Evidence for a new resonance and search for the Y(4140) in the γγ→φJ/ψ process

CP Shen; CZ Yuan; H Aihara; K Arinstein; T Aushev; AM Bakich; V Balagura; E Barberio; A Bay; K Belous; V Bhardwaj; M Bischofberger; M Bračko; TE Browder; MC Chang; P Chang; A Chen; P Chen; BG Cheon; CC Chiang; IS Cho; Y Choi; J Dalseno; A Das; Z Doležal; A Drutskoy; S Eidelman; D Epifanov; N Gabyshev; B Golob; H Ha; J Haba; BY Han; K Hayasaka; H Hayashii; Y Horii; Y Hoshi; WS Hou; YB Hsiung; HJ Hyun; K Inami; R Itoh; M Iwabuchi; M Iwasaki; Y Iwasaki; NJ Joshi; T Julius; JH Kang; T Kawasaki; C Kiesling; HJ Kim; HO Kim; JH Kim; SK Kim; YI Kim; YJ Kim; BR Ko; P Kodyš; S Korpar; M Kreps; P Križan; P Krokovny; T Kuhr; YJ Kwon; SH Kyeong; JS Lange; MJ Lee; SH Lee; J Li; C Liu; Y Liu; D Liventsev; R Louvot; A Matyja; S McOnie; K Miyabayashi; H Miyata; Y Miyazaki; T Mori; R Mussa; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Neubauer; S Nishida; K Nishimura; O Nitoh; T Ohshima; S Okuno; SL Olsen; G Pakhlova; CW Park; H Park; HK Park; R Pestotnik; M Petrič; LE Piilonen; M Röhrken; S Ryu

Journal article

Evidence for a new resonance and search for the Y(4140) in the γγ→φJ/ψ process

CP Shen, CZ Yuan, H Aihara, K Arinstein, T Aushev, AM Bakich, V Balagura, E Barberio, A Bay, K Belous, V Bhardwaj, M Bischofberger, M Bračko, TE Browder, MC Chang, P Chang, A Chen, P Chen, BG Cheon, CC Chiang Show all

Physical Review Letters | Published : 2010

DOI: 10.1103/PhysRevLett.104.112004

Abstract

The process γγ→φ/ψ is measured using a data sample of 825fb-1 collected with the Belle detector. A narrow peak of 8.8-3.2+4.2 events, with a significance of 3.2 standard deviations including systematic uncertainty, is observed. The mass and natural width of the structure [named X(4350)] are measured to be [4350.6-5.1+4.6(stat)±0.7(syst)]MeV/ c2 and [13-9+18(stat)±4(syst)]MeV, respectively. The product of its two-photon decay width and branching fraction to φJ/ψ is [6.7-2.4+3.2(stat)±1.1(syst)]eV for JP=0+, or [1.5-0.6+0.7(stat)±0.3(syst)]eV for JP=2+. No signal for the Y(4140)→φJ/ψ structure reported by the CDF Collaboration in B→K+φJ/ψ decays is observed, and limits of Γγγ(Y(4140))B(Y(4140)..

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University of Melbourne Researchers

Elisabetta Barberio Author

Martin Sevior Author

Phillip Urquijo Author

Grants

Funding Acknowledgements

We thank the KEKB group for excellent operation of the accelerator, the KEK cryogenics group for efficient solenoid operations, and the KEK computer group and the NII for valuable computing and SINET3 network support. We acknowledge support from MEXT, JSPS, and Nagoya's TLPRC (Japan); ARC and DIISR (Australia); NSFC (China); DST (India); MEST, KOSEF, KRF (Korea); MNiSW (Poland); MES and RFAAE (Russia); ARRS (Slovenia); SNSF (Switzerland); NSC and MOE (Taiwan); and DOE (USA).