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23 April 2024

» arxiv » 1301.6183

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Precision measurement of charged pion and kaon multiplicities in electron-positron annihilation at Q = 10.52 GeV
Belle Collaboration ; M. Leitgab ; R. Seidl ; M. Grosse Perdekamp ; A. Vossen ; I. Adachi ; H. Aihara ; D. M. Asner ; V. Aulchenko ; T. Aushev ; A. M. Bakich ; B. Bhuyan ; A. Bondar ; A. Bozek ; M. Bračko ; J. Brodzicka ; T. E. Browder ; V. Chekelian ; A. Chen ; P. Chen ; B. G. Cheon ; K. Chilikin ; K. Cho ; V. Chobanova ; Y. Choi ; D. Cinabro ; J. Dalseno ; Z. Drásal ; D. Dutta ; S. Eidelman ; D. Epifanov ; H. Farhat ; J. E. Fast ; V. Gaur ; N. Gabyshev ; R. Gillard ; F. Giordano ; Y. M. Goh ; B. Golob ; J. Haba ; K. Hayasaka ; H. Hayashii ; Y. Hoshi ; W.-S. Hou ; Y. B. Hsiung ; H. J. Hyun ; T. Iijima ; A. Ishikawa ; R. Itoh ; W. W. Jacobs ; T. Julius ; J. H. Kang ; P. Kapusta ; E. Kato ; T. Kawasaki ; H. J. Kim ; H. O. Kim ; J. B. Kim ; J. H. Kim ; M. J. Kim ; J. Klucar ; B. R. Ko ; P. Kodyš ; R. T. Kouzes ; P. Križan ; P. Krokovny ; R. Kumar ; T. Kumita ; Y.-J. Kwon ; J. S. Lange ; S.-H. Lee ; Y. Li ; Z. Q. Liu ; D. Liventsev ; D. Matvienko ; K. Miyabayashi ; H. Miyata ; R. Mizuk ; A. Moll ; N. Muramatsu ; E. Nakano ; M. Nakao ; Z. Natkaniec ; M. Nayak ; E. Nedelkovska ; C. Ng ; N. Nellikunnummel ; O. Nitoh ; A. Ogawa ; S. Ogawa ; T. Ohshima ; S. Okuno ; S. L. Olsen ; C. Oswald ; P. Pakhlov ; H. Park ; H. K. Park ; T. K. Pedlar ; R. Pestotnik ; M. Petrič ; L. E. Piilonen ; M. Röhrken ; H. Sahoo ; Y. Sakai ; S. Sandilya ; L. Santelj ; T. Sanuki ; Y. Sato ; O. Schneider ; G. Schnell ; C. Schwanda ; K. Senyo ; O. Seon ; M. E. Sevior ; M. Shapkin ; C. P. Shen ; T.-A. Shibata ; J.-G. Shiu ; B. Shwartz ; A. Sibidanov ; F. Simon ; P. Smerkol ; Y.-S. Sohn ; A. Sokolov ; E. Solovieva ; M. Starič ; M. Sumihama ; T. Sumiyoshi ; G. Tatishvili ; Y. Teramoto ; T. Tsuboyama ; M. Uchida ; T. Uglov ; Y. Unno ; S. Uno ; Y. Usov ; C. Van Hulse ; G. Varner ; V. Vorobyev ; M. N. Wagner ; C. H. Wang ; J. Wang ; M.-Z. Wang ; P. Wang ; M. Watanabe ; Y. Watanabe ; K. M. Williams ; E. Won ; Y. Yamashita ; V. Zhilich ; V. Zhulanov ;
Date:	25 Jan 2013
Abstract:	Precise measurements of inclusive multiplicities of charged pions and kaons produced in electron-positron annihilation have been carried out at a center-of-mass energy of 10.52 GeV. The measurements were performed with the Belle detector at the KEKB electron-positron collider using a data sample containing 113 million e+e- -> qqbar events, where q={u,d,s,c}. We present charge-integrated multiplicities 1/N_evts * dN_h+-/dz for h+- = pi+-, K+- as a function of the relative hadron energy z = 2*E_h / sqrt{s} from 0.2 to 0.98 (0.97) for pions (kaons). The combined statistical and systematic uncertainties for pi+- (K+-) are 4% (5%) at z ~ 0.6 and 18% (51%) at z ~ 0.9. The multiplicities are the first measurements of the z-dependence of pion and kaon multiplicities for z > 0.7 as well as the first precision multiplicity measurements at a center-of-mass energy far below the Z^0 resonance used by the experiments at LEP and SLC.
Source:	arXiv, 1301.6183
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