From soft photon study at Nuclotron and U-70 to NICA

Soft photons
  • E. Ardashev
  • V. Avdeichikov
  • V. Balandin
  • G. Bogdanova
  • V. Dunin
  • O. Gavrishchuk
  • V. Golovkin
  • S. Golovnya
  • S. Gorokhov
  • A. Isupov
  • A. Kazakov
  • A. Kholodenko
  • A. Kiryakov
  • E. Kokoulina
  • A. Kutov
  • N. Kuzmin
  • I. Lobanov
  • V. Nikitin
  • Yu. Petukhov
  • G. Pokatashkin
  • M. Polkovnikov
  • V. Popov
  • S. Reznikov
  • V. Rogov
  • V. Ronzhin
  • I. A. Rufanov
  • V. Ryadovikov
  • Yu. Tsyupa
  • V. Volkov
  • A. Vorobiev
  • N. Zhidkov
  • L. Zolin
Regular Article - Experimental Physics
Part of the following topical collections:
  1. Exploring strongly interacting matter at high densities - NICA White Paper

Abstract.

Experimental and theoretical studies of direct photon production in hadronic collisions essentially expand our insights in multiparticle production mechanisms. These photons are useful probes to investigate nuclear matter at all stages of the interaction. Soft photons play a particular role in these studies. Until now we have no explanation for the experimentally observed excess of soft photons. These photons have low transverse momenta \( p_{T} < 0.1\) GeV/c, \( \vert x\vert < 0.01\) . In this domain their yield exceeds the theoretical estimates by 5-8 times. The registration of soft photons at Nuclotron (LHEP, JINR) has been carried out by the electromagnetic calorimeter built by the SVD-2 Collaboration. Soft photon electromagnetic calorimeter was tested at U-70, IHEP (Protvino). For the first time the soft photon yield at interactions of 3.5A GeV/c per nucleon deuterium and lithium beams has been measured. The obtained energy spectra confirm the increased yield of soft photons with their energy less than 50MeV (in the laboratory system) in comparison with theoretical predictions and agree with previous experiments at high-energy interactions. It is planned to continue soft photon study at the future accelerator complex NICA with heavy-ion beams.

References

  1. 1.
    J.F. Owens, Rev. Mod. Phys. 59, 465 (1997)ADSCrossRefGoogle Scholar
  2. 2.
    W. Vogelsang et al., J. Phys. G 23, A1 (1997)ADSCrossRefGoogle Scholar
  3. 3.
    WA98 Collaboration (M.M. Aggarwal), arXiv:nucl-ex/0006007
  4. 4.
    P.V. Chliapnikov et al., Phys. Lett. B 141, 276 (1984)ADSCrossRefGoogle Scholar
  5. 5.
    M.N. Ukhanov, IHEP preprint 86-195, Protvino, (1986)Google Scholar
  6. 6.
    S. Banerjee et al., Phys. Lett. B 305, 182 (1993)ADSCrossRefGoogle Scholar
  7. 7.
    A. Belogianni et al., Phys. Lett. B 408, 487 (1997)ADSCrossRefGoogle Scholar
  8. 8.
    F. Botterweck et al., Z. Phys. C 51, 541 (1991)ADSCrossRefGoogle Scholar
  9. 9.
    DELPHI Collaboration (J. Abdallah et al.), Eur. Phys. J. C 47, 273 (2006)CrossRefGoogle Scholar
  10. 10.
    DELPHI Collaboration (J. Abdallah et al.), Eur. Phys. J. C 57, 499 (2008)CrossRefGoogle Scholar
  11. 11.
    P. Lichard, L. Van Hove, Phys. Lett. B 245, 605 (1990)ADSCrossRefGoogle Scholar
  12. 12.
    E.V. Shuryak, Phys. Lett. B 231, 175 (1989)ADSCrossRefGoogle Scholar
  13. 13.
    M.K. Volkov et al., Phys. Lett. B 424, 235 (1998)ADSCrossRefGoogle Scholar
  14. 14.
    M.K. Volkov et al., Yad. Fiz. 62, 133 (1999)Google Scholar
  15. 15.
    S. Barshay, Phys. Lett. B 227, 279 (1989)ADSCrossRefGoogle Scholar
  16. 16.
    M.K. Volkov, E.S. Kokoulina, E.A. Kuraev, Ukr. J. Phys. 48, 1252 (2003)Google Scholar
  17. 17.
    E.S. Kokoulina, V.A. Nikitin, in Proceedings of International School-Seminar “The Actual Problems of Microworld Physics”, Gomel, Belarus 2003, Vol. 1 (2005) p. 221Google Scholar
  18. 18.
    E.S. Kokoulina, V.A. Nikitin, in Proceedings of the XVII International Baldin Seminar on High Energy Physics Problems: Relativistic Nuclear Physics and Quantum Chromodynamics: ISHEPP 2004, edited by A.N. Sissakian, V.V. Burov, A.I. Malakhov (JINR, Dubna, 2005) p. 319Google Scholar
  19. 19.
    P.F. Ermolov, in Proceedings of the XVII International Baldin Seminar on High Energy Physics Problems: Relativistic Nuclear Physics and Quantum Chromodynamics: ISHEPP 2004, edited by A.N. Sissakian, V.V. Burov, A.I. Malakhov (JINR, Dubna, 2005) p. 327Google Scholar
  20. 20.
    V.V. Avdeichikov, JINR-P1-2004-190 (2005)Google Scholar
  21. 21.
    E. Kokoulina, Acta Phys. Pol. B 35, 295 (2004)ADSGoogle Scholar
  22. 22.
    E. Kokoulina, A. Kutov, Phys. At. Nucl. 71, 1543 (2008)CrossRefGoogle Scholar
  23. 23.
    E.S. Kokoulina et al., Phys. At. Nucl. 72, 189 (2009)CrossRefGoogle Scholar
  24. 24.
    SVD-2 Collaboration (E.N. Ardashev), IHEP Preprint 2011-4 (2011), http://web.ihep.su/library/pubs/all-w.htm arXiv:hep-ex/1104.0101
  25. 25.
    E.S. Kokoulina on behalf of the SVD-2 Collaboration, Progr. Theor. Phys. 193, 306 (2012)CrossRefGoogle Scholar
  26. 26.
    V.N. Ryadovikov on behalf of the SVD-2 Collaboration, Phys. At. Nucl. 75, 989 (2012) arXiv:hep-ex/1104.3673CrossRefGoogle Scholar
  27. 27.
    V.V. Begun, M.I. Gorenstein, Phys. Lett. B 53, 190 (2007)ADSCrossRefGoogle