Role of hyperfine mixing in b→c semileptonic decays of doubly-heavy baryons

E. Hernandez; J. Nieves

doi:10.1088/1674-1137/34/9/080

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2024年10月30日

Chinese Physics C> 2010, Vol. 34> Issue(9) : 1488-1490 DOI: 10.1088/1674-1137/34/9/080

Role of hyperfine mixing in b→c semileptonic decays of doubly-heavy baryons

E. Hernandez ,
J. Nieves

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Abstract：
We analyze the effects of hyperfine mixing in b→c semileptonic decays of doubly heavy baryons. We qualitatively confirm the results by W. Roberts and M. Pervin in Int. J. Mod. Phys. A, 2009, 24: 2401—2413, finding that mixing has a great impact on those transitions. However, predictions without mixing differ by a factor of 2 and this discrepancy translates to the mixed case where large differences in decay widths are observed between the two calculations.

References

[1]

. Jenkins E, Luke M, Manohar A V et al. Nuc. Phys. B, 1993,390: 463-4732. Roberts W, Pervin M. Int. J. Mod. Phys. A, 2008, 23:2817-28603. Roberts W, Pervin M. Int. J. Mod. Phys. A, 2009, 24:2401-24134. Albertus C, Hernández E, Nieves J et al. Eur. Phys. J. A.,2007, 32: 183-199; erratum ibid Eur. Phys. J. A, 2008, 36:1195. Semay C, Silvestre-Brac B. Z. Phys. C, 1994, 61: 271-2756. Albertus C,Hernández E, Nieves J. arXiv: 0911.08897. Ebert D, Faustov R N, Galkin V O et al. Phy. Rev D, 2002,66: 0140088. Mattson M, Alkhazov G, Atamantchouk A G et al (SELEX collaboration). Phys. Rev. Lett., 2002, 89: 1120019. Ebert D, Faustov R N, Galkin V O et al. Phy. Rev D, 2004,70: 014018; erratum ibid Phys. Rev. D, 2008, 77: 07990310. Faessler A, Gutsche T H, Ivanov M A et al. Phys. Rev. D,2009, 80: 034025

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E. Hernandez and J. Nieves. Role of hyperfine mixing in b→c semileptonic decays of doubly-heavy baryons[J]. Chinese Physics C, 2010, 34(9): 1488-1490. doi: 10.1088/1674-1137/34/9/080

E. Hernandez and J. Nieves. Role of hyperfine mixing in b→c semileptonic decays of doubly-heavy baryons[J]. Chinese Physics C, 2010, 34(9): 1488-1490. doi: 10.1088/1674-1137/34/9/080 shu

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Received: 2010-02-09
Revised: 1900-01-01

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Role of hyperfine mixing in b→c semileptonic decays of doubly-heavy baryons

E. Hernandez
J. Nieves

Received Date: 2010-02-09
Accepted Date: 1900-01-01
Available Online: 2010-09-05

Abstract:

We analyze the effects of hyperfine mixing in b→c semileptonic decays of doubly heavy baryons. We qualitatively confirm the results by W. Roberts and M. Pervin in Int. J. Mod. Phys. A, 2009, 24: 2401—2413, finding that mixing has a great impact on those transitions. However, predictions without mixing differ by a factor of 2 and this discrepancy translates to the mixed case where large differences in decay widths are observed between the two calculations.