Time-reversal asymmetries in Λb semileptonic decays

Article Physics, Multidisciplinary

Observation of the Decay Λb0 → Λc+ τ-(ν)over-barτ

R. Aaij et al.

Summary: This article reports the first observation of the semileptonic b-baryon decay Lambda(0)(b) -> Lambda(+)(c) tau(-)(nu) over bar (tau), with the results consistent with the standard model prediction.

PHYSICAL REVIEW LETTERS (2022)

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Article Physics, Particles & Fields

Visible energy and angular distributions of the charged particle from the τ-decay in b → Cτ (μ(ν)over-barμντ, πντ, ρντ)(ν)over-barτ reactions

Neus Penalva et al.

Summary: In this study, we investigate the d(2)Gamma(d)/(d omega d cos theta(d)), d Gamma(d)/d cos theta(d), and d Gamma(d)/dE(d) distributions defined in terms of the visible energy and polar angle of the charged particle from tau-decay. We consider the deviations from the predictions of the standard model and the construction of new physics operators using both right- and left-handed neutrino fields. Results are presented for Lambda(b) -> Lambda(c)tau and (B) over bar -> D-(*())tau sequential decays, which could be used to distinguish between different new physics models.

JOURNAL OF HIGH ENERGY PHYSICS (2022)

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Review Physics, Multidisciplinary

REVIEW OF PARTICLE PHYSICS

R. L. Workman et al.

Summary: The Review provides a comprehensive summary of particle physics and cosmology, including measurements, searches for hypothetical particles, and summaries of properties and search limits. It consists of two volumes, with Summary Tables, review articles, and Particle Listings.

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS (2022)

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Article Astronomy & Astrophysics

Unbinned angular analysis of B → D*lνl and the right-handed current

Z. R. Huang et al.

Summary: In this article, we conducted a sensitivity study on the unbinned angular analysis of the B -> D*l nu(l) decay, taking into account the contributions from the right-handed current. We demonstrated that the angular observable can provide strong constraints on the right-handed current without the need to solve the unresolved V-cb puzzle.

PHYSICAL REVIEW D (2022)

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Article Physics, Particles & Fields

The measurable angular distribution of Λb0→Λc+→Λ0π+τ-→π-vτvτ decay

Quan-Yi Hu et al.

Summary: This paper investigates the Lambda b0 decay and constructs a measurable angular distribution to address issues that cannot be precisely determined in measurements. The study finds that different NP hypotheses have effects on angular observables, except for two specific observables.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

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Article Physics, Particles & Fields

Time-reversal asymmetries and angular distributions in Λb → ΛV

Chao-Qiang Geng et al.

Summary: The study investigates time-reversal (T) asymmetries in the decays of Lambda(b) -> Lambda V by analyzing spin correlations, suggesting nonfactorizable effects or new physics play a significant role in the decay of Lambda(b) -> Lambda phi. The research also explores possible T-violating effects from new physics in the decay process.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

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Review Physics, Particles & Fields

Averages of b-hadron, c-hadron, and τ-lepton properties as of 2018 Heavy Flavor Averaging Group (HFLAV)

Y. Amhis et al.

Summary: This paper reports world averages of measurements of b-hadron, c-hadron, and tau-lepton properties obtained by the Heavy Flavour Averaging Group using results available through September 2018. Adjustments are made to common input parameters used in various analyses to common values, taking known correlations into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters, CP violation parameters, parameters of semileptonic decays, and Cabibbo-Kobayashi-Maskawa matrix elements.

EUROPEAN PHYSICAL JOURNAL C (2021)

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Article Physics, Particles & Fields

Testing leptoquark/EFT in (B)over-bar → D(*)l(v)over-bar at the LHC

Syuhei Iguro et al.

