χ_{c1} and χ_{c2} Resonance Parameters with the Decays χ_{c1,c2}→J/ψμ^{+}μ^{-}.

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Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J ORCID: 0000-0001-8636-1621, Alessio, F, Alexander, M ORCID: 0000-0002-8148-2392, Alfonso Albero, A, Ali, S et al (show 794 more authors) , Alkhazov, G, Alvarez Cartelle, P ORCID: 0000-0003-1652-2834, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, d'Argent, P, Arnau Romeu, J, Artamonov, A, Artuso, M ORCID: 0000-0002-5991-7273, Aslanides, E, Atzeni, M, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baker, S, Balagura, V, Baldini, W, Baranov, A, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Baryshnikov, F, Batozskaya, V, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F ORCID: 0000-0002-8315-2119, Bediaga, I, Beiter, A, Bel, LJ, Beliy, N, Bellee, V ORCID: 0000-0001-5314-0953, Belloli, N, Belous, K ORCID: 0000-0003-0014-2589, Belyaev, I ORCID: 0000-0002-7458-7030, Ben-Haim, E, Bencivenni, G, 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0000-0002-5865-0677, Waldi, R, Wallace, C, Wallace, R, Walsh, J, Wang, J, Ward, DR, Wark, HM ORCID: 0000-0002-5177-9136, Watson, NK ORCID: 0000-0002-8142-4678, Websdale, D, Weiden, A, Weisser, C, Whitehead, M, Wicht, J, Wilkinson, G, Wilkinson, M, Williams, M, Williams, MP, Williams, M, Williams, T, Wilson, FF ORCID: 0000-0002-5552-0842, Wimberley, J, Winn, M ORCID: 0000-0002-2207-0101, Wishahi, J, Wislicki, W ORCID: 0000-0001-5765-6308, Witek, M ORCID: 0000-0002-8317-385X, Wormser, G, Wotton, SA, Wraight, K, Wyllie, K, Xie, Y, Xu, M, Xu, Z, Yang, Z, Yang, Z, Yao, Y, Yin, H, Yu, J, Yuan, X, Yushchenko, O, Zarebski, KA, Zavertyaev, M, Zhang, L, Zhang, Y, Zhelezov, A, Zheng, Y, Zhu, X, Zhukov, V, Zonneveld, JB, Zucchelli, S and LHCb Collaboration, ORCID: 0000-0003-2000-6306 (2017) χ_{c1} and χ_{c2} Resonance Parameters with the Decays χ_{c1,c2}→J/ψμ^{+}μ^{-}. Physical review letters, 119 (22). 221801-.

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Abstract

The decays χ_{c1}→J/ψμ^{+}μ^{-} and χ_{c2}→J/ψμ^{+}μ^{-} are observed and used to study the resonance parameters of the χ_{c1} and χ_{c2} mesons. The masses of these states are measured to be m(χ_{c1})=3510.71±0.04(stat)±0.09(syst)  MeV and m(χ_{c2})=3556.10±0.06(stat)±0.11(syst)  MeV, where the knowledge of the momentum scale for charged particles dominates the systematic uncertainty. The momentum-scale uncertainties largely cancel in the mass difference m(χ_{c2})-m(χ_{c1})=45.39±0.07(stat)±0.03(syst)  MeV. The natural width of the χ_{c2} meson is measured to be Γ(χ_{c2})=2.10±0.20(stat)±0.02(syst)  MeV. These results are in good agreement with and have comparable precision to the current world averages.

Item Type:	Article
Additional Information:	17 pages, 2 figures, 3 tables. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-036.html"
Uncontrolled Keywords:	LHCb Collaboration
Depositing User:	Symplectic Admin
Date Deposited:	12 Jan 2018 10:56
Last Modified:	14 Mar 2024 23:35
DOI:	10.1103/physrevlett.119.221801
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3015924