학술논문
First measurement of the Λ c + $$ {\Lambda}_c^{+} $$ → pη′ decay
Document Type
article
Author
The BELLE collaboration; S. X. Li; J. X. Cui; C. P. Shen; I. Adachi; H. Aihara; S. Al Said; D. M. Asner; H. Atmacan; T. Aushev; R. Ayad; V. Babu; P. Behera; K. Belous; M. Bessner; V. Bhardwaj; B. Bhuyan; T. Bilka; D. Bodrov; G. Bonvicini; J. Borah; A. Bozek; M. Bračko; P. Branchini; T. E. Browder; A. Budano; M. Campajola; D. Červenkov; M.-C. Chang; P. Chang; V. Chekelian; 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. Cunliffe; S. Das; N. Dash; G. De Nardo; G. De Pietro; R. Dhamija; F. Di Capua; Z. Doležal; T. V. Dong; D. Epifanov; T. Ferber; D. Ferlewicz; B. G. Fulsom; R. Garg; V. Gaur; N. Gabyshev; A. Giri; P. Goldenzweig; B. Golob; E. Graziani; T. Gu; T. Hara; K. Hayasaka; H. Hayashii; W.-S. Hou; K. Inami; A. Ishikawa; M. Iwasaki; Y. Iwasaki; W. W. Jacobs; E.-J. Jang; S. Jia; Y. Jin; K. K. Joo; J. Kahn; A. B. Kaliyar; K. H. Kang; Y. Kato; T. Kawasaki; H. Kichimi; C. Kiesling; C. H. Kim; D. Y. Kim; Y.-K. Kim; K. Kinoshita; P. Kodyš; T. Konno; A. Korobov; S. Korpar; E. Kovalenko; P. Križan; R. Kroeger; P. Krokovny; M. Kumar; R. Kumar; K. Kumara; Y.-J. Kwon; T. Lam; M. Laurenza; S. C. Lee; J. Li; L. K. Li; Y. Li; L. Li Gioi; J. Libby; D. Liventsev; A. Martini; M. Masuda; T. Matsuda; D. Matvienko; S. K. Maurya; F. Meier; M. Merola; K. Miyabayashi; R. Mizuk; R. Mussa; M. Nakao; D. Narwal; Z. Natkaniec; A. Natochii; L. Nayak; N. K. Nisar; S. Nishida; K. Nishimura; K. Ogawa; S. Ogawa; H. Ono; P. Oskin; P. Pakhlov; G. Pakhlova; T. Pang; S. Pardi; S.-H. Park; S. Patra; T. K. Pedlar; R. Pestotnik; L. E. Piilonen; T. Podobnik; V. Popov; M. T. Prim; M. Röhrken; A. Rostomyan; N. Rout; G. Russo; D. Sahoo; S. Sandilya; A. Sangal; T. Sanuki; V. Savinov; G. Schnell; J. Schueler; C. Schwanda; A. J. Schwartz; Y. Seino; K. Senyo; M. E. Sevior; M. Shapkin; C. Sharma; V. Shebalin; J.-G. Shiu; B. Shwartz; F. Simon; E. Solovieva; S. Stanič; M. Starič; Z. S. Stottler; M. Sumihama; K. Sumisawa; T. Sumiyoshi; W. Sutcliffe; M. Takizawa; U. Tamponi; K. Tanida; F. Tenchini; K. Trabelsi; M. Uchida; Y. Unno; K. Uno; S. Uno; P. Urquijo; S. E. Vahsen; R. Van Tonder; G. Varner; A. Vinokurova; E. Waheed; D. Wang; E. Wang; M.-Z. Wang; S. Watanuki; E. Won; X. Xu; B. D. Yabsley; W. Yan; H. Ye; J. H. Yin; Y. Yusa; Y. Zhai; V. Zhilich; V. Zhukova
Source
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-15 (2022)
Subject
Language
English
ISSN
1029-8479
Abstract
Abstract We present the first measurement of the branching fraction of the singly Cabibbo-suppressed (SCS) decay Λ c + $$ {\Lambda}_c^{+} $$ → pη′ with η′ → ηπ + π − , using a data sample corresponding to an integrated luminosity of 981 fb −1, collected by the Belle detector at the KEKB e + e − asymmetric-energy collider. A significant Λ c + $$ {\Lambda}_c^{+} $$ → pη′ signal is observed for the first time with a signal significance of 5.4σ. The relative branching fraction with respect to the normalization mode Λ c + $$ {\Lambda}_c^{+} $$ → pK − π + is measured to be B Λ c + → pη ′ B Λ c + → pK − π + = 7.54 ± 1.32 ± 0.73 × 10 − 3 , $$ \frac{\mathcal{B}\left({\Lambda}_c^{+}\to p\eta^{\prime}\right)}{\mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right)}=\left(7.54\pm 1.32\pm 0.73\right)\times {10}^{-3}, $$ where the uncertainties are statistical and systematic, respectively. Using the world-average value of B Λ c + → pK − π + $$ \mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right) $$ = (6.28 ± 0.32) × 10 −2, we obtain B Λ c + → pη ′ = 4.73 ± 0.82 ± 0.46 ± 0.24 × 10 − 4 , $$ \mathcal{B}\left({\Lambda}_c^{+}\to p\eta^{\prime}\right)=\left(4.73\pm 0.82\pm 0.46\pm 0.24\right)\times {10}^{-4}, $$ where the uncertainties are statistical, systematic, and from B Λ c + → pK − π + $$ \mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right) $$ , respectively.