Erratum: Form factors for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Λ</mml:mi><mml:mi>b</mml:mi></mml:msub><mml:mo>→</mml:mo><mml:mi>Λ</mml:mi></mml:math>transitions in the soft-collinear effective theory [Phys. Rev. D<b>85</b>, 014035 (2012)]

Feldmann, Thorsten; Yip, Matthew W. Y.

doi:10.1103/physrevd.86.079901

Cited by 68 publications

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“…This method was applied to study the electromagnetic form factors of the nucleon [6,7], and Σ, Λ baryons [8,9], as well as to the study of the rare Λ b → Λl þ l − transition [10]. This rare decay has comprehensively been studied in the framework of the different approaches, such as the relativistic quark model [11], lattice QCD [12], soft collinear effective theory [13], heavy quark effective theory [14], etc.…”

Section: Introductionmentioning

confidence: 99%

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Form factors for the rare Λb(Λb*)→N<

2018

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Form factors of the rare Λ b ðΛ Ã b Þ → Nl þ l − decays are calculated in the framework of the light cone QCD sum rules by taking into account the contributions from the negative parity baryons. Using the obtained results on the form factors, the branching ratios of the considered decays are estimated. The numerical survey for the branching ratios of the− decays indicate that these transitions could be measurable in LHCb in near future. Comparison of our predictions on the form factors and branching ratios with those existing in the literature is also performed.

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Section: Introductionmentioning

confidence: 99%

“…The sum rules for iσ μν q ν γ 5 transition current can be obtained from equation (14) by making the replacements f…”

Section: Introductionmentioning

confidence: 99%

Form factors for the rare Λb(Λb*)→N<

2018

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“…Section 6). The amplitudes of the decays Λ b → p ν and Λ b → Λ c ν receive contributions from both the vector and the axial components of the current in the matrix elements p|qγ µ (1 − γ 5 )b|Λ b and Λ c |qγ µ (1 − γ 5 )b|Λ b , and can be parameterized in terms of six different form factors [72] -three in the parity-even sector and three in the parity-odd sector. All of them provide parametrically comparable contributions.…”

Section: Pos(lattice 2015)013mentioning

confidence: 99%

Progress and prospects for heavy flavour physics on the lattice

Peña¹

2016

Proceedings of the 33rd International Symposium on Lattice Field Theory — PoS(LATTICE 2015)

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“…Non-perturbative calculations of Λ b → Λ form factors have been performed extensively at large recoil using LCSRs with Λ-baryon distribution amplitudes (DAs) [11,12,13] and Λ b -baryon DAs [3,6], and carried out at low recoil with lattice QCD simulations [14]. Perturbative QCD calculation of Λ b → Λ form factors [15] based on the transverse-momentum-dependent (TMD) factorization theorem implies that the parametrically leading-power hard-scattering contribution is strongly suppressed at finite b-quark mass.…”

Section: The Fcncmentioning

confidence: 99%

Beauty baryon decays: a theoretical overview

Wang¹

2014

J. Phys.: Conf. Ser.

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Abstract. I overview the theoretical status and recent progress on the calculations of beauty baryon decays focusing on the QCD aspects of the exclusive semi-leptonic Λ b → p ℓν decay at large recoil and theoretical challenges of radiative and electro-weak penguin decays IntroductionInvestigating beauty baryon decays has been initiated in the early days of the heavy-quark effective theory (HQET) for the purpose of understanding the general properties of heavy-quark expansion, determining the CKM matrix elements and shedding light on physics beyond the Standard Model (BSM). In contrast to the B-meson decays, the helicity structure of the weak effective Hamiltonian can be extracted uniquely in bottom baryon decays with the aid of the baryon polarization asymmetry. On the theoretical side, QCD dynamics of a certain beauty baryon (i.e., Λ b ) is even simpler than that of B-mesons in the heavy quark limit. It is therefore natural to anticipate that beauty baryon decays will be helpful to sharpen our knowledge of the origin of CP violation and of the strong interaction dynamics, in particular taking into account the fact that no evident BSM signals have been detected yet in the intensive studies of B-meson decays.The aim of this brief review is to report the current status of theoretical calculations for weak form factors of the semi-leptonic Λ b → pℓν decay, and to elaborate the primary challenges of factorizing the QCD dynamics for radiative and electro-weak penguin Λ b → Λ γ, Λ ℓ + ℓ − decays.

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Erratum: Form factors forΛb→Λtransitions in the soft-collinear effective theory [Phys. Rev. D85, 014035 (2012)]

Cited by 68 publications

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Form factors for the rare Λb(Λb*)→N<

Form factors for the rare Λb(Λb*)→N<

Progress and prospects for heavy flavour physics on the lattice

Beauty baryon decays: a theoretical overview

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