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Observation of B^{0}→pΛ[over ¯]D^{(*)-}.

Publication ,  Journal Article
Chang, Y-Y; Wang, M-Z; Abdesselam, A; Adachi, I; Adamczyk, K; Aihara, H; Al Said, S; Asner, DM; Atmacan, H; Aushev, T; Babu, V; Badhrees, I ...
Published in: Physical review letters
November 2015

We report the first observation of the decays B^{0}→pΛ[over ¯]D^{(*)-}. The data sample of 711  fb^{-1} used in this analysis corresponds to 772×10^{6} BB[over ¯] pairs, collected at the ϒ(4S) resonance by the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We observe 19.8σ and 10.8σ excesses of events for the two decay modes and measure the branching fractions of B^{0}→pΛ[over ¯]D^{-} and B^{0}→pΛ[over ¯]D^{*-} to be (25.1±2.6±3.5)×10^{-6} and (33.6±6.3±4.4)×10^{-6}, respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the dibaryon (pΛ[over ¯]) system is observed, consistent with that observed in similar B decays.

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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

November 2015

Volume

115

Issue

22

Start / End Page

221803

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Chang, Y.-Y., Wang, M.-Z., Abdesselam, A., Adachi, I., Adamczyk, K., Aihara, H., … Belle Collaboration, . (2015). Observation of B^{0}→pΛ[over ¯]D^{(*)-}. Physical Review Letters, 115(22), 221803. https://doi.org/10.1103/physrevlett.115.221803
Chang, Y. -. Y., M. -. Z. Wang, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, et al. “Observation of B^{0}→pΛ[over ¯]D^{(*)-}.Physical Review Letters 115, no. 22 (November 2015): 221803. https://doi.org/10.1103/physrevlett.115.221803.
Chang Y-Y, Wang M-Z, Abdesselam A, Adachi I, Adamczyk K, Aihara H, et al. Observation of B^{0}→pΛ[over ¯]D^{(*)-}. Physical review letters. 2015 Nov;115(22):221803.
Chang, Y. .. Y., et al. “Observation of B^{0}→pΛ[over ¯]D^{(*)-}.Physical Review Letters, vol. 115, no. 22, Nov. 2015, p. 221803. Epmc, doi:10.1103/physrevlett.115.221803.
Chang Y-Y, Wang M-Z, Abdesselam A, Adachi I, Adamczyk K, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Babu V, Badhrees I, Bakich AM, Barberio E, Bhuyan B, Biswal J, Bobrov A, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Chistov R, Chobanova V, Choi S-K, Choi Y, Cinabro D, Dalseno J, Danilov M, Dingfelder J, Doležal Z, Drásal Z, Dutta D, Eidelman S, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Ganguly S, Garmash A, Gillard R, Glattauer R, Goh YM, Goldenzweig P, Greenwald D, Grzymkowska O, Haba J, Hayasaka K, Hayashii H, He XH, Hou W-S, Hsu C-L, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaegle I, Joffe D, Joo KK, Kawasaki T, Kim DY, Kim HJ, Kim JB, Kim JH, Kim KT, Kim MJ, Kim SH, Kim YJ, Kinoshita K, Korpar S, Križan P, Krokovny P, Kuhr T, Kumita T, Kuzmin A, Kwon Y-J, Lai Y-T, Lee IS, Li L, Li Y, Libby J, Liventsev D, Lukin P, Masuda M, Matvienko D, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohanty GB, Mohanty S, Moll A, Moon HK, Mori T, Nakano E, Nakao M, Nanut T, Nayak M, Nishida S, Ogawa S, Ozaki H, Pakhlov P, Pakhlova G, Pal B, Park CW, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Rauch J, Ribežl E, Ritter M, Rostomyan A, Ryu S, Sahoo H, Sakai Y, Sandilya S, Santelj L, Sanuki T, Savinov V, Schneider O, Schnell G, Schwanda C, Seino Y, Senyo K, Seong IS, Sevior ME, Shebalin V, Shen CP, Shibata T-A, Shiu J-G, Simon F, Sohn Y-S, Starič M, Stypula J, Sumihama M, Sumisawa K, Sumiyoshi T, Tamponi U, Tanida K, Teramoto Y, Uglov T, Unno Y, Uno S, Usov Y, Van Hulse C, Vanhoefer P, Varner G, Vorobyev V, Vossen A, Wagner MN, Wang CH, Wang P, Watanabe M, Watanabe Y, Williams KM, Won E, Yamaoka J, Yashchenko S, Yelton J, Yusa Y, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A, Belle Collaboration. Observation of B^{0}→pΛ[over ¯]D^{(*)-}. Physical review letters. 2015 Nov;115(22):221803.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

November 2015

Volume

115

Issue

22

Start / End Page

221803

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences