History of Applications

Meinel, Marjorie P.; Meinel, A. B.

doi:10.4324/9781315793245-14

Cited by 4 publications

(22 citation statements)

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“…We have predicted that B(Λ + c → ne + ν e ) = (2.8 ± 0.4, 4.9 ± 0.4, 5.2 ± 0.4) × 10 −3 in (a), (b) and (c), which agree with the previous analysis with SU(3) f in Ref. [4] as well as that the LQCD [22,23]. This mode can be observed at the experiments by BELLE and BESIII.…”

Section: Discussionsupporting

confidence: 90%

“…The decay of Λ + c → Λe + ν e has been extensively studied in the literature. In particular, its decay branching ratio has been found to be (1.42, 1.63, 2.78, 2.96, 3.6, 3.8)×10 −2 by the heavy quark effective theory (HQET) along with the non-relativistic quark model (NRQM) [15], QCD light front (LF) approach [17], covariant quark model (CQM) [18,19], MIT bag model (MBM) [20], NRQM [20] and lattice QCD (LQCD) [22,23]. Clearly, the predicted values in the models except NRQM and LQCD are inconsistent with the experimental data in Eq.…”

Section: Introductionmentioning

confidence: 99%

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Semileptonic decays of anti-triplet charmed baryons

et al. 2019

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We study the semileptonic decays B c → B n ℓ + ν ℓ where B c(n) is the anti-triplet-charmed (octet) baryon with the SU (3) f flavor symmetry and helicity formalism. In particular, we present the decay branching ratios of B c → B n ℓ + ν ℓ in three scenarios: (a) an exact SU (3) f symmetry with equal masses for the anti-triplet-charmed (octet) baryon states of B c (B n ), (b) SU (3) f parameters without the baryonic momentum-transfer dependence, and (c) SU (3) f with baryonic transition form factors in the heavy quark limit. We show that our results are all consistent with the existing data. Explicitly, we predict that B(Ξ + c → Ξ 0 e + ν e ) = (11.9 ± 1.3, 9.8 ± 1.1, 10.7 ± 0.9) × 10 −2 and B(Ξ 0 c → Ξ − e + ν e ) = (3.0 ± 0.3, 2.4 ± 0.3, 2.7 ± 0.2) × 10 −2 in the scenarios (a), (b) and (c) agree with the data of (14.0 +8.3 −8.7 ) × 10 −2 and (5.6 ± 2.6) × 10 −2 from the CLEO Collaboration, respectively. In addition, we obtain that B(Λ + c → ne + ν e ) = (2.8 ± 0.4, 4.9 ± 0.4, 5.1 ± 0.4) × 10 −3 in (a), (b) and (c).We also examine the longitudinal asymmetry parameters of α(B c → B n ℓ + ν ℓ ), which are sensitive to the different scenarios with SU (3) f . Some of the decay branching ratios and asymmetries can be observed by the ongoing experiments at BESIII and LHCb as well as the future searches by BELLEII.

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Semileptonic decays of anti-triplet charmed baryons

et al. 2019

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“…We have used the Fermi statistics to determine the overall spin-flavor-momentum structures and recover the spin-flavor symmetry with the quark and baryon masses and shape parameters. We have found that B(Λ + c → Λe + ν e ) = (3.43±0.57)% and 3.48% in LFCQM and MBM, which are consistent with the experimental data of (3.6 ± 0.4) × 10 −2 [2] as well as the values predicted by SU(3) F [22], LQCD [27,28] and RQM [29], but about a factor of two larger than those in HQET [26] and LF [30]. We have also obtained that α(Λ + c → Λe + ν e ) = (−0.96 ± 0.03) and −0.83 in LFCQM and MBM, which are lower and higher than but acceptable by the experimental data of −0.86 ±0.04 [2], respectively.…”

Section: Discussionsupporting

confidence: 89%

“…The errors in our results mainly come from the numerical fits of the MATLAB curve fitting toolbox in Appendix, in which the 95% confidence bounds are broadened and tightened in the time-like space-like regions, respectively. Our results are also consistent with those in the Lattice QCD (LQCD) [27,28] and relativistic quark model (RQM) [29].…”

Section: Baryonic Transition Form Factors In Mbmsupporting

confidence: 89%

“…In particular, we focus on the Λ + c semi-leptonic decays in this work. There are several theoretical analyses and lattice QCD calculations on the charmed baryon semi-leptonic decays with different models in the literature [26][27][28][29][30][31]. In this paper, we will mainly use the light-front (LF) formalism to study the decays and check the results in the MIT bag model (MBM) as comparisons.…”

Section: Introductionmentioning

confidence: 99%

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Semileptonic decays of $Λ_c^+$ in dynamical approaches

Geng,

Lih,

Liu

et al. 2020

Preprint

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We study the semileptonic decays of Λ + c → Λ(n)ℓ + ν ℓ in two relativistic dynamical approaches of the light-front constituent quark model (LFCQM) and MIT bag model (MBM). By considering the Fermi statistic between quarks and determining spin-flavor structures in baryons along with the helicity formalism in the two different dynamical models, we calculate the branching ratios (Bs) and averaged asymmetry parameters (αs) in the decays. Explicitly, we find that B(Λ + c → Λe + ν e ) = (3.43 ± 0.57, 3.48)% and α(Λ + c → Λe + ν e ) = (−0.96 ± 0.03, −0.83) in (LFCQM, MBM), in comparison with the data of B(Λ + c → Λe + ν e ) = (3.6 ± 0.4)% and α(Λ + c → Λe + ν e ) = −0.86 ± 0.04 given in the Particle Data Group, respectively. We also predict that B(Λ + c → ne + ν e ) = (2.15 ± 0.41, 2.55) × 10 −3 and α(Λ + c → ne + ν e ) = (−0.97 ± 0.01, −0.85) in (LFCQM, MBM), which could be observed by the ongoing experiments at BESIII, LHCb and BELLEII.

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Weak production of strange and charmed ground-state baryons in nuclei

et al. 2019

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We present results for the quasi-elastic weak production of Λ and Σ hyperons induced byν scattering off nuclei, in the kinematical region of interest for accelerator neutrino experiments. We employ realistic hole spectral functions and we describe the propagation of the hyperons in the nuclear medium by means of a Monte Carlo cascade. The latter strongly modifies the kinematics and the relative production rates of the hyperons, leading to a non-vanishing Σ + cross section, to a sizable enhancement of the Λ production and to a drastic reduction of the Σ 0 and Σ − distributions. We also compute the quasi-elastic weak Λc production cross section, paying special attention to estimate the uncertainties induced by the model dependence of the vacuum n → Λc weak matrix element. In this regard, the recent BESIII measurements of the branching ratios of Λc → Λl + ν l (l = e, µ) are used to benchmark the available theoretical predictions.

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History of Applications

Cited by 4 publications

References 0 publications

Semileptonic decays of anti-triplet charmed baryons

Semileptonic decays of anti-triplet charmed baryons

Semileptonic decays of $Λ_c^+$ in dynamical approaches

Weak production of strange and charmed ground-state baryons in nuclei

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