First Observation of $\Lambda\pi^+$ and $\Lambda\pi^-$ Signals near the $\bar{K}N (I=1)$ Mass Threshold in $\Lambda_c^+\rightarrow\Lambda\pi^+\pi^+\pi^-$ Decay

A. B. Kaliyar; A. Bobrov; A. Bozek; A. Budano; A. Chen; A. Garmash; A. Giri; A. Ishikawa; A. Korobov; A. Natochii

First Observation of Λπ^+ and Λπ^- Signals near the bar{K}N (I=1) Mass Threshold in Λ_c^+rightarrowΛπ^+π^+π^- Decay

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2211.11151 v2 pith:F44DRMIM submitted 2022-11-21 hep-ex

First Observation of Λπ^+ and Λπ^- Signals near the bar{K}N (I=1) Mass Threshold in Λ_c^+rightarrowΛπ^+π^+π^- Decay

Belle Collaboration: Y. Ma , J. Yelton , K. Tanida , I. Adachi , J. K. Ahn , H. Aihara , S. Al Said , D. M. Asner

show 189 more authors

H. Atmacan T. Aushev R. Ayad V. Babu S. Bahinipati Sw. Banerjee P. Behera K. Belous J. Bennett M. Bessner B. Bhuyan T. Bilka D. Biswas A. Bobrov D. Bodrov J. Borah A. Bozek M. Bra\v{c}ko P. Branchini T. E. Browder A. Budano M. Campajola D. \v{C}ervenkov M.-C. Chang A. Chen B. G. Cheon K. Chilikin H. E. Cho K. Cho S.-J. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Das G. De Nardo G. De Pietro R. Dhamija F. Di Capua J. Dingfelder Z. Dole\v{z}al T. V. Dong D. Epifanov T. Ferber D. Ferlewicz B. G. Fulsom R. Garg V. Gaur A. Garmash A. Giri P. Goldenzweig B. Golob E. Graziani K. Gudkova C. Hadjivasiliou S. Halder K. Hayasaka H. Hayashii M. T. Hedges W.-S. Hou C.-L. Hsu K. Inami N. Ipsita A. Ishikawa R. Itoh M. Iwasaki W. W. Jacobs E.-J. Jang S. Jia Y. Jin A. B. Kaliyar K. H. Kang T. Kawasaki C. Kiesling C. H. Kim D. Y. Kim Y.-K. Kim K. Kinoshita P. Kody\v{s} A. Korobov S. Korpar E. Kovalenko P. Kri\v{z}an P. Krokovny R. Kumar K. Kumara Y.-J. Kwon T. Lam J. S. Lange S. C. Lee P. Lewis L. K. Li Y. Li L. Li Gioi J. Libby K. Lieret Y.-R. Lin D. Liventsev T. Luo M. Masuda T. Matsuda D. Matvienko S. K. Maurya F. Meier M. Merola F. Metzner K. Miyabayashi G. B. Mohanty R. Mussa I. Nakamura T. Nakano M. Nakao Z. Natkaniec A. Natochii L. Nayak M. Nayak N. K. Nisar S. Nishida S. Ogawa H. Ono P. Oskin P. Pakhlov G. Pakhlova S. Pardi H. Park J. Park S. Patra S. Paul R. Pestotnik L. E. Piilonen T. Podobnik E. Prencipe M. T. Prim A. Rostomyan N. Rout G. Russo S. Sandilya L. Santelj V. Savinov G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. E. Sevior W. Shan M. Shapkin C. Sharma C. P. Shen J.-G. Shiu F. Simon A. Sokolov E. Solovieva M. Stari\v{c} M. Sumihama T. Sumiyoshi W. Sutcliffe M. Takizawa U. Tamponi F. Tenchini M. Uchida S. Uehara T. Uglov Y. Unno K. Uno S. Uno P. Urquijo Y. Usov S. E. Vahsen R. van Tonder G. Varner A. Vinokurova A. Vossen D. Wang M.-Z. Wang M. Watanabe S. Watanuki O. Werbycka E. Won X. Xu B. D. Yabsley W. Yan S. B. Yang J. H. Yin C. Z. Yuan L. Yuan Z. P. Zhang V. Zhilich V. Zhukova

This is my paper

classification hep-ex

keywords lambdamathrmmassstatsystfinddatadecay

verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved

0 comments

read the original abstract

Using the data sample of 980 fb$^{-1}$ collected with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we present the results of an investigation of the $\Lambda\pi^+$ and $\Lambda\pi^-$ invariant mass distributions looking for substructure in the decay $\Lambda_c^+\rightarrow\Lambda\pi^+\pi^+\pi^-$. We find a significant signal in each mass dis\ tribution. When interpreted as resonances, we find for the $\Lambda\pi^+$ ($\Lambda\pi^-$) combination a mass of $1434.3 \pm 0.6 (\mathrm{stat}) \pm 0.9(\mathrm{syst})$ MeV/$c^2$ [$1438.5 \pm 0.9 (\mathrm{stat}) \pm 2.5(\mathrm{syst})$ MeV/$c^2$], an intrinsic width of $11.5 \pm 2.8 (\mathrm{stat}) \pm 5.3(\mathrm{syst})$ MeV/$c^2$ [$33.0 \pm 7.5 (\mathrm{stat}) \pm 23.6(\mathrm{syst})$ MeV/$c^2$] with a significance of 7.5$\sigma$ (6.2$\sigma$). As these two signals are very close to the $\bar{K}N$ threshold, we also investigate the possibility of a $\bar{K}N$ cusp, and find that \ we cannot discriminate between these two interpretations due to the limited size of the data sample.

discussion (0)

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

Low-lying $\Lambda$ and $\Sigma$ resonances studied with the forward $K^*$ productions off the proton induced by high-momentum $\pi$ beam
hep-ph 2026-05 unverdicted novelty 7.0

A model combining one-meson exchange with ANL-Osaka DCC amplitudes predicts observables for pi N to K* MB to examine sub-threshold Lambda and Sigma resonances and their overlaps.