☆ 4.7 Article

Baryonic form factors induced by tensor currents in light-front approach

PHYSICAL REVIEW D (2023)

Related references

Note: Only part of the references are listed.

Article Astronomy & Astrophysics

Ξc - Ξ′c mixing from lattice QCD

Hang Liu et al.

Summary: In the heavy quark limit, the lowest-lying charmed baryons can form an SU(3) triplet and sextet. The Xi(c) and Xi'(c) in these states, with the same J(PC) quantum numbers, can mix due to the differences in quark masses. This study explores this mixing by calculating correlation functions and determines a mixing angle of 1.2 degrees +/- 0.1 degrees, which is insufficient to explain the observed symmetry breaking effects in weak decays of charmed baryons.

PHYSICS LETTERS B (2023)

Add to Collection

Article Astronomy & Astrophysics

Resolving puzzle in Ξc0→Ξ-e+νe with Ξc - Ξc' mixing spectrum within the quark model

Chao-Qiang Geng et al.

Summary: We studied the ratio R = 2 Gamma(Xi(0)(c) -> Xi- e(+)nu(e))/3 Gamma(Lambda(+)(c) -> Lambda e(+) nu(e)) and found it to be R = 1(0.8) based on exact(broken) SU(3) flavor symmetry, in contrast to the average value of R-av= 0.59 +/- 0.10 from the ALICE collaboration and lattice QCD results. To resolve this discrepancy, we proposed the use of Xi(c) - Xi(c)' mixing, which results in R approximately equal to 0.6. We also suggested experiments to measure the decays of Xi(c) -> Xi'(1530)e(+)nu(e) and discussed other evidences of mixing.

PHYSICS LETTERS B (2023)

Add to Collection

Article Astronomy & Astrophysics

Averages of b-hadron, c-handron, and t-lepton properties as of 2021

Y. Amhis et al.

PHYSICAL REVIEW D (2023)

Add to Collection

Article Astronomy & Astrophysics

Impact of Λb → Λcιν measurement on new physics in b → clν transitions

Marco Fedele et al.

Summary: Measurements from the BABAR, Belle, and LHCb collaborations consistently reveal a higher abundance of tau particles compared to channels with light leptons in B -> D-(*)iota(nu) over bar vertical bar B -> D((*))l(nu) over bar B-c -> J vertical bar psi iota(nu) over bar vertical bar B-c -> J vertical bar psi l(nu) over bar decays. However, there is a relative deficit of taus in the ratio Lambda(b) -> Lambda(c)iota(nu)over bar / Lambda(b) -> Lambda(c)l(nu)over bar. This paper critically examines whether the data still indicates a coherent pattern of deviations, considering the model-independent sum rule relating these decays. It is found that no common new physics explanation can account for all the ratios, within 2 sigma or 1.5 sigma, depending on the normalization to light lepton channels. Further measurements are needed to reach a coherent pattern of experimental results.

PHYSICAL REVIEW D (2023)

Add to Collection

Article Physics, Particles & Fields

Study on the weak decay between two heavy baryons Bi(1/2+) → Bf(3/2+) in the light-front quark model

Fang Lu et al.

Summary: In this work, the weak decay between two heavy baryons B-i(1/2(+)) -> B-f(3/2(+)) is studied using the light-front quark model with three-quark picture for baryon. The general form of transition amplitude of B-i(1/2(+)) -> B-f(3/2(+)) is derived, and two specific cases of transitions are analyzed: the weak decays of single heavy baryon Sigma(b) -> Sigma*(c) and the decays of double-charmed baryon Xi(cc) -> Sigma*(c) (Xi*(c)). The hadronic form factors are computed for the transitions and applied to study the decay widths of the semileptonic and non-leptonic decays. Future measurements on these channels will provide constraints on the nonperturbative parameter in the wavefunctions and test the model predictions.

EUROPEAN PHYSICAL JOURNAL C (2023)

Add to Collection

Article Astronomy & Astrophysics

Investigating the transition form factors of Λb → Λc(2625) and Ξb → Ξc(2815) and the corresponding weak decays with support from baryon spectroscopy

Yu-Shuai Li et al.

