Inclusive semileptonic Λb decays in the Standard Model and beyond

Colangelo, P.; Fazio, F. De; Loparco, Francesco

doi:10.1007/jhep11(2020)032

Cited by 27 publications

(28 citation statements)

References 78 publications

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“…We collect in this Section some results obtained for observables in Λ → , ℓ − ¯ ℓ . We refer to [2] for the input parameters. For the couplings ℓ , , , , in (1), for = we use the ranges fixed in [31].…”

Section: Results For λ → ℓ ¯ ℓmentioning

confidence: 99%

“…In the case of baryons the dependence on the spin in ( 7) must be kept. In [2] M 1 ... have been derived at order 1/ 3 for a polarized baryon, considering all operators in (1). This extends previous results in [9,11,[21][22][23].…”

Section: Pos(eps-hep2021)552mentioning

confidence: 99%

“…The index runs over the contribution of the various operators and of their interferences. The coefficients ( ) depend on the NP couplings in (1) and can be found in [2].…”

Section: Pos(eps-hep2021)552mentioning

confidence: 99%

See 2 more Smart Citations

Probing New Physics with heavy hadron decays

Fazio¹,

Colangelo²,

Loparco³

2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

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The increasing number of flavour anomalies calls for the investigation of new processes where tensions similar to the observed ones could emerge. Observables sensitive to physics beyond the Standard Model need to be identified. We discuss the inclusive semileptonic decays of polarized beauty baryons, computed through the heavy quark expansion at O (1/ 3 ) and at the leading order in . We account for New Physics interactions in a model-independent way, extending the Standard Model → ℓ ¯ ℓ low energy Hamiltonian (with = , and ℓ = , , ) with the inclusion of the full set of D=6 semileptonic operators with left-handed neutrinos. We identify a set of promising observables, the study of which can be included in the physics programmes of future facilities, such as FCC-ee.

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Section: Results For λ → ℓ ¯ ℓmentioning

confidence: 99%

Section: Pos(eps-hep2021)552mentioning

confidence: 99%

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Probing New Physics with heavy hadron decays

Fazio¹,

Colangelo²,

Loparco³

2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

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“…which can be expanded into a series of local operators, resulting in an expansion in powers of Λ QCD /𝑚 𝑏 , with corrections starting at O Λ QCD /𝑚 𝑏 2 [4]. The structure functions 𝑊 𝑖 are computed in the OPE up to O Λ QCD /𝑚 𝑏 3 and can be found for example in [10].…”

Section: Inclusive Decays Of 𝐵 Mesonsmentioning

confidence: 99%

Comparison of lattice QCD results for inclusive semi-leptonic decays of $B$ mesons with the OPE

Gambino¹,

Hirano²,

Mächler³

2021

Preprint

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A recently proposed approach to compute the inclusive semi-leptonic decay rate on the lattice allows for the calculation of various quantities (differential distributions and moments) in different subchannels. We systematically compare the lattice QCD results for an unphysically light bottom quark with OPE-based predictions, including leading order perturbative and O 1/𝑚 3 power corrections, and explore possible strategies to decrease the systematic uncertainty.

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“…The observed deviations call for new investigations, in particular focused on other heavy hadron decay processes. Here, we analyze the inclusive semileptonic beauty baryon decays [2], for which the nonperturbative effects of strong interactions can be systematically treated exploiting an expansion in the inverse heavy quark mass [3,4].…”

Section: Introductionmentioning

confidence: 99%

Probing New Physics with heavy hadron decays

Colangelo¹,

Fazio²,

Loparco³

2021

Preprint

View full text Add to dashboard Cite

The increasing number of flavour anomalies calls for the investigation of new processes where tensions similar to the observed ones could emerge. Observables sensitive to physics beyond the Standard Model need to be identified. We discuss the inclusive semileptonic decays of polarized beauty baryons, computed through the heavy quark expansion at O (1/𝑚 3 𝑏 ) and at the leading order in 𝛼 𝑠 . We account for New Physics interactions in a model-independent way, extending the Standard Model 𝑏 → 𝑈ℓ νℓ low energy Hamiltonian (with 𝑈 = 𝑢, 𝑐 and ℓ = 𝑒, 𝜇, 𝜏) with the inclusion of the full set of D=6 semileptonic operators with left-handed neutrinos. We identify a set of promising observables, the study of which can be included in the physics programmes of future facilities, such as FCC-e.

show abstract

Inclusive semileptonic Λb decays in the Standard Model and beyond

Cited by 27 publications

References 78 publications

Probing New Physics with heavy hadron decays

Probing New Physics with heavy hadron decays

Comparison of lattice QCD results for inclusive semi-leptonic decays of $B$ mesons with the OPE

Probing New Physics with heavy hadron decays

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