First observation of the decay Λc+ →n KS0 π+π0

The BESIII collaboration

doi:10.1103/PhysRevD.109.053005

First observation of the decay Λc+ →n KS0 π+π0

The BESIII collaboration

Institute of Higher Research

CAS - Institute of High Energy Physics
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Novosibirsk State University
Uppsala University
Ruhr University Bochum
Chinese Academy of Sciences
Zhengzhou University
Johannes Gutenberg University Mainz
University of Turin
National Institute for Nuclear Physics
University of Science and Technology of China
Southeast University, Nanjing
Joint Institute for Nuclear Research
Peking University
University of Chinese Academy of Sciences
National Centre for Nuclear Research
Mongolian Academy of Sciences
Carnegie Mellon University
University of Münster
Wuhan University
Istanbul University
Nankai University
Moscow Institute of Physics and Technology
China University of Geosciences, Wuhan
Soochow University
Nanjing University
North China Electric Power University
Tsinghua University
CAS - Institute of Modern Physics
Jilin University
Hunan University
Chung-Ang University
Shandong University
Yunnan University
Helmholtz Institute Mainz
University of South China
University of Jinan
Liaoning University
Sun Yat-Sen University
University of Eastern Piedmont
University of Oxford
University of Ferrara
University of Manchester
GSI Helmholtz Centre for Heavy Ion Research
Guangxi University
Henan University of Technology
Nanjing Normal University
Shandong Normal University
Fudan University
Indiana University Bloomington
Henan Normal University
University of Hawai'i at Mānoa
Suranaree University of Technology
South China Normal University
University of the Punjab
Liaoning Normal University
Hangzhou Normal University
Huangshan College
University of Groningen
Indian Institute of Technology Madras
Justus Liebig University Giessen
Qufu Normal University
Renmin University of China
Lanzhou University
Hebei University
Sichuan University
Guangxi Normal University
Shanxi University
Central China Normal University
Henan University of Science and Technology
Central South University
Zhejiang University
Goethe University Frankfurt
COMSATS University Islamabad
The Department of Mathematical Sciences
University of Perugia
Universidad de Tarapacá
Petersburg Nuclear Physics Institute (PNPI)
Hunan Normal University
China Center of Advanced Science and Technology World Laboratory
Swiss Federal Institute of Technology Lausanne
Shanghai Jiao Tong University
Ministry of Education of the People's Republic of China
Near East University
University of Science and Technology Liaoning
Inner Mongolia University
Yantai University
Beihang University
Shanxi Normal University
Henan University

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

3 Scopus citations

Abstract

Based on 4.5 fb-1 of e+e- collision data accumulated at center-of-mass energies between 4599.53 and 4698.82 MeV with the BESIII detector, the decay Λc+→nKS0π+π0 is observed for the first time with a significance of 9.2σ. The branching fraction is measured to be (0.85±0.13±0.03)%, where the first uncertainty is statistical and the second is systematic, which differs from the theoretical prediction based on isospin by 4.4σ. This indicates that there may be resonant contributions or some unknown dynamics in this decay.

Original language	English
Article number	053005
Journal	Physical Review D
Volume	109
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.109.053005
State	Published - 1 Mar 2024

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10.1103/PhysRevD.109.053005

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title = "First observation of the decay Λc+ →n KS0 π+π0",

abstract = "Based on 4.5 fb-1 of e+e- collision data accumulated at center-of-mass energies between 4599.53 and 4698.82 MeV with the BESIII detector, the decay Λc+→nKS0π+π0 is observed for the first time with a significance of 9.2σ. The branching fraction is measured to be (0.85±0.13±0.03)\%, where the first uncertainty is statistical and the second is systematic, which differs from the theoretical prediction based on isospin by 4.4σ. This indicates that there may be resonant contributions or some unknown dynamics in this decay.",

author = "M. Ablikim and Achasov, \{M. N.\} and P. Adlarson and O. Afedulidis and S. Kabana and \{The BESIII collaboration\}",

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AU - Achasov, M. N.

AU - Adlarson, P.

AU - Afedulidis, O.

AU - Kabana, S.

AU - The BESIII collaboration

N1 - Publisher Copyright: © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2024/3/1

Y1 - 2024/3/1

N2 - Based on 4.5 fb-1 of e+e- collision data accumulated at center-of-mass energies between 4599.53 and 4698.82 MeV with the BESIII detector, the decay Λc+→nKS0π+π0 is observed for the first time with a significance of 9.2σ. The branching fraction is measured to be (0.85±0.13±0.03)%, where the first uncertainty is statistical and the second is systematic, which differs from the theoretical prediction based on isospin by 4.4σ. This indicates that there may be resonant contributions or some unknown dynamics in this decay.

AB - Based on 4.5 fb-1 of e+e- collision data accumulated at center-of-mass energies between 4599.53 and 4698.82 MeV with the BESIII detector, the decay Λc+→nKS0π+π0 is observed for the first time with a significance of 9.2σ. The branching fraction is measured to be (0.85±0.13±0.03)%, where the first uncertainty is statistical and the second is systematic, which differs from the theoretical prediction based on isospin by 4.4σ. This indicates that there may be resonant contributions or some unknown dynamics in this decay.

UR - https://www.scopus.com/pages/publications/85189096031

U2 - 10.1103/PhysRevD.109.053005

DO - 10.1103/PhysRevD.109.053005

M3 - Article

AN - SCOPUS:85189096031

SN - 2470-0010

VL - 109

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 053005

ER -

First observation of the decay Λc+ →n KS0 π+π0

Abstract

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