Summary: We calculate the form factors of the Ab -> Ac(2625) and Eb -> Ec(2815) transitions and evaluate the corresponding semileptonic and nonleptonic decays. Using the three-body light-front quark model and baryon spectroscopy, we obtain the spatial wave functions and compute the decay modes. Our results show that the branching ratios of the semileptonic processes can reach up to 1%, which is consistent with experimental data, and the nonleptonic decays to pi-, rho-, and D(*)- s final states have significant widths. These decay modes can be studied at the LHCb experiment.

PHYSICAL REVIEW D (2023)

Add to Collection

Article Astronomy & Astrophysics

Novel method for searching for the 80=+ c-800=+ c mixing effect in the angular distribution analysis of a four-body 80=+ c decay

Zhi-Peng Xing et al.

Summary: In this work, a novel method is proposed to search for the E0 thorn c - E0 thorn 0 c mixing effect in the angular distribution analysis of the Ec -> Eo0 thorn oA pi thorn l thorn nu decay. The appearance of the E0 resonance indicates the presence of the mixing effect, which can be observed using this angular distribution. The forward-backward asymmetry, as a function of the invariant mass square of Eo0 thorn and the E0 thorn c - E0 thorn 0 c mixing angle theta c, can be utilized to distinguish the two resonances and determine the exact mixing angle.

PHYSICAL REVIEW D (2023)

Add to Collection

Article Physics, Particles & Fields

Light quark decays of doubly heavy baryons in light front approach

Hang Liu et al.

Summary: We study the semileptonic and nonleptonic decays of doubly heavy baryons induced by the s -> u transition. The hadronic form factors are calculated using the light front quark model, and we analyze the decay modes of doubly heavy baryons using helicity amplitudes. Our results provide benchmark values for various observables and suggest that these decays are likely detectable in experiments such as LHCb. The potential data accumulated in the future can further enhance our understanding of the decay mechanism in the presence of two heavy quarks.

EUROPEAN PHYSICAL JOURNAL C (2023)

Add to Collection

Article Astronomy & Astrophysics

Baryons in the light-front approach: The three-quark picture

Zhen-Xing Zhao et al.

Summary: In this work, a three-quark picture is constructed using a bottom-up approach for baryons in a light-front quark model. The shape parameters, which characterize the momentum distribution inside a baryon, are determined with the help of the pole residue of the baryon. The relation between the three-quark picture and the diquark picture is clarified. When building the model, it is found that Lorentz boost plays a crucial role, and the bottom-up modeling approach can be generalized to multiquark states. Based on this, a unified theoretical framework for describing multiquark states may be established.

PHYSICAL REVIEW D (2023)

Add to Collection

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)

Add to Collection

Article Physics, Nuclear

Λb → Λc form factors from QCD light-cone sum rules

Yan Miao et al.

Summary: In this study, we calculate the transition form factors of Lambda(b) decaying into Lambda(c) using the framework of light-cone sum rules. We investigate different interpolation currents and distribution amplitude models, and present numerical predictions consistent with experimental data.

CHINESE PHYSICS C (2022)

Add to Collection

Article Physics, Nuclear

Scrutinizing new physics in semi-leptonic B c → J/ψτν decay

Ru-Ying Tang et al.

Summary: This study performs a global analysis of b -> c tau nu data using recent lattice results on form factors. By considering the effects of the tensor operator in new physics scenarios, the authors determine the tensor form factors using non-relativistic QCD relations. Predictions for various observables in different models are provided based on these results.

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS (2022)

Add to Collection

Article Astronomy & Astrophysics

Weak decays of triply heavy baryons in light front approach

Wei Wang et al.