Summary: The study investigates LHC constraints on New Physics using leptoquark models and an effective-field-theory Hamiltonian. It shows differences between LQs and EFT in terms of applicable LHC bounds. The EFT description is found to be invalid for searching for LQs with mass less than or equal to 10 TeV at the LHC and may lead to overestimated bounds. Future prospects for high luminosity LHC searches include exploring charge asymmetry in background and signal events.

EUROPEAN PHYSICAL JOURNAL C (2021)

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Article Physics, Particles & Fields

New physics in the angular distribution of Bc- → J/ψ(→μ+μ-)τ-(→π-ντ)ντ decay

Quan-Yi Hu et al.

Summary: In the study of Bc- -> J/psi(-> mu (+)mu (-))tau (-)nu tau decay, a measurable angular distribution is constructed by considering the subsequent decay tau (-) -> pi (-)nu (tau). The research predicts the q(2) distribution of angular observables and lepton-flavor-universality ratios within the Standard Model and at various NP benchmark points, highlighting the sensitivity of the ratios to the presence of pseudo-scalar operators. The study also discusses symmetries in angular observables and proposes a model-independent method to determine the existence of tensor operators.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

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Article Physics, Particles & Fields

New physics and the tau polarization vector in b → cτντ decays

Neus Penalva et al.

Summary: This study focuses on the role of the tau polarization vector P mu in the context of lepton flavor universality violation studies. The analysis reveals that a P -> component perpendicular to the plane defined by the three-momenta of the final hadron and the tau lepton is only possible for complex Wilson coefficients, indicating potential physics beyond the Standard Model. Different NP scenarios for various decays can be discriminated through detailed study of the polarization vector components, with special attention paid to corrections from complex Wilson coefficients in specific reactions.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

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Article Astronomy & Astrophysics

Semileptonic weak decays of antitriplet charmed baryons in the light-front formalism

C. Q. Geng et al.

Summary: The semileptonic decays of B-c -> B(n)l(+)nu(l) were systematically studied using the light-front constituent quark model, determining the spin-flavor structures of the constituents in baryons and calculating decay branching ratios and asymmetry parameters. Results are in agreement with experimental data, with predictions for specific decays consistent with literature and verifiable through experiments. Some results for Xi(+(0))(c) semileptonic channels can be tested at various experimental facilities.

PHYSICAL REVIEW D (2021)

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Article Physics, Particles & Fields

Measurement of the Λ0b → J/ψΛ angular distribution and the Λ0b polarisation in pp collisions

R. Aaij et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

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Article Physics, Particles & Fields

Bayesian fit analysis to full distribution data of (B)over-bar → D(*)l(ν)over-bar:|Vcb| determination and new physics constraints

Syuhei Iguro et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

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Article Physics, Particles & Fields

Inclusive semileptonic Λb decays in the Standard Model and beyond

P. Colangelo et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

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Article Astronomy & Astrophysics

Hadron and lepton tensors in semileptonic decays including new physics

Neus Penalva et al.

PHYSICAL REVIEW D (2020)

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Article Physics, Particles & Fields

A new angle on an old problem: helicity approach to neutron beta decay in the Standard Model

Stefan Groote et al.

EUROPEAN PHYSICAL JOURNAL C (2019)

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Article Physics, Particles & Fields

Up-down asymmetries of charmed baryon three-body decays

Jian-Yong Cen et al.

EUROPEAN PHYSICAL JOURNAL C (2019)

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Review Physics, Nuclear

Review of lepton universality tests in B decays

Simone Bifani et al.

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS (2019)

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Article Physics, Particles & Fields

Constraining new physics in b c transitions

Martin Jung et al.

JOURNAL OF HIGH ENERGY PHYSICS (2019)

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Article Physics, Particles & Fields

Angular analysis of Λb→ Λc→ (→ Λπ) ιυ$$($)over-bar

P. Boeer et al.

JOURNAL OF HIGH ENERGY PHYSICS (2019)

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Article Physics, Particles & Fields

Probing effects of new physics in Ab0 → Ac+ μ-μ(v)over-barμ

Martina Ferrillo et al.

