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Semileptonic decays $Λ_{c}^{+} \to Λ ℓ^{+} ν_{ℓ} (ℓ = e, μ)$ in the covariant quark model and comparison with the new absolute branching fraction measurements of Belle and BESIII

Thomas Gutsche¹, Mikhail A. Ivanov², Jürgen G. Körner³, Valery E. Lyubovitskij^1,4,5, and Pietro Santorelli^6,7

¹Institut für Theoretische Physik, Universität Tübingen, Kepler Center for Astro and Particle Physics, Auf der Morgenstelle 14, D-72076 Tübingen, Germany
²Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
³PRISMA Cluster of Excellence, Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
⁴Department of Physics, Tomsk State University, 634050 Tomsk, Russia
⁵Mathematical Physics Department, Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia
⁶Dipartimento di Fisica, Università di Napoli Federico II, Complesso Universitario di Monte Sant’ Angelo, Via Cintia, Edificio 6, 80126 Napoli, Italy
⁷Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, 80126 Napoli, Italy

Phys. Rev. D 93, 034008 – Published 5 February, 2016

DOI: https://doi.org/10.1103/PhysRevD.93.034008

Abstract

We present precise theoretical predictions for the absolute branching fractions of $Λ_{c}^{+} \to Λ ℓ^{+} ν_{ℓ} (ℓ = e, μ)$ decays in the covariant confined quark model. This study is motivated by two recent and accurate measurements of the absolute branching fractions of $Λ_{c}^{+} \to p K^{-} π^{+}$ and $Λ_{c}^{+} \to Λ e^{+} ν_{e}$ by the Belle Collaboration at the KEKB and by the BESIII Collaboration at the BEPCII. Our predictions for the branching fractions are consistent with both experimental results. We also provide detailed numerical results for differential decay distributions and polarization observables.

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References (24)

A. Zupanc et al. (Belle Collaboration), Phys. Rev. Lett. 113, 042002 (2014).
K. A. Olive et al. (Particle Data Group Collaboration), Chin. Phys. C 38, 090001 (2014).
M. Ablikim et al. (BESIII Collaboration), Phys. Rev. Lett. 115, 221805 (2015).
M. A. Ivanov, V. E. Lyubovitskij, J. G. Körner, and P. Kroll, Phys. Rev. D 56, 348 (1997).
T. Gutsche, M. A. Ivanov, J. G. Körner, V. E. Lyubovitskij, and P. Santorelli, Phys. Rev. D 86, 074013 (2012).
T. Gutsche, M. A. Ivanov, J. G. Körner, V. E. Lyubovitskij, and P. Santorelli, Phys. Rev. D 87, 074031 (2013).
T. Gutsche, M. A. Ivanov, J. G. Körner, V. E. Lyubovitskij, and P. Santorelli, Phys. Rev. D 88, 114018 (2013).
T. Gutsche, M. A. Ivanov, J. G. Körner, V. E. Lyubovitskij, and P. Santorelli, Phys. Rev. D 90, 114033 (2014).
T. Gutsche, M. A. Ivanov, J. G. Körner, V. E. Lyubovitskij, P. Santorelli, and N. Habyl, Phys. Rev. D 91, 074001 (2015); 91, 119907 (2015); N. Habyl, T. Gutsche, M. A. Ivanov, J. G. Körner, V. E. Lyubovitskij, and P. Santorelli, Int. J. Mod. Phys. Conf. Ser. 39, 1560112 (2015).
J. G. Körner and G. A. Schuler, Phys. Lett. B 231, 306 (1989).
J. G. Körner and G. A. Schuler, Z. Phys. C 46, 93 (1990).
F. Krüger and J. Matias, Phys. Rev. D 71, 094009 (2005).
F. Hussain, J. G. Körner, M. Krämer, and G. Thompson, Z. Phys. C 51, 321 (1991); T. Mannel, W. Roberts, and Z. Ryzak, Nucl. Phys. B355, 38 (1991); F. Hussain, D. S. Liu, M. Krämer, J. G. Körner, and S. Tawfiq, B370, 259 (1992).
A. J. Buras, Nucl. Phys. B109, 373 (1976).
M. B. Gavela, Phys. Lett. 83B, 367 (1979).
R. Perez-Marcial, R. Huerta, A. Garcia, and M. Avila-Aoki, Phys. Rev. D 40, 2955 (1989); 44, 2203 (1991).
R. L. Singleton, Phys. Rev. D 43, 2939 (1991).
F. Hussain and J. G. Korner, Z. Phys. C 51, 607 (1991).
H. Y. Cheng and B. Tseng, Phys. Rev. D 53, 1457 (1996); 55, 1697 (1997).
A. Datta, arXiv:hep-ph/9504429.
C. W. Luo, Eur. Phys. J. C 1, 235 (1998).
R. S. Marques de Carvalho, F. S. Navarra, M. Nielsen, E. Ferreira, and H. G. Dosch, Phys. Rev. D 60, 034009 (1999).
Y. L. Liu, M. Q. Huang, and D. W. Wang, Phys. Rev. D 80, 074011 (2009).
J. G. Korner, M. Kramer, and D. Pirjol, Prog. Part. Nucl. Phys. 33, 787 (1994).

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Semileptonic decays $Λ_{c}^{+} \to Λ ℓ^{+} ν_{ℓ} (ℓ = e, μ)$ in the covariant quark model and comparison with the new absolute branching fraction measurements of Belle and BESIII

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Semileptonic decays Λc+→Λℓ+νℓ(ℓ=e,μ) in the covariant quark model and comparison with the new absolute branching fraction measurements of Belle and BESIII

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Semileptonic decays $Λ_{c}^{+} \to Λ ℓ^{+} ν_{ℓ} (ℓ = e, μ)$ in the covariant quark model and comparison with the new absolute branching fraction measurements of Belle and BESIII