Evidence for the singly Cabibbo suppressed decay Λc+ →pη and search for Λc+ →pπ0

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. Messchendorp; M. Tiemens; BESIII Collaboration

doi:10.1103/PhysRevD.95.111102

Evidence for the singly Cabibbo suppressed decay Λ_c⁺ →pη and search for Λ_c⁺ →pπ⁰

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. Messchendorp
, M. Tiemens
, BESIII Collaboration

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

49 Citations (Scopus)

98 Downloads (Pure)

Abstract

We study the singly Cabibbo suppressed decays Λc+→pη and Λc+→pπ0 using Λc+Λ- pairs produced by e+e- collisions at a center-of-mass energy of s=4.6 GeV. The data sample was collected by the BESIII detector at the BEPCII collider and corresponds to an integrated luminosity of 567 pb-1. We find the first evidence for the decay Λc+→pη with a statistical significance of 4.2σ and measure its branching fraction to be B(Λc+→pη)=(1.24±0.28(stat)±0.10(syst))×10-3. No significant Λc+→pπ0 signal is observed. We set an upper limit on its branching fraction B(Λc+→pπ0)<2.7×10-4 at the 90% confidence level.

Original language	English
Article number	111102
Journal	Physical Review D
Volume	95
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.95.111102
Publication status	Published - 30-Jun-2017

Keywords

QUARK
MODEL
NONLEPTONIC DECAYS
CHARMED BARYONS

Access to Document

10.1103/PhysRevD.95.111102

Evidence for the singly Cabibbo suppressed decayFinal publisher's version, 274 KBLicence: Taverne

Handle.net

Persistent link

Cite this

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., Tiemens, M., & BESIII Collaboration (2017). Evidence for the singly Cabibbo suppressed decay Λ_c⁺ →pη and search for Λ_c⁺ →pπ⁰. Physical Review D, 95(11), Article 111102. https://doi.org/10.1103/PhysRevD.95.111102

@article{1a2b4435c16340debdd78b7a414bd697,

title = "Evidence for the singly Cabibbo suppressed decay Λc+ →pη and search for Λc+ →pπ0",

abstract = "We study the singly Cabibbo suppressed decays Λc+→pη and Λc+→pπ0 using Λc+Λ- pairs produced by e+e- collisions at a center-of-mass energy of s=4.6 GeV. The data sample was collected by the BESIII detector at the BEPCII collider and corresponds to an integrated luminosity of 567 pb-1. We find the first evidence for the decay Λc+→pη with a statistical significance of 4.2σ and measure its branching fraction to be B(Λc+→pη)=(1.24±0.28(stat)±0.10(syst)){\texttimes}10-3. No significant Λc+→pπ0 signal is observed. We set an upper limit on its branching fraction B(Λc+→pπ0)<2.7{\texttimes}10-4 at the 90\% confidence level.",

keywords = "QUARK, MODEL, NONLEPTONIC DECAYS, CHARMED BARYONS",

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 J. Messchendorp and M. Tiemens and \{BESIII Collaboration\}",

year = "2017",

month = jun,

day = "30",

doi = "10.1103/PhysRevD.95.111102",

language = "English",

volume = "95",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "AMER PHYSICAL SOC",

number = "11",

}

Ablikim, M, Achasov, MN, Ahmed, S, Ai, XC, Albayrak, O, Albrecht, M, Ambrose, DJ, Haddadi, Z, Kalantar-Nayestanaki, N , Kavatsyuk, M, Löhner, H, Messchendorp, J, Tiemens, M & BESIII Collaboration 2017, 'Evidence for the singly Cabibbo suppressed decay Λ_c⁺ →pη and search for Λ_c⁺ →pπ⁰', Physical Review D, vol. 95, no. 11, 111102. https://doi.org/10.1103/PhysRevD.95.111102

TY - JOUR

T1 - Evidence for the singly Cabibbo suppressed decay Λc+ →pη and search for Λc+ →pπ0

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.

AU - Tiemens, M.

AU - BESIII Collaboration

PY - 2017/6/30

Y1 - 2017/6/30

N2 - We study the singly Cabibbo suppressed decays Λc+→pη and Λc+→pπ0 using Λc+Λ- pairs produced by e+e- collisions at a center-of-mass energy of s=4.6 GeV. The data sample was collected by the BESIII detector at the BEPCII collider and corresponds to an integrated luminosity of 567 pb-1. We find the first evidence for the decay Λc+→pη with a statistical significance of 4.2σ and measure its branching fraction to be B(Λc+→pη)=(1.24±0.28(stat)±0.10(syst))×10-3. No significant Λc+→pπ0 signal is observed. We set an upper limit on its branching fraction B(Λc+→pπ0)<2.7×10-4 at the 90% confidence level.

AB - We study the singly Cabibbo suppressed decays Λc+→pη and Λc+→pπ0 using Λc+Λ- pairs produced by e+e- collisions at a center-of-mass energy of s=4.6 GeV. The data sample was collected by the BESIII detector at the BEPCII collider and corresponds to an integrated luminosity of 567 pb-1. We find the first evidence for the decay Λc+→pη with a statistical significance of 4.2σ and measure its branching fraction to be B(Λc+→pη)=(1.24±0.28(stat)±0.10(syst))×10-3. No significant Λc+→pπ0 signal is observed. We set an upper limit on its branching fraction B(Λc+→pπ0)<2.7×10-4 at the 90% confidence level.

KW - QUARK

KW - MODEL

KW - NONLEPTONIC DECAYS

KW - CHARMED BARYONS

U2 - 10.1103/PhysRevD.95.111102

DO - 10.1103/PhysRevD.95.111102

M3 - Article

SN - 1550-7998

VL - 95

JO - Physical Review D

JF - Physical Review D

IS - 11

M1 - 111102

ER -