Measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu)

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 Lambda(+)(c) -> Lambda mu(+)nu(mu)

Z. Haddadi, N. Kalantar-Nayestanaki, M. Kavatsyuk, H. Löhner, J. G. Messchendorp, M. Tiemens, BESIII Collaboration

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We report the first measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu).This measurement is based on a sample of e+e(-) annihilation data produced at a center-of-mass energy root 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( Lambda(+)(c) -> Lambda mu(+)nu(mu)) = (3.49 +/- 0.46( stat) +/- 0.27( syst))%. In addition, we calculate the ratio B( Lambda(+)(c) -> Lambda mu(+)nu(mu))/B(Lambda(+)(c) -> Lambda e(+)nu(e) to be 0.96 +/- 0.16( stat) +/- 0.04( syst)

Originele taal-2	English
Pagina's (van-tot)	42-47
Aantal pagina's	6
Tijdschrift	Physics Letters B
Volume	767
DOI's	https://doi.org/10.1016/j.physletb.2017.01.047
Status	Published - 10-apr.-2017

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@article{fddf39b5d04342289fbf6c74b18134f1,

title = "Measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu)",

abstract = "We report the first measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu).This measurement is based on a sample of e+e(-) annihilation data produced at a center-of-mass energy root 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( Lambda(+)(c) -> Lambda mu(+)nu(mu)) = (3.49 +/- 0.46( stat) +/- 0.27( syst))%. In addition, we calculate the ratio B( Lambda(+)(c) -> Lambda mu(+)nu(mu))/B(Lambda(+)(c) -> Lambda e(+)nu(e) 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 = "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",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "ELSEVIER SCIENCE BV",

}

TY - JOUR

T1 - Measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu)

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 Lambda(+)(c) -> Lambda mu(+)nu(mu).This measurement is based on a sample of e+e(-) annihilation data produced at a center-of-mass energy root 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( Lambda(+)(c) -> Lambda mu(+)nu(mu)) = (3.49 +/- 0.46( stat) +/- 0.27( syst))%. In addition, we calculate the ratio B( Lambda(+)(c) -> Lambda mu(+)nu(mu))/B(Lambda(+)(c) -> Lambda e(+)nu(e) to be 0.96 +/- 0.16( stat) +/- 0.04( syst)

AB - We report the first measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu).This measurement is based on a sample of e+e(-) annihilation data produced at a center-of-mass energy root 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( Lambda(+)(c) -> Lambda mu(+)nu(mu)) = (3.49 +/- 0.46( stat) +/- 0.27( syst))%. In addition, we calculate the ratio B( Lambda(+)(c) -> Lambda mu(+)nu(mu))/B(Lambda(+)(c) -> Lambda e(+)nu(e) 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 -