Measurements of the branching fractions of Λc+ →pη and Λc+ →pπ0 decays at Belle

(The Belle Collaboration)

doi:10.1103/PhysRevD.103.072004

Measurements of the branching fractions of Λc+ →pη and Λc+ →pπ0 decays at Belle

(The Belle Collaboration)

Fudan University
The Graduate University for Advanced Studies
High Energy Accelerator Research Organization, Tsukuba
Korea University
The University of Tokyo
Brookhaven National Laboratory
Higher School of Economics
University of Tabuk
German Electron Synchrotron
Indian Institute of Technology Bhubaneswar
Indian Institute of Technology Madras
University of Mississippi
University of Bonn
University of Hawai'i at Mānoa
Indian Institute of Science Education and Research Mohali
Indian Institute of Technology Guwahati
Charles University
Jožef Stefan Institute
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
H. Niewodniczanski Institute of Nuclear Physics
National Institute for Nuclear Physics
University of Naples Federico II
Fu Jen Catholic University
National Central University
Hanyang University
RAS - P.N. Lebedev Physics Institute
Korea Institute of Science and Technology Information
Sungkyunkwan University
Indian Institute of Technology Hyderabad
Wayne State University
Malaviya National Institute of Technology
University of Melbourne
Pacific Northwest National Laboratory
Panjab University
Virginia Polytechnic Institute and State University

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)<8.0×10-5 at a 90% credibility level is set, more than 3 times better than the best current upper limit.

Original language	English
Article number	e072004
Journal	Physical Review D
Volume	103
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.103.072004
State	Published - 14 Apr 2021

Access to Document

10.1103/PhysRevD.103.072004

Cite this

@article{129f68a66301411ba1ae044bce8cfad2,

title = "Measurements of the branching fractions of Λc+ →pη and Λc+ →pπ0 decays at Belle",

abstract = "We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)<8.0×10-5 at a 90\% credibility level is set, more than 3 times better than the best current upper limit.",

author = "\{(The Belle Collaboration)\} and Li, \{S. X.\} and Shen, \{C. P.\} and I. Adachi and Ahn, \{J. K.\} and H. Aihara and Asner, \{D. M.\} and T. Aushev and R. Ayad and V. Babu and S. Bahinipati and P. Behera and J. Bennett and F. Bernlochner and M. Bessner and V. Bhardwaj and B. Bhuyan and T. Bilka and J. Biswal and A. Bobrov and A. Bozek and Browder, \{T. E.\} and M. Campajola and L. Cao and D. {\v C}ervenkov and Chang, \{M. C.\} and A. Chen and Cheon, \{B. G.\} and K. Chilikin and Cho, \{H. E.\} and K. Cho and Y. Choi and S. Choudhury and D. Cinabro and S. Cunliffe and S. Das and N. Dash and \{De Nardo\}, G. and R. Dhamija and \{Di Capua\}, F. and Z. Dole{\v Z}al and Dong, \{T. V.\} and S. Eidelman and D. Epifanov and T. Ferber and D. Ferlewicz and Fulsom, \{B. G.\} and R. Garg and V. Gaur and A. Garmash and H. Park",

note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",

year = "2021",

month = apr,

day = "14",

doi = "10.1103/PhysRevD.103.072004",

language = "English",

volume = "103",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "7",

}

TY - JOUR

T1 - Measurements of the branching fractions of Λc+ →pη and Λc+ →pπ0 decays at Belle

AU - (The Belle Collaboration)

AU - Li, S. X.

AU - Shen, C. P.

AU - Adachi, I.

AU - Ahn, J. K.

AU - Aihara, H.

AU - Asner, D. M.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Bahinipati, S.

AU - Behera, P.

AU - Bennett, J.

AU - Bernlochner, F.

AU - Bessner, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Biswal, J.

AU - Bobrov, A.

AU - Bozek, A.

AU - Browder, T. E.

AU - Campajola, M.

AU - Cao, L.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, H. E.

AU - Cho, K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Das, S.

AU - Dash, N.

AU - De Nardo, G.

AU - Dhamija, R.

AU - Di Capua, F.

AU - DoleŽal, Z.

AU - Dong, T. V.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Ferber, T.

AU - Ferlewicz, D.

AU - Fulsom, B. G.

AU - Garg, R.

AU - Gaur, V.

AU - Garmash, A.

AU - Park, H.

PY - 2021/4/14

Y1 - 2021/4/14

N2 - We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)<8.0×10-5 at a 90% credibility level is set, more than 3 times better than the best current upper limit.

AB - We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)<8.0×10-5 at a 90% credibility level is set, more than 3 times better than the best current upper limit.

UR - https://www.scopus.com/pages/publications/85104683173

U2 - 10.1103/PhysRevD.103.072004

DO - 10.1103/PhysRevD.103.072004

M3 - Article

AN - SCOPUS:85104683173

SN - 2470-0010

VL - 103

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - e072004

ER -

Measurements of the branching fractions of Λc+ →pη and Λc+ →pπ0 decays at Belle

Abstract

Access to Document

Other files and links

Fingerprint

Cite this