Azimuthal asymmetries of back-to-back π±- (π0, η, π±) pairs in e+e- annihilation

(Belle Collaboration)

doi:10.1103/PhysRevD.100.092008

Azimuthal asymmetries of back-to-back π±- (π0, η, π±) pairs in e+e- annihilation

(Belle Collaboration)

Department of Physics

Indiana University Bloomington
Duke University
The University of Tokyo
Brookhaven National Laboratory
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Moscow Institute of Physics and Technology
German Electron Synchrotron
King Abdulaziz City for Science and Technology
University of Tabuk
The University of Sydney
University of Mississippi
Indian Institute of Science Education and Research Mohali
Charles University
Jožef Stefan Institute
University of Maribor
National Institute for Nuclear Physics
University of Naples Federico II
Karlsruhe Institute of Technology
Max Planck Institute for Physics (Werner Heisenberg Institute)
National Central University
Hanyang University
Korea Institute of Science and Technology Information
Sungkyunkwan University
Indian Institute of Technology Hyderabad
Wayne State University
Université Paris-Sud
The Graduate University for Advanced Studies
High Energy Accelerator Research Organization, Tsukuba
RAS - P.N. Lebedev Physics Institute
Pacific Northwest National Laboratory
Virginia Polytechnic Institute and State University
University of Hawai'i at Mānoa
Niigata University
Nara Women's University
National Taiwan University
Nagoya University
Osaka Metropolitan University
Gyeongsang National University
Beihang University

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

This work reports the first observation of azimuthal asymmetries around the thrust axis in e+e- annihilation of pairs of back-to-back charged pions in one hemisphere, and π0 and η mesons in the opposite hemisphere. These results are complemented by a new analysis of pairs of back-to-back charged pions. The π0 and η asymmetries rise with the relative momentum z of the detected hadrons as well as with the transverse momentum with respect to the thrust axis. These asymmetries are sensitive to the Collins fragmentation function H1¥ and provide complementary information to previous measurements with charged pions and kaons in the final state. In particular, the η final states will provide additional information on the flavor structure of H1¥. This is the first measurement of the explicit transverse-momentum dependence of the Collins fragmentation function from Belle data. It uses a dataset of 980.4 fb-1 collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV.

Original language	English
Article number	092008
Journal	Physical Review D
Volume	100
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.100.092008
State	Published - 27 Nov 2019

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10.1103/PhysRevD.100.092008

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@article{059fe0033a0d404bb46e43354a896b1c,

title = "Azimuthal asymmetries of back-to-back π±- (π0, η, π±) pairs in e+e- annihilation",

abstract = "This work reports the first observation of azimuthal asymmetries around the thrust axis in e+e- annihilation of pairs of back-to-back charged pions in one hemisphere, and π0 and η mesons in the opposite hemisphere. These results are complemented by a new analysis of pairs of back-to-back charged pions. The π0 and η asymmetries rise with the relative momentum z of the detected hadrons as well as with the transverse momentum with respect to the thrust axis. These asymmetries are sensitive to the Collins fragmentation function H1¥ and provide complementary information to previous measurements with charged pions and kaons in the final state. In particular, the η final states will provide additional information on the flavor structure of H1¥. This is the first measurement of the explicit transverse-momentum dependence of the Collins fragmentation function from Belle data. It uses a dataset of 980.4 fb-1 collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV.",

