the Ã b ! p form factors taken from the light-cone QCD sum rules. The nonfactorizable diagrams are evaluated utilizing the conventional pQCD formalism, which is free from the endpoint singularities. The predictions worked out here are confronted with the recently available data from the CDF Collaboration on the branching ratios and the direct CP asymmetries for the decays Ã b ! p and Ã b ! pK. The asymmetry parameter relevant for the anisotropic angular distribution of the emitted proton in the polarized Ã b baryon decays is also calculated for the two decay modes.

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“…The effective Hamiltonian describing both final state containing a baryon and a pseudo-scalar or a vector mesons, containing all the possible operators, can be written in the form [3]:…”

Section: Charmless Decaysmentioning

confidence: 99%

“…Their branching fractions can be significantly affected by New Physics contributions; under supersymmetric models with R-parity [2] violation, they can be increased by two orders of magnitude. Their CP-violating asymmetries are also interesting to measure in search for possible further anomalies: then may reach significant size O(30%) in the Standard Model [3], and are also sensitive to possible new physics sources.…”

Section: Introductionmentioning

confidence: 99%

Rare decays of B mesons and baryons at the Tevatron and the LHC

Volpi

2008

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Charmless two body hadronic decays of theΛbbaryon

Cited by 31 publications

References 33 publications

Measurement of b-hadron branching fractions for two-body decays into charmless charged hadrons

Measurement of b-hadron branching fractions for two-body decays into charmless charged hadrons

Anatomy of the perturbative QCD approach to the baryonic decaysΛb→pπ,pK

Rare decays of B mesons and baryons at the Tevatron and the LHC

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