Recent results on e +e − annihilation to hadrons in the SND experiment

Authors

  • V.N. Zhabin Budker Institute of Nuclear Physics; Novosibirsk State University
  • M.N. Achasov Budker Institute of Nuclear Physics; Novosibirsk State University
  • A.Yu. Barnyakov Budker Institute of Nuclear Physics; Novosibirsk State Technical University
  • A.A. Baykov Budker Institute of Nuclear Physics; Novosibirsk State University
  • K.I. Beloborodov Budker Institute of Nuclear Physics; Novosibirsk State University
  • A.V. Berdyugin Budker Institute of Nuclear Physics; Novosibirsk State University
  • A.G. Bogdanchikov Budker Institute of Nuclear Physics; Novosibirsk State University
  • A.A. Botov Budker Institute of Nuclear Physics
  • T.V. Dimova Budker Institute of Nuclear Physics; Novosibirsk State University
  • V.P. Druzhinin Budker Institute of Nuclear Physics; Novosibirsk State University
  • V.B. Golubev Budker Institute of Nuclear Physics
  • L.V. Kardapoltsev Budker Institute of Nuclear Physics; Novosibirsk State University
  • A.G. Kharlamov Budker Institute of Nuclear Physics; Novosibirsk State University
  • A.A. Korol Budker Institute of Nuclear Physics; Novosibirsk State University
  • D.P. Kovrizhin Budker Institute of Nuclear Physics
  • A.S. Kupich Budker Institute of Nuclear Physics; Novosibirsk State University
  • K.A. Martin Budker Institute of Nuclear Physics
  • N.A. Melnikova Budker Institute of Nuclear Physics
  • N.Yu. Muchnoy Budker Institute of Nuclear Physics; Novosibirsk State University
  • A.E. Obrazovsky Budker Institute of Nuclear Physics
  • E.V. Pakhtusova Budker Institute of Nuclear Physics
  • K.V. Pugachev Budker Institute of Nuclear Physics; Novosibirsk State University
  • Ya.S. Savchenko Budker Institute of Nuclear Physics; Novosibirsk State University
  • S.I. Serednyakov Budker Institute of Nuclear Physics; Novosibirsk State University
  • D.A. Shtol Budker Institute of Nuclear Physics
  • Z.K. Silagadze Budker Institute of Nuclear Physics; Novosibirsk State University
  • I.K. Surin Budker Institute of Nuclear Physics
  • Yu.A. Tikhonov Budker Institute of Nuclear Physics; Novosibirsk State University
  • Yu.V. Usov Budker Institute of Nuclear Physics
  • V.V. Zhulanov Budker Institute of Nuclear Physics; Novosibirsk State University

DOI:

https://doi.org/10.31349/SuplRevMexFis.3.0308056

Keywords:

Hadron cross section, VEPP-2000

Abstract

Recent results of the SND experiment at the VEPP-2000 collider on e +e − annihilation to hadrons below 2 GeV are presented. In particular, we discuss measurements of the e +e − → π +π − and e +e − → nn¯ cross sections. The processes e +e − → π +π −π 0 , K+K−π 0 , ηπ0 γ and 2ηγ were under investigation as well. The preliminary results on the e +e − → ωπ0 → π +π −2π 0 cross section measurement are also presented.

References

P. Y. Shatunov et al., Status and perspectives of the VEPP-2000, Phys. Part. Nucl. Lett. 13 (2016), 995, doi:10.1134/S154747711607044X.

M. N. Achasov et al. (SND collaboration), Measurement of the ( e^+e^- to pi^+pi^- ) process cross section with the SND detector at the VEPP-2000 collider in the energy region ( 0.525 < sqrt{s} < 0.883 ) GeV, J. High Energ. Phys. 2021 (2021), 113, doi:10.1007/JHEP01(2021)113, arXiv:2004.00263 [hep-ex].

M. N. Achasov, A. S. Kupich, Separation of electrons and pions in the SND detector calorimeter, Phys. Part. Nucl. 49 (2018), 64, doi:10.1134/S1063779618010021.

M. N. Achasov et al., Update of the ( e^+e^- to pi^+pi^- ) cross section measured by the spherical neutral detector in the energy region ( 400 < sqrt{s} < 1000 ) MeV, J. Exp. Theor. Phys. 103 (2006), 380, doi:10.1134/S106377610609007X, arXiv:hep-ex/0605013.