Summary: In this study, we analyze weak decays of the triply heavy baryon Omega(++)(ccc) and calculate the form factors for Omega(++)(ccc)-> Xi(++)(cc) / Omega(+)(cc) transitions using a light front quark model. We predict the decay branching fractions for semi-leptonic decays and investigate forward-backward asymmetry and angular distributions. We also estimate the branching fractions for a few color-allowed processes and highlight the importance of the Omega(++)(ccc)-> Omega(+)(cc)pi(+) channel for the discovery of Omega(++)(ccc). This analysis provides a useful reference for future experimental searches.

PHYSICS LETTERS B (2022)

Add to Collection

Article Astronomy & Astrophysics

New physics effects on Λb → Λc*τ(ν)over-barτ decays

Meng-Lin Du et al.

Summary: This paper utilizes lattice determination to study the role of the Lambda(b) -> Lambda(c)* (2595)tau(nu) over bar (tau) and Lambda(c) (2625)tau(nu) over bar (tau) semileptonic decays in lepton flavor universality violation studies. By analyzing different observables, the paper compares the results obtained in the Standard Model and other schemes containing new physics interactions. The analysis shows that these decay reactions already have the potential to distinguish between different new physics scenarios, and this potential will improve with more precise form factors.

PHYSICAL REVIEW D (2022)

Add to Collection

Article Astronomy & Astrophysics

Next-to-leading order QCD calculation of Bc to charmonium tensor form factors

Wei Tao et al.

Summary: In this paper, we calculate the next-to-leading order QCD corrections to B-c -> eta(c) and B-c -> J/psi tensor form factors within the nonrelativistic QCD framework. We obtain the analytical results for Bc to S-wave charmonium tensor form factors. We also study the properties and relations among tensor form factors in the hierarchy heavy quark limit, and provide numerical results in all the physical region.

PHYSICAL REVIEW D (2022)

Add to Collection

Article Astronomy & Astrophysics

Revisiting the transition Ξcc+ +→ Ξc(′)+ to understand the data from LHCb

Hong-Wei Ke et al.

Summary: The LHCb collaboration has measured the decay rate of the doubly charmed baryon Xi cc(++) and reported a ratio of its branching fraction to another decay. This result contradicts theoretical predictions. The researchers used the light-front quark model to study the decay process and proposed a mixing mechanism to explain the discrepancy between the experimental result and theoretical predictions.

PHYSICAL REVIEW D (2022)

Add to Collection

Article Astronomy & Astrophysics

SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays

Xiao-Gang He et al.

Summary: Using flavor SU(3) symmetry, we analyzed the semileptonic decays of anti-triplet charmed baryons and found significant discrepancies between experimental data and theoretical predictions, indicating severe breaking of the SU(3) symmetry. We then considered generic SU(3) breaking effects, finding that the breaking effects are large but can be explained in different scenarios. Furthermore, we explored testable implications in some interesting scenarios that can be rigorously tested with more data.

PHYSICS LETTERS B (2021)

Add to Collection

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)

Add to Collection

Article Physics, Nuclear

Mixing angles of ΞQ-Ξ1Qin heavy quark effective theory

Yoshimitsu Matsui

Summary: The Heavy Quark Effective Theory provides a systematic method for estimating mixing angles of hadron states in heavy quarks, specifically charm quark (c) and bottom quark (b). By utilizing this method, accurate calculations of mixing angles for baryons like Xi Q- Xi Q can be obtained.

NUCLEAR PHYSICS A (2021)

Add to Collection

Article Physics, Nuclear

Bc → J/ψ tensor form factors at large momentum recoil

Dandan Shen et al.

Summary: In this study, a next-to-leading order relativistic correction to B-c -> J/psi tensor form factors within nonrelativistic QCD is presented. Complete Dirac bilinears c Gamma b with different matrices are considered in the b -> c transition. The relation among different current form factors exhibits symmetries in the heavy bottom quark limit and proposes the extraction of long-distance matrix elements for B-c meson from recent lattice data and NLO form factors at large momentum recoil.

INTERNATIONAL JOURNAL OF MODERN PHYSICS A (2021)

Add to Collection

Article Physics, Particles & Fields

A comprehensive analysis of weak transition form factors for doubly heavy baryons in the light front approach

Xiao-Hui Hu et al.

