Measurement of the mass and width of the Λ_c⁢(2625)⁺ charmed baryon and the branching ratios of Λ_c⁢(2625)⁺ → Σ$$^{0}_{c}$$π⁺ and Λ_c⁢(2625)⁺ → Σ$$^{++}_{c}$$π^-

Journal Article · Tue Feb 21 00:00:00 EST 2023 · Physical Review. D.

DOI:https://doi.org/10.1103/physrevd.107.032008· OSTI ID:2424169

Wang, D.; Yelton, J.; Adachi, I.; Ahn, J.  K.; Aihara, H.; Asner, D.  M.; Atmacan, H.; Ayad, R.; Babu, V.; Banerjee, Sw; Bauer, M.; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bilka, T.; Biswas, D.; Bodrov, D.; Borah, J.; Bozek, A. ; Bračko, M.; Branchini, P.; Browder, T.  E.; Budano, A.; Campajola, M.; Červenkov, D.; Chang, M. -C.; Chen, A.; Cheon, B.  G.; Cho, H.  E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Das, S.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Doležal, Z.; Dong, T.  V.; Dossett, D.; Epifanov, D.; Ferber, T.; Ferlewicz, D.; Fulsom, B.  G.; Garg, R.; Gaur, V.; Giri, A.; Goldenzweig, P.; Graziani, E.; Gu, T.; Gudkova, K.; Hadjivasiliou, C.; Han, X.; Hayasaka, K.; Hayashii, H.; Hedges, M.  T.; Hsu, C. -L.; Inami, K.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W.  W.; Jang, E. -J.; Jia, S.; Jin, Y.; Kaliyar, A.  B.; Kang, K.  H.; Kawasaki, T.; Kiesling, C.; Kim, C.  H.; Kim, D.  Y.; Kim, K. -H.; Kim, Y. -K.; Kinoshita, K.; Kodyš, P.; Korobov, A.; Korpar, S.; Kovalenko, E.; Križan, P.; Krokovny, P.; Kumar, M.; Kumar, R.; Kumara, K.; Kwon, Y. -J.; Lam, T.; Lange, J.  S.; Lee, S.  C.; Levit, D.; Lewis, P.; Li, L.  K.; Li, Y.; Li, Y.  B.; Li Gioi, L.; Libby, J.; Lieret, K.; Lin, Y. -R.; Liventsev, D.; Matsuda, T.; Matvienko, D.; Meier, F.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G.  B.; Mussa, R.; Nakamura, I.; Nakano, T.; Nakao, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nayak, M.; Nisar, N.  K.; Nishida, S.; Ogawa, S.; Ono, H.; Oskin, P.; Pakhlova, G.; Pardi, S.; Park, H.; Park, J.; Patra, S.; Paul, S.; Pedlar, T.  K.; Pestotnik, R.; Piilonen, L.  E.; Podobnik, T.; Prencipe, E.; Prim, M.  T.; Rout, N.; Russo, G.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V.; Schnell, G.; Schueler, J.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M.  E.; Shan, W.; Shapkin, M.; Sharma, C.; Shen, C.  P.; Shiu, J. -G.; Sokolov, A.; Solovieva, E.; Starič, M.; Sumihama, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Uchida, M.; Uno, S.; van Tonder, R.; Varner, G.; Varvell, K.  E.; Vinokurova, A.; Wang, M. -Z.; Wang, X.  L.; Watanabe, M.; Watanuki, S.; Werbycka, O.; Won, E.; Xu, X.; Yabsley, B.  D.; Yan, W.; Yang, S.  B.; Yin, J.  H.; Yuan, C.  Z.; Yuan, L.; Zhang, Z.  P.; Zhilich, V.; Zhukova, V.

Using the entire data sample of 980 fb^-1 collected at or near the Y⁡(4⁢S) resonance with the Belle detector operating at the KEKB asymmetric-energy e⁺⁢e^- collider, we report the measurement of the mass, width, and the branching ratios of the Λ_c(2625)⁺ charmed baryon. The mass difference between Λ_c⁢(2625)⁺ and Λ$$^{+}_{c}$$ is measured to be M⁡(Λ_c⁢(2625)⁺)-M⁡(Λ$$^{+}_{c}$$)=341.518±0.006±0.049 MeV/c². The upper limit on the width is measured to be Γ⁡(Λ_c⁢(2625)⁺)<0.52 MeV/c² at 90% confidence level. Based on a full Dalitz plot fit, branching ratios with respect to the mode Λ_c⁢(2625)⁺→Λ$$^{+}_{c}$$π⁺⁢π^- are measured to be $$\frac{\mathscr{B}⁡(Λ_c(2625)^+ → Σ^{0}_{c}π^+)} {\mathscr{B}⁡(Λ_c(2625)^+ → ^{+}_{c}⁢π^+⁢π^-)}$$ = (5.19±0.23±0.40)% and $$\frac{\mathscr{B}(Λ_c (2625)^+ → Σ{_c^+}^+ π^-)}{\mathscr{B}(Λ_c (2625)^+ → Λ{_c^+} π^+π^-)}$$ = (5.13±0.26±0.32)%, where the first and second uncertainties are statistical and systematic, respectively. These measurements can be used to further constrain the parameters of the underlying theoretical models.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• Contributing Organization: Belle Collaboration
• Grant/Contract Number: AC05-76RL01830
• OSTI ID: 2424169
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 3 Vol. 107; ISSN 2470-0010
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Charmed baryons
Particle decays
Particle properties