J. P. Lees et al. (BaBar collaboration), Precise Measurement of the ( e^+e^- to pi^+pi^-(gamma) ) Cross Section with the Initial State Radiation Method at BABAR, Phys. Rev. Lett. 103 (2009), 231801, doi:10.1103/PhysRevLett.103.231801, arXiv:0908.3589.

A. Anastasi et al. (The KLOE-2 collaboration), Combination of KLOE ( sigma (e^+e^- to pi^+pi^-(gamma)) ) measurements and determination of $a^{pi^+pi^-}_mu$ in the energy range ( 0.10 < s < 0.95 text{ GeV}^2 ), J. High Energ. Phys. 2018 (2018), 173, doi:10.1007/JHEP03(2018)17, arXiv:1711.03085.

M. N. Achasov et al. (SND collaboration), Study of dynamics of the process ( e^+e^- to pi^+pi^-pi^0 ) in the energy range 1.15–2.00 GeV, Eur. Phys. J. C 80 (2020), 993, doi:10.1140/epjc/s10052-020-08524-4, arXiv:2007.14595 [hep-ex].

V. M. Aul'chenko et al., Study of the ( e^+e^- to pi^+pi^-pi^0 ) process in the energy range 1.05–2.00 GeV, J. Exp. Theor. Phys. 121 (2015), 27, doi:10.1134/S1063776115060023.

B. Aubert et al., Study of the ( e^+e^- to pi^+pi^-pi^0 ) process using initial state radiation with BABAR,

Phys. Rev. D 70 (2004), 072004, doi:10.1103/PhysRevD.70.072004, arXiv:hep-ex/0408078.

M. N. Achasov et al., Updated measurement of ( e^+e^- rightarrow omegapi^0 rightarrow pi^0pi^0gamma ) cross section with the SND detector, Phys. Rev. D 94 (2016), 112001, doi:10.1103/PhysRevD.94.112001, arXiv:1610.00235 [hep-ex].

M. N. Achasov et al. (The SND collaboration), Measurement of the ( e^+e^- to K^+K^-pi^0 ) cross section with the SND detector

Eur. Phys. J. C 80 (2020), 1139, doi:10.1140/epjc/s10052-020-08719-9, arXiv:2007.04527 [hep-ex].

B. Aubert et al., Measurements of ( e^+e^- to K^+K^-eta, K^+K^-pi^0 ), and ( K^0_sK^pmpi^mp ) cross sections using initial state radiation events, Phys. Rev. D 77 (2008), 092002, doi:10.1103/PhysRevD.77.092002, arXiv:0710.4451 [hep-ex].

J. P. Lees et al. (BABAR Collaboration), Cross sections for the reactions ( e^+e^- to K^0_sK^0_Lpi^0, K^0_sK^0_Leta ), and ( K^0_sK^0_Lpi^0pi^0 ) from events with initial-state radiation, Phys. Rev. D 95 (2017), 052001, doi:10.1103/PhysRevD.95.052001, arXiv:1701.08297 [hep-ex].

M. N. Achasov et al. (SND collaboration), Study of the process ( e^+e^- to etapi^0gamma ) in the energy range ( sqrt{s}=1.05-2.00 ) GeV with the SND detector, Eur. Phys. J. C 80 (2020), 1008, doi:10.1140/epjc/s10052-020-08556-w, arXiv:2006.05465 [hep-ex].

M. N. Achasov et al., Measurement of the ( e^+e^- to pi^+pi^-pi^0eta ) cross section below ( sqrt{s} = 2 ) GeV,

Phys. Rev. D 99 (2019), 112004, doi:10.1103/PhysRevD.99.112004, arXiv:1903.09307 [hep-ex].

R. R. Akhmetshin et al., Study of the process ( e^+e^- to pi^+pi^-pi^0eta ) in the c.m. energy range 1394–2005 MeV with the CMD-3 detector, Phys. Lett. B 773 (2017), 150, doi:10.1016/j.physletb.2017.08.019, arXiv:1706.06267 [hep-ex].

