Evidence of a new narrow resonance decaying to χ(c1)γ in B→χ(c1)γK

V Bhardwaj; K Miyabayashi; I Adachi; H Aihara; D M Asner; V Aulchenko; T Aushev; T Aziz; A M Bakich; A Bala; B Bhuyan; M Bischofberger; A Bondar; G Bonvicini; A Bozek; M Bračko; J Brodzicka; T E Browder; V Chekelian; A Chen; B G Cheon; K Chilikin; R Chistov; K Cho; V Chobanova; S-K Choi; Y Choi; D Cinabro; J Dalseno; M Danilov; Z Doležal; Z Drásal; A Drutskoy; D Dutta; K Dutta; S Eidelman; D Epifanov; H Farhat; J E Fast; T Ferber; A Frey; V Gaur; N Gabyshev; S Ganguly; R Gillard; Y M Goh; B Golob; J Haba; T Hara; H Hayashii; Y Horii; Y Hoshi; W-S Hou; Y B Hsiung; H J Hyun; T Iijima; K Inami; A Ishikawa; R Itoh; T Iwashita; T Julius; D H Kah; J H Kang; E Kato; T Kawasaki; H Kichimi; C Kiesling; D Y Kim; J B Kim; J H Kim; K T Kim; M J Kim; Y J Kim; K Kinoshita; J Klucar; B R Ko; P Kodyš; S Korpar; P Križan; P Krokovny; R Kumar; T Kumita; A Kuzmin; Y-J Kwon; J S Lange; S-H Lee; J Li; Y Li; C Liu; Z Q Liu; D Liventsev; P Lukin; D Matvienko; H Miyata; R Mizuk; G B Mohanty; A Moll; R Mussa; E Nakano; M Nakao; Z Natkaniec; M Nayak; E Nedelkovska; N K Nisar; S Nishida; O Nitoh; S Ogawa; S Okuno; S L Olsen; P Pakhlov; G Pakhlova; E Panzenböck; H Park; H K Park; T K Pedlar; R Pestotnik; M Petrič; L E Piilonen; M Ritter; M Röhrken; A Rostomyan; H Sahoo; T Saito; K Sakai; Y Sakai; S Sandilya; D Santel; L Santelj; T Sanuki; Y Sato; V Savinov; O Schneider; G Schnell; C Schwanda; R Seidl; D Semmler; K Senyo; O Seon; M E Sevior; M Shapkin; C P Shen; T-A Shibata; J-G Shiu; B Shwartz; F Simon; J B Singh; P Smerkol; Y-S Sohn; A Sokolov; E Solovieva; M Starič; M Steder; M Sumihama; T Sumiyoshi; U Tamponi; K Tanida; G Tatishvili; Y Teramoto; K Trabelsi; T Tsuboyama; M Uchida; S Uehara; T Uglov; Y Unno; P Urquijo; Y Usov; S E Vahsen; C Van Hulse; P Vanhoefer; G Varner; K E Varvell; A Vinokurova; M N Wagner; C H Wang; M-Z Wang; P Wang; M Watanabe; Y Watanabe; E Won; B D Yabsley; J Yamaoka; Y Yamashita; S Yashchenko; Y Yook; C Z Yuan; C C Zhang; Z P Zhang; V Zhilich; V Zhulanov; A Zupanc; Belle Collaboration

doi:10.1103/PhysRevLett.111.032001

Evidence of a new narrow resonance decaying to χ(c1)γ in B→χ(c1)γK

Phys Rev Lett. 2013 Jul 19;111(3):032001. doi: 10.1103/PhysRevLett.111.032001. Epub 2013 Jul 16.

Authors

V Bhardwaj¹, K Miyabayashi, I Adachi, H Aihara, D M Asner, V Aulchenko, T Aushev, T Aziz, A M Bakich, A Bala, B Bhuyan, M Bischofberger, A Bondar, G Bonvicini, A Bozek, M Bračko, J Brodzicka, T E Browder, V Chekelian, A Chen, B G Cheon, K Chilikin, R Chistov, K Cho, V Chobanova, S-K Choi, Y Choi, D Cinabro, J Dalseno, M Danilov, Z Doležal, Z Drásal, A Drutskoy, D Dutta, K Dutta, S Eidelman, D Epifanov, H Farhat, J E Fast, T Ferber, A Frey, V Gaur, N Gabyshev, S Ganguly, R Gillard, Y M Goh, B Golob, J Haba, T Hara, H Hayashii, Y Horii, Y Hoshi, W-S Hou, Y B Hsiung, H J Hyun, T Iijima, K Inami, A Ishikawa, R Itoh, T Iwashita, T Julius, D H Kah, J H Kang, E Kato, T Kawasaki, H Kichimi, C Kiesling, D Y Kim, J B Kim, J H Kim, K T Kim, M J Kim, Y J Kim, K Kinoshita, J Klucar, B R Ko, P Kodyš, S Korpar, P Križan, P Krokovny, R Kumar, T Kumita, A Kuzmin, Y-J Kwon, J S Lange, S-H Lee, J Li, Y Li, C Liu, Z Q Liu, D Liventsev, P Lukin, D Matvienko, H Miyata, R Mizuk, G B Mohanty, A Moll, R Mussa, E Nakano, M Nakao, Z Natkaniec, M Nayak, E Nedelkovska, N K Nisar, S Nishida, O Nitoh, S Ogawa, S Okuno, S L Olsen, P Pakhlov, G Pakhlova, E Panzenböck, H Park, H K Park, T K Pedlar, R Pestotnik, M Petrič, L E Piilonen, M Ritter, M Röhrken, A Rostomyan, H Sahoo, T Saito, K Sakai, Y Sakai, S Sandilya, D Santel, L Santelj, T Sanuki, Y Sato, V Savinov, O Schneider, G Schnell, C Schwanda, R Seidl, D Semmler, K Senyo, O Seon, M E Sevior, M Shapkin, C P Shen, T-A Shibata, J-G Shiu, B Shwartz, F Simon, J B Singh, P Smerkol, Y-S Sohn, A Sokolov, E Solovieva, M Starič, M Steder, M Sumihama, T Sumiyoshi, U Tamponi, K Tanida, G Tatishvili, Y Teramoto, K Trabelsi, T Tsuboyama, M Uchida, S Uehara, T Uglov, Y Unno, P Urquijo, Y Usov, S E Vahsen, C Van Hulse, P Vanhoefer, G Varner, K E Varvell, A Vinokurova, M N Wagner, C H Wang, M-Z Wang, P Wang, M Watanabe, Y Watanabe, E Won, B D Yabsley, J Yamaoka, Y Yamashita, S Yashchenko, Y Yook, C Z Yuan, C C Zhang, Z P Zhang, V Zhilich, V Zhulanov, A Zupanc; Belle Collaboration

Affiliation

¹ Nara Women's University, Nara 630-8506.

PMID: 23909309
DOI: 10.1103/PhysRevLett.111.032001

Abstract

We report measurements of B→χ(c1)γK and χ(c2)γK decays using 772×10(6) BB[over ¯] events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Evidence of a new resonance in the χ(c1)γ final state is found with a statistical significance of 3.8σ. This state has a mass of 3823.1±1.8(stat)±0.7(syst) MeV/c(2), a value that is consistent with theoretical expectations for the previously unseen 1(3)D(2) cc[over ¯] meson. We find no other narrow resonance and set upper limits on the branching fractions of the X(3872)→χ(c1)γ and χ(c2)γ decays.