EUROPEAN PHYSICAL JOURNAL C (2020)

Add to Collection

Article Physics, Multidisciplinary

Measurement of R(D) and R(D*) with a Semileptonic Tagging Method

G. Caria et al.

PHYSICAL REVIEW LETTERS (2020)

Add to Collection

Article Physics, Nuclear

Tensor form factors of P→ P, S, V and A transitions within standard and covariant light-front approaches

Qin Chang et al.

CHINESE PHYSICS C (2020)

Add to Collection

Article Physics, Particles & Fields

The semi-leptonic form factors of Λb → Λc and Ξb → Ξc in QCD sum rules

Zhen-Xing Zhao et al.

EUROPEAN PHYSICAL JOURNAL C (2020)

Add to Collection

Article Physics, Multidisciplinary

R(J/ψ) and Bc- → J/ψl(ν)over-barl Lepton Flavor Universality Violating Observables from Lattice QCD

Judd Harrison et al.

PHYSICAL REVIEW LETTERS (2020)

Add to Collection

Article Physics, Particles & Fields

Revisiting Λb→Λc and Σb→Σc weak decays in the light-front quark model

Hong-Wei Ke et al.

EUROPEAN PHYSICAL JOURNAL C (2019)

Add to Collection

Article Physics, Nuclear

Σb → Σc* weak decays in the light-front quark model with two schemes to deal with the polarization of diquark

Hong-Wei Ke et al.

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

Add to Collection

Article Physics, Nuclear

Study of the s → dv(v)over-bar rare hyperon decays in the Standard Model and new physics

Xiao-Hui Hu et al.

CHINESE PHYSICS C (2019)

Add to Collection

Article Astronomy & Astrophysics

Precise predictions for Λb→Λc semileptonic decays

Florian U. Bernlochner et al.

PHYSICAL REVIEW D (2019)

Add to Collection

Article Physics, Multidisciplinary

Measurement of the Ratio of Branching Fractions B(B-c(+) -> J/psi tau(+)nu(tau))/B(B-c(+) -> J/psi mu(+)nu(mu))

R. Aaij et al.

PHYSICAL REVIEW LETTERS (2018)

Add to Collection

Editorial Material Multidisciplinary Sciences

Recent anomalies in B physics

Ying Li et al.

SCIENCE BULLETIN (2018)

Add to Collection

Article Physics, Particles & Fields

Weak decays of doubly heavy baryons: the 1/2 → 3/2 case

Zhen-Xing Zhao

EUROPEAN PHYSICAL JOURNAL C (2018)

Add to Collection

Article Astronomy & Astrophysics

Weak decays of doubly heavy baryons: The FCNC processes

Zhi-Peng Xing et al.

PHYSICAL REVIEW D (2018)

Add to Collection

Article Astronomy & Astrophysics

Measurement of the tau lepton polarization and R(D) in the decay (B)over-bar -> Dtau(-)(nu)over-bar(tau) with one-prong hadronic tau decays at Belle

S. Hirose et al.

PHYSICAL REVIEW D (2018)

Add to Collection

Article Astronomy & Astrophysics

Footprints of new physics in b -> c tau nu transitions

Zhuo-Ran Huang et al.

PHYSICAL REVIEW D (2018)

Add to Collection

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)

Add to Collection

Article Physics, Particles & Fields

Λb → Λcτντ, decay in scalar and vector leptoquark scenarios

Xin-Qiang Li et al.

JOURNAL OF HIGH ENERGY PHYSICS (2017)

Add to Collection

Article Physics, Particles & Fields

Bc → Bs J form factors and Bc decays into Bs J in covariant light-front approach

Yu-Ji Shi et al.

