First measurement of the \( {\Lambda}_c^{+} \) → pη' decay
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We present the first measurement of the branching fraction of the singly Cabibbo-suppressed (SCS) decay \( {\Lambda}_c^{+} \) → 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 \( {\Lambda}_c^{+} \) → 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 \( {\Lambda}_c^{+} \) → pK–π+ is measured to be$$$$ \frac{\mathcal{B}\left({\Lambda}_c^{+}\to p\eta^{\prime}\right)}{\mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right)}=\left(7.54\pm 1.32\pm 0.73\right)\times {10}^{-3}, $$$$where the uncertainties are statistical and systematic, respectively. Using the world-average value of \( \mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right) \) = (6.28 ± 0.32) × 10–2, we obtain$$$$ \mathcal{B}\left({\Lambda}_c^{+}\to p\eta^{\prime}\right)=\left(4.73\pm 0.82\pm 0.46\pm 0.24\right)\times {10}^{-4}, $$$$where the uncertainties are statistical, systematic, and from \( \mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right) \), respectively.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); Australian Research Council (ARC); Austrian Science Fund (FWF); National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences; Shanghai Science and Technology Committee (STCSM); Ministry of Education, Youth and Sports of the Czech Republic; European Research Council (ERC); National Research Foundation of Korea (NRF); Ministry of Science and Higher Education of the Russian Federation; University of Tabuk; Slovenian Research Agency
- Contributing Organization:
- BELLE collaboration
- Grant/Contract Number:
- SC0012704; DP180102629; DP170102389; DP170102204; DP150103061; FT130100303; 31361-N36; 11475187; 11521505; 11575017; 11675166; 11705209; 12005040; 11761141009; 11975076; 12042509; 12135005; 12161141008; QYZDJ-SSW-SLH011; 19ZR1403000; LTT17020; 884719; 2016R1D1A1B01010135; 2016R1D1A1B02012900; 2018R1A2B3003643; 2018R1A6A1A06024970; 2019K1A3A7A09033840; 2019R1I1A3A01058933; 2021R1A6A1A03043957; 2021R1F1A1060423; 2021R1F1A1064008; 14.W03.31.0026; S-1440-0321; S-0256-1438; S-0280-1439; J1-9124; P1-0135
- OSTI ID:
- 1863879
- Report Number(s):
- BNL-222924-2022-JAAM; TRN: US2305664
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2022, Issue 3; ISSN 1029-8479
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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