B. Aubert et al., The ( e^+e^- to 3(pi^+pi^-), 2(pi^+pi^-pi^0) ) and ( K^+K^- 2(pi^+pi^-) ) cross sections at center-of-mass energies from production threshold to 4.5 GeV measured with initial-state radiation, Phys. Rev. D 73 (2006), 052003, doi:10.1103/PhysRevD.73.052003, arXiv:hep-ex/0602006.

J. Lees et al. (BABAR Collaboration), Study of the process ( e^+e^- to pi^+pi^-eta ) using initial state radiation,

Phys. Rev. D 97 (2018), 052007, doi:10.1103/PhysRevD.97.052007, arXiv:1801.02960 [hep-ex].

V. Ivanov et al., Study of the process ( e^+e^- to K^+K^-eta ) with the CMD-3 detector at the VEPP-2000 collider,

Phys. Lett. B 798 (2019), 134946, doi:10.1016/j.physletb.2019.134946, arXiv:1906.08006 [hep-ex].

F. E. Close, A. Donnachie, Yu. S. Kalashnikova, Radiative decays of excited vector mesons, Phys. Rev. D 65, (2002) 092003, doi:10.1103/PhysRevD.65.092003, arXiv:hep-ph/0201043.

M. N. Achasov et al. (SND collaboration), arXiv:2110.05845 [hep-ex].

T. Junk, Confidence level computation for combining searches with small statistics,

Nucl. Instrum. Meth. A 434 (1999), 435, doi:10.1016/S0168-9002(99)00498-2, arXiv:hep-ex/9902006.

A. L. Read, Presentation of search results: the $CL_s$ technique, J. Phys. G 28 (2002), 2693, doi:10.1088/0954-3899/28/10/313.

M. N. Achasov et al., Time resolution of the SND electromagnetic calorimeter, JINST 10 (2015), T06002, doi:10.1088/1748-0221/10/06/T06002.

M. N. Achasov et al., Study of the process ( e^+e^- to nbar{b} ) at the VEPP-2000 $e^+e^-$ collider with the SND detector, Phys. Rev. D 90 (2014), 112007, doi:10.1103/PhysRevD.90.112007, arXiv:1410.3188 [hep-ex].

V. M. Aulchenko et al., The process ( e^+ e^- to omega pi^0 ) near the $Phi$ resonance, J. Exp. Theor. Phys. textbf{90} (2000), 927, doi:10.1134/1.559181.

M. N. Achasov et al., Analysis of ( e^+e^- to pi^+pi^-pi^+pi^- ) and ( e^+e^- to pi^+pi^-pi^0pi^0 ) processes in the energy range of ( sqrt{s}=0.98-1.38 ) GeV in experiments with a spherical neutral detector, J. Exp. Theor. Phys. 96 (2003), 789, doi:10.1134/1.1581933.

M. N. Achasov et al., Study of process ( e^+e^-to pi^+pi^-pi^0pi^0 ) at energies ( sqrt{s} < 1 ) GeV with the spherical neutral detector, J. Exp. Theor. Phys. 109 (2009), 379, doi:10.1134/S1063776109090039.

J. P. Lees et al. (BaBar Collaboration), Measurement of the ( e^+e^-to pi^+pi^-pi^0pi^0 ) cross section using initial-state radiation at BABAR, Phys. Rev. D 96 (2017), 092009, doi:10.1103/PhysRevD.96.092009, arXiv:1709.01171 [hep-ex].

Downloads

Published

2022-06-13

How to Cite

1.
Zhabin V, Achasov M, Barnyakov A, Baykov A, Beloborodov K, Berdyugin A, Bogdanchikov A, Botov A, Dimova T, Druzhinin V, Golubev V, Kardapoltsev L, Kharlamov A, Korol A, Kovrizhin D, Kupich A, Martin K, Melnikova N, Muchnoy N, Obrazovsky A, Pakhtusova E, Pugachev K, Savchenko Y, Serednyakov S, Shtol D, Silagadze Z, Surin I, Tikhonov Y, Usov Y, Zhulanov V. Recent results on e +e − annihilation to hadrons in the SND experiment. Supl. Rev. Mex. Fis. [Internet]. 2022 Jun. 13 [cited 2022 Dec. 9];3(3):0308056 1-5. Available from: https://rmf.smf.mx/ojs/index.php/rmf-s/article/view/6144