EUROPEAN PHYSICAL JOURNAL C (2016)

Add to Collection

Article Astronomy & Astrophysics

Measurement of the branching ratio of (B)over-bar0 → D+τ-(ν)over-barτ relative to (B)over-bar0 → D+l-(ν)over-barl decays with a semileptonic tagging method

Y. Sato et al.

PHYSICAL REVIEW D (2016)

Add to Collection

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)

Add to Collection

Article Astronomy & Astrophysics

Measurement of the branching ratio of (B)over-bar → D()τ-(ν)over-barτ relative to (B)over-bar → D()l-(ν)over-barl decays with hadronic tagging at Belle

M. Huschle et al.

PHYSICAL REVIEW D (2015)

Add to Collection

Article Astronomy & Astrophysics

Charmed bottom baryon spectroscopy from lattice QCD

Zachary S. Brown et al.

PHYSICAL REVIEW D (2014)

Add to Collection

Article Astronomy & Astrophysics

Measurement of an excess of (B)over-bar → D(*) τ-(v)over-barτ decays and implications for charged Higgs bosons

J. P. Lees et al.

PHYSICAL REVIEW D (2013)

Add to Collection

Article Astronomy & Astrophysics

Anomalous enhancement observed in B → D(*)τ(ν)over-barτ decays

P. Biancofiore et al.

PHYSICAL REVIEW D (2013)

Add to Collection

Article Astronomy & Astrophysics

Testing leptoquark models in (B)over-bar → D τν

Yasuhito Sakaki et al.

PHYSICAL REVIEW D (2013)

Add to Collection

Article Physics, Nuclear

Decay constants and form factors of s-wave and p-wave mesons in the covariant light-front quark model

R. C. Verma

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS (2012)

Add to Collection

Article Astronomy & Astrophysics

Σb → Σc and Ωb → Ωc weak decays in the light-front quark model

Hong-Wei Ke et al.

PHYSICAL REVIEW D (2012)

Add to Collection

Article Physics, Multidisciplinary

Evidence for an Excess of (B)over-bar → D(*) τ-(ν)over-barτ Decays

J. P. Lees et al.

PHYSICAL REVIEW LETTERS (2012)

Add to Collection

Article Astronomy & Astrophysics

Mixing angle of hadrons in QCD: A new view

T. M. Aliev et al.

PHYSICAL REVIEW D (2011)

Add to Collection

Article Astronomy & Astrophysics

Bs → Ds(3040) form factors and Bs decays into Ds(3040)

Gang Li et al.

PHYSICAL REVIEW D (2010)

Add to Collection

Correction Astronomy & Astrophysics

Model-independent description of B → πlv decays and a determination of |Vub| (vol 79, 013008, 2009)

Claude Bourrely et al.

PHYSICAL REVIEW D (2010)

Add to Collection

Article Physics, Particles & Fields

Theoretical and phenomenological constraints on form factors for radiative and semi-leptonic B-meson decays

Aoife Bharucha et al.

JOURNAL OF HIGH ENERGY PHYSICS (2010)

Add to Collection

Article Astronomy & Astrophysics

Model-independent description of B → πlν decays and a determination of |Vub|

Claude Bourrely et al.

PHYSICAL REVIEW D (2009)

Add to Collection

Article Astronomy & Astrophysics

Diquarks and Lambda(b)->Lambda(c) weak decays

Hong-Wei Ke et al.

PHYSICAL REVIEW D (2008)

Add to Collection

Article Astronomy & Astrophysics

Covariant light-front approach for s-wave and p-wave mesons:: Its application to decay constants and form factors -: art. no. 074025

HY Cheng et al.

PHYSICAL REVIEW D (2004)

Add to Collection

Correction Astronomy & Astrophysics

Ground-state scalar (q)over-barq nonet:: SU(3) mass splittings and strong, electromagnetic, and weak decay rates (vol D 69, art no 014010, 2004) -: art. no. 059901

MD Scadron et al.

PHYSICAL REVIEW D (2004)

Add to Collection

Article Astronomy & Astrophysics

Ground-state scalar (q)over-barq nonet: SU(3) mass splittings and strong, electromagnetic, and weak decay rates

MD Scadron et al.

PHYSICAL REVIEW D (2004)

Add to Collection

© Peeref 2019-2024. All rights reserved.