JOURNAL OF HIGH ENERGY PHYSICS (2019)

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Article Astronomy & Astrophysics

Investigation of effects of new physics in Λb →Λcτ(ν)over-barτ decay

Xiao-Long Mu et al.

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

Further tests of lepton flavor universality from the charged lepton energy distribution in b → c semileptonic decays: The case of Λb → Λc l(v)over-barl

Neus Penalva et al.

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

Precise predictions for Λb→Λc semileptonic decays

Florian U. Bernlochner et al.

PHYSICAL REVIEW D (2019)

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Article Physics, Multidisciplinary

Measurement of the Ratio of the B0 → D-ι+vι and B0 → D- μ+vμ Branching Fractions Using Three-Prong τ-Lepton Decays

R. Aaij et al.

PHYSICAL REVIEW LETTERS (2018)

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Article Physics, Nuclear

Detailed study of the Λb → Λc τ (ν)over-barτ decay

E. Di Salvo et al.

INTERNATIONAL JOURNAL OF MODERN PHYSICS A (2018)

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Article Physics, Multidisciplinary

New Predictions for Lambda(b) -> Lambda(c) Semileptonic Decays and Tests of Heavy Quark Symmetry

Florian U. Bernlochner et al.

PHYSICAL REVIEW LETTERS (2018)

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Article Physics, Multidisciplinary

Measurement of the τ Lepton Polarization and R(D) in the Decay (B)over-bar → D τ- (v)over-barτ

S. Hirose et al.

PHYSICAL REVIEW LETTERS (2017)

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Article Physics, Multidisciplinary

Lifetime of Bc- Mesons Constrains Explanations for Anomalies in B → D(*) τν

Rodrigo Alonso et al.

PHYSICAL REVIEW LETTERS (2017)

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Article Physics, Particles & Fields

Λb → Λcτντ, decay in scalar and vector leptoquark scenarios

Xin-Qiang Li et al.

JOURNAL OF HIGH ENERGY PHYSICS (2017)

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Article Physics, Particles & Fields

Phenomenology of Λb →Λcτ(ν)over-barτ using lattice QCD calculations

Alakabha Datta et al.

JOURNAL OF HIGH ENERGY PHYSICS (2017)

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Article Physics, Particles & Fields

Extraction of |Vcb| from B→ D() lvl and the Standard Model predictions of R(D())

Sneha Jaiswal et al.

JOURNAL OF HIGH ENERGY PHYSICS (2017)

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Article Astronomy & Astrophysics

Λb → (Λc, p)τν decays within standard model and beyond

Rupak Dutta

PHYSICAL REVIEW D (2016)

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Article Astronomy & Astrophysics

Λb → Λcτ(τ)over-barτ decay in the standard model and with new physics

Shanmuka Shivashankara et al.

PHYSICAL REVIEW D (2015)

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Article Astronomy & Astrophysics

Semileptonic decay Λb → Λc + τ- + (ν)over-barτ in the covariant confined quark model

Thomas Gutsche et al.

PHYSICAL REVIEW D (2015)

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Correction Physics, Multidisciplinary

Measurement of the Ratio of Branching Fractions B((B)over-bar0 → D+τ-(ν)over-bart/B((B)over-bar0 → D+μ-(ν)over-barμ (vol 115, 111803, 2015)

R. Aaij

PHYSICAL REVIEW LETTERS (2015)

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Article Physics, Multidisciplinary

Measurement of the Ratio of Branching Fractions B((B)over-bar0 → D+τ-(ν)over-barτ)/B((B)over-bar0 → D+μ-(ν)over-barμ)

R. Aaij et al.

PHYSICAL REVIEW LETTERS (2015)

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Article Physics, Particles & Fields

Helicity analysis of semileptonic hyperon decays including lepton-mass effects

A. Kadeer et al.

EUROPEAN PHYSICAL JOURNAL C (2009)

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Time-reversal asymmetries in Λb semileptonic decays

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