Detailed study of the 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>b</mml:mi></mml:msub><mml:mo stretchy="false">→</mml:mo><mml:mi mathvariant="normal">Λ</mml:mi><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>−</mml:mo></mml:msup></mml:math>
 decays in the standard model

Bhattacharya, Srimoy; Nandi, Soumitra; Patra, S. K.; Sain, Ria

doi:10.1103/physrevd.101.073006

Cited by 8 publications

(2 citation statements)

References 32 publications

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“…This clearly demonstrates that because 9 Check ref. [24] and references therein for details on the way this analysis is performed. not a single data-point is tagged as an influential one, the observables with the largest 'pull's, would, quite safely, be considered as outliers.…”

Section: Our Main Resultsmentioning

confidence: 99%

A closer look at the extraction of $|V_{ub}|$ from $B\toπlν$

Biswas,

Nandi,

Patra

et al. 2021

Preprint

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To extract the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |V ub |, we have re-analyzed all the available inputs (data and theory) on the B → π ν decays including the newly available inputs on the form-factors from light cone sum rule (LCSR) approach. We have reproduced and compared the results with the procedure taken up by the Heavy Flavor Averaging Group (HFLAV), while commenting on the effect of outliers on the fits. After removing the outliers and creating a comparable group of data-sets, we mention a few scenarios in the extraction of |V ub |. In all those scenarios, the extracted values of |V ub | are higher than that obtained by HFLAV. Our best results for |V ub | exc. are (3.88 ± 0.13) × 10 −3 and (3.87 ± 0.13) × 10 −3 in frequentist and Bayesian approaches, respectively, which are consistent with that extracted from inclusive decays |V ub | inc within 1 σ confidence interval.

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Section: Our Main Resultsmentioning

confidence: 99%

A closer look at the extraction of $|V_{ub}|$ from $B\toπlν$

Biswas,

Nandi,

Patra

et al. 2021

Preprint

Self Cite

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show abstract

“…An updated phenomenological analysis of Λ 𝑏 → Λ(→ 𝑝𝜋 − )𝜇 + 𝜇 − has recently been performed in [19] (for another recent fit, see also [20]). Notably, this includes new results for the parityviolating parameter 𝛼, the measurement of the complete set of angular observables from LHCb [21], constraints from the time-integrated branching fraction for 𝐵 𝑠 → 𝜇 + 𝜇 − , as well as an updated value for the Λ 𝑏 fragmentation function and the resulting branching fraction for Λ 𝑏 → 𝐽/𝜓Λ which is used as a normalization in the LHCb measurement of Λ 𝑏 → Λ𝜇 + 𝜇 − .…”

Section: Decays Of λ 𝑏 Baryonsmentioning

confidence: 99%

Theory: Angular Distributions in Rare B Decays

Feldmann¹

2021

Proceedings of 19th International Conference on B-Physics at Frontier Machines — PoS(BEAUTY2020)

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The time-dependent angular analysis of Bd → KSℓℓ, a new benchmark for new physics

Descotes-Genon

Novoa-Brunet

Vos

2021

J. High Energ. Phys.

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We consider the time-dependent analysis of Bd→ KSℓℓ taking into account the time-evolution of the Bd meson and its mixing into $$ {\overline{B}}_d $$ B ¯ d . We discuss the angular conventions required to define the angular observables in a transparent way with respect to CP conjugation. The inclusion of time evolution allows us to identify six new observables, out of which three could be accessed from a time-dependent tagged analysis. We also show that these observables could be obtained by time-integrated measurements in a hadronic environment if flavour tagging is available. We provide simple and precise predictions for these observables in the SM and in NP models with real contributions to SM and chirally flipped operators, which are independent of form factors and charm-loop contributions. As such, these observables provide robust and powerful cross-checks of the New Physics scenarios currently favoured by global fits to b → sℓℓ data. In addition, we discuss the sensitivity of these observables with respect to NP scenarios involving scalar and tensor operators, or CP-violating phases. We illustrate how these new observables can provide a benchmark to discriminate among the various NP scenarios in b → sμμ. We discuss the extension of these results for Bs decays into f0, η or η′.

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Detailed study of the Λb→Λℓ+ℓ− decays in the standard model

Cited by 8 publications

References 32 publications

A closer look at the extraction of $|V_{ub}|$ from $B\toπlν$

A closer look at the extraction of $|V_{ub}|$ from $B\toπlν$

Theory: Angular Distributions in Rare B Decays

The time-dependent angular analysis of Bd → KSℓℓ, a new benchmark for new physics

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