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arxiv: 2206.09440 · v4 · pith:556BI44Anew · submitted 2022-06-19 · ✦ hep-ex

Two-particle angular correlations in e^+ e^- collisions to hadronic final states in two reference coordinates at Belle

Belle Collaboration: Y.-C. Chen , Y.-J. Lee , P. Chang , I. Adachi , H. Aihara , S. Al Said , D. M. Asner , H. Atmacan
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V. Aulchenko T. Aushev R. Ayad V. Babu P. Behera K. Belous J. Bennett M. Bessner V. Bhardwaj B. Bhuyan T. Bilka D. Bodrov G. Bonvicini J. Borah A. Bozek M. Bra\v{c}ko P. Branchini A. Budano M. Campajola D. \v{C}ervenkov M.-C. Chang V. Chekelian B. G. Cheon K. Chilikin H. E. Cho K. Cho S.-J. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Das G. De Pietro R. Dhamija F. Di Capua J. Dingfelder Z. Dole\v{z}al T. V. Dong D. Epifanov T. Ferber D. Ferlewicz B. G. Fulsom R. Garg V. Gaur N. Gabyshev A. Garmash A. Giri P. Goldenzweig E. Graziani T. Gu C. Hadjivasiliou K. Hayasaka H. Hayashii M. T. Hedges D. Herrmann W.-S. Hou C.-L. Hsu K. Inami N. Ipsita A. Ishikawa R. Itoh M. Iwasaki W. W. Jacobs E.-J. Jang S. Jia Y. Jin K. K. Joo K. H. Kang G. Karyan T. Kawasaki C. Kiesling C. H. Kim D. Y. Kim K.-H. Kim Y.-K. Kim P. Kody\v{s} A. Korobov S. Korpar E. Kovalenko P. Kri\v{z}an P. Krokovny M. Kumar R. Kumar K. Kumara Y.-J. Kwon T. Lam J. S. Lange S. C. Lee J. Li L. K. Li Y. Li Y. B. Li L. Li Gioi J. Libby C.-W. Lin K. Lieret D. Liventsev M. Masuda T. Matsuda S. K. Maurya F. Meier M. Merola K. Miyabayashi R. Mizuk G. B. Mohanty M. Mrvar R. Mussa M. Nakao Z. Natkaniec A. Natochii M. Nayak N. K. Nisar S. Nishida S. Ogawa H. Ono Y. Onuki P. Oskin G. Pakhlova S. Pardi H. Park S.-H. Park S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik E. Prencipe M. T. Prim N. Rout G. Russo S. Sandilya A. Sangal L. Santelj V. Savinov G. Schnell C. Schwanda R. Seidl Y. Seino K. Senyo M. E. Sevior M. Shapkin C. Sharma C. P. Shen J.-G. Shiu E. Solovieva M. Stari\v{c} Z. S. Stottler J. F. Strube M. Sumihama T. Sumiyoshi M. Takizawa U. Tamponi K. Tanida F. Tenchini K. Trabelsi M. Uchida T. Uglov Y. Unno K. Uno S. Uno P. Urquijo R. van Tonder G. Varner A. Vinokurova A. Vossen E. Waheed E. Wang M.-Z. Wang X. L. Wang M. Watanabe S. Watanuki E. Won W. Yan S. B. Yang J. H. Yin C. Z. Yuan Y. Yusa Y. Zhai Z. P. Zhang V. Zhilich V. Zhukova
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keywords bellecorrelationtwo-particleangularaxiscollisioncollisionscorrelations
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We present the analysis of two-particle angular correlations using coordinate systems defined with the conventional beam axis and the event thrust axis, and propose the latter to be a useful representation for the correlation structure interpretation in the $e^+ e^-$ collision system. The $e^+ e^-$ collisions to hadronic final states at center-of-mass energies of $\sqrt{s} = 10.52$ GeV and $10.58$ GeV are recorded by the Belle detector at KEKB. In this paper, results on the first dataset are supplementary to the previous Belle publication arXiv:2201.01694 while the latter one is the first two-particle correlation measurement at a collision energy on the $\Upsilon(4S)$ resonance and sensitive to its decay products. Measurements are reported as a function of the charged-particle multiplicity. Finally, a qualitative understanding of the correlation structure is discussed using a combination of Monte Carlo simulations and experimental data.

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