Measurement of the absolute branching fraction for Λc +→Λμ+νμ

M. Ablikim; M. N. Achasov; S. Ahmed; X. C. Ai; O.  Albayrak; M. Albrecht; D. J. Ambrose; Z. Haddadi; N. Kalantar-Nayestanaki; M. Kavatsyuk; H. Löhner; J. G. Messchendorp; M. Tiemens; BESIII Collaboration

doi:10.1016/j.physletb.2017.01.047

Measurement of the absolute branching fraction for Λ_c ⁺→Λμ⁺ν_μ

M. Ablikim, M. N. Achasov, S. Ahmed, X. C. Ai, O. Albayrak, M. Albrecht, D. J. Ambrose, Z. Haddadi, N. Kalantar-Nayestanaki, M. Kavatsyuk, H. Löhner, J. G. Messchendorp, M. Tiemens, BESIII Collaboration

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Abstract

We report the first measurement of the absolute branching fraction for Λ_c ⁺→Λμ⁺ν_μ. This measurement is based on a sample of e⁺e⁻ annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λ_c ⁺→Λμ⁺νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λ_c⁺→Λμ⁺νμ)/B(Λ_c ⁺→Λe⁺ν_e) to be 0.96±0.16(stat)±0.04(syst).

Original language	English
Pages (from-to)	42-47
Number of pages	6
Journal	Physics Letters B
Volume	767
DOIs	https://doi.org/10.1016/j.physletb.2017.01.047
Publication status	Published - 10-Apr-2017

Keywords

PREDICTIONS
MODEL
SEMILEPTONIC DECAYS
CHARMED BARYONS
HEAVY-QUARK
Absolute branching fraction
BESIII
Lambda(+)(c)
Semi-leptonic decay

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Ablikim, M., Achasov, M. N., Ahmed, S., Ai, X. C., Albayrak, O., Albrecht, M., Ambrose, D. J., Haddadi, Z., Kalantar-Nayestanaki, N., Kavatsyuk, M., Löhner, H., Messchendorp, J. G., Tiemens, M., & BESIII Collaboration (2017). Measurement of the absolute branching fraction for Λ_c ⁺→Λμ⁺ν_μ. Physics Letters B, 767, 42-47. https://doi.org/10.1016/j.physletb.2017.01.047

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title = "Measurement of the absolute branching fraction for Λc +→Λμ+νμ",

abstract = "We report the first measurement of the absolute branching fraction for Λc +→Λμ+νμ. This measurement is based on a sample of e+e− annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λc +→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λc +→Λμ+νμ)/B(Λc +→Λe+νe) to be 0.96±0.16(stat)±0.04(syst).",

keywords = "PREDICTIONS, MODEL, SEMILEPTONIC DECAYS, CHARMED BARYONS, HEAVY-QUARK, Absolute branching fraction, BESIII, Lambda(+)(c), Semi-leptonic decay",

author = "M. Ablikim and Achasov, {M. N.} and S. Ahmed and Ai, {X. C.} and O. Albayrak and M. Albrecht and Ambrose, {D. J.} and Z. Haddadi and N. Kalantar-Nayestanaki and M. Kavatsyuk and H. L{\"o}hner and Messchendorp, {J. G.} and M. Tiemens and {BESIII Collaboration}",

year = "2017",

month = apr,

day = "10",

doi = "10.1016/j.physletb.2017.01.047",

language = "English",

volume = "767",

pages = "42--47",

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TY - JOUR

T1 - Measurement of the absolute branching fraction for Λc +→Λμ+νμ

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Ai, X. C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Haddadi, Z.

AU - Kalantar-Nayestanaki, N.

AU - Kavatsyuk, M.

AU - Löhner, H.

AU - Messchendorp, J. G.

AU - Tiemens, M.

AU - BESIII Collaboration

PY - 2017/4/10

Y1 - 2017/4/10

N2 - We report the first measurement of the absolute branching fraction for Λc +→Λμ+νμ. This measurement is based on a sample of e+e− annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λc +→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λc +→Λμ+νμ)/B(Λc +→Λe+νe) to be 0.96±0.16(stat)±0.04(syst).

AB - We report the first measurement of the absolute branching fraction for Λc +→Λμ+νμ. This measurement is based on a sample of e+e− annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λc +→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λc +→Λμ+νμ)/B(Λc +→Λe+νe) to be 0.96±0.16(stat)±0.04(syst).

KW - PREDICTIONS

KW - MODEL

KW - SEMILEPTONIC DECAYS

KW - CHARMED BARYONS

KW - HEAVY-QUARK

KW - Absolute branching fraction

KW - BESIII

KW - Lambda(+)(c)

KW - Semi-leptonic decay

U2 - 10.1016/j.physletb.2017.01.047

DO - 10.1016/j.physletb.2017.01.047

M3 - Article

SN - 0370-2693

VL - 767

SP - 42

EP - 47

JO - Physics Letters B

JF - Physics Letters B

ER -