Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.122001
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Funding
- MEXT
- JSPS
- Nagoya's TLPRC (Japan)
- ARC and DIISR (Australia)
- NSFC (China)
- MSMT (Czechia)
- DST (India)
- MEST
- NRF
- NSDC of KISTI
- WCU (Korea)
- MNiSW (Poland)
- MES and RFAAE (Russia)
- ARRS (Slovenia)
- SNSF (Switzerland)
- NSC and MOE (Taiwan)
- DOE and NSF (USA)
- National Research Foundation of Korea [2011-0029457] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Grants-in-Aid for Scientific Research [21105002] Funding Source: KAKEN
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We report the observation of two narrow structures in the mass spectra of the pi(+/-) Y(nS) (n = 1, 2, 3) and pi(+/-) h(b)(mP) (m = 1, 2) pairs that are produced in association with a single charged pion in Y(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M-1 = (10 607.2 +/- 2.0) MeV/c(2), Gamma(1) =(18.4 +/- 2.4) MeV, and M-2 = (10 652.2 +/- 1.5) MeV/c(2), Gamma(2) = (11.5 +/- 2.2) MeV. The results are obtained with a 121.4 fb(-1) data sample collected with the Belle detector in the vicinity of the Y(5S) resonance at the KEKB asymmetric-energy e(+)e(-) collider.
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