author = "\{(Belle Collaboration)\} and H. Li and A. Vossen and H. Aihara and Asner, \{D. M.\} and V. Aulchenko and T. Aushev and V. Babu and I. Badhrees and Bakich, \{A. M.\} and J. Bennett and V. Bhardwaj and T. Bilka and J. Biswal and A. Bobrov and M. Bra{\v c}ko and M. Campajola and L. Cao and D. {\v C}ervenkov and V. Chekelian and A. Chen and Cheon, \{B. G.\} and Cho, \{H. E.\} and K. Cho and Y. Choi and S. Choudhury and D. Cinabro and S. Cunliffe and \{Di Capua\}, F. and \{Di Carlo\}, S. and Dong, \{T. V.\} and S. Eidelman and T. Ferber and Fulsom, \{B. G.\} and V. Gaur and A. Garmash and A. Giri and P. Goldenzweig and O. Hartbrich and K. Hayasaka and H. Hayashii and K. Huang and K. Inami and A. Ishikawa and R. Itoh and M. Iwasaki and Jacobs, \{W. W.\} and Jang, \{E. J.\} and S. Jia and Y. Jin and Kang, \{K. H.\}",

note = "Publisher Copyright: {\textcopyright} 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"} Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.",

year = "2019",

month = nov,

day = "27",

doi = "10.1103/PhysRevD.100.092008",

language = "English",

volume = "100",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "9",

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TY - JOUR

T1 - Azimuthal asymmetries of back-to-back π±- (π0, η, π±) pairs in e+e- annihilation

AU - (Belle Collaboration)

AU - Li, H.

AU - Vossen, A.

AU - Aihara, H.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Babu, V.

AU - Badhrees, I.

AU - Bakich, A. M.

AU - Bennett, J.

AU - Bhardwaj, V.

AU - Bilka, T.

AU - Biswal, J.

AU - Bobrov, A.

AU - Bračko, M.

AU - Campajola, M.

AU - Cao, L.

AU - Červenkov, D.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Cho, H. E.

AU - Cho, K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Di Capua, F.

AU - Di Carlo, S.

AU - Dong, T. V.

AU - Eidelman, S.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Gaur, V.

AU - Garmash, A.

AU - Giri, A.

AU - Goldenzweig, P.

AU - Hartbrich, O.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Huang, K.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Jacobs, W. W.

AU - Jang, E. J.

AU - Jia, S.

AU - Jin, Y.

AU - Kang, K. H.

N1 - Publisher Copyright: © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/" Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.

PY - 2019/11/27

Y1 - 2019/11/27

N2 - This work reports the first observation of azimuthal asymmetries around the thrust axis in e+e- annihilation of pairs of back-to-back charged pions in one hemisphere, and π0 and η mesons in the opposite hemisphere. These results are complemented by a new analysis of pairs of back-to-back charged pions. The π0 and η asymmetries rise with the relative momentum z of the detected hadrons as well as with the transverse momentum with respect to the thrust axis. These asymmetries are sensitive to the Collins fragmentation function H1¥ and provide complementary information to previous measurements with charged pions and kaons in the final state. In particular, the η final states will provide additional information on the flavor structure of H1¥. This is the first measurement of the explicit transverse-momentum dependence of the Collins fragmentation function from Belle data. It uses a dataset of 980.4 fb-1 collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV.

AB - This work reports the first observation of azimuthal asymmetries around the thrust axis in e+e- annihilation of pairs of back-to-back charged pions in one hemisphere, and π0 and η mesons in the opposite hemisphere. These results are complemented by a new analysis of pairs of back-to-back charged pions. The π0 and η asymmetries rise with the relative momentum z of the detected hadrons as well as with the transverse momentum with respect to the thrust axis. These asymmetries are sensitive to the Collins fragmentation function H1¥ and provide complementary information to previous measurements with charged pions and kaons in the final state. In particular, the η final states will provide additional information on the flavor structure of H1¥. This is the first measurement of the explicit transverse-momentum dependence of the Collins fragmentation function from Belle data. It uses a dataset of 980.4 fb-1 collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV.

UR - https://www.scopus.com/pages/publications/85076352739

U2 - 10.1103/PhysRevD.100.092008

DO - 10.1103/PhysRevD.100.092008

M3 - Article

AN - SCOPUS:85076352739

SN - 2470-0010

VL - 100

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - 092008

ER -

Azimuthal asymmetries of back-to-back π±- (π0, η, π±) pairs in e+e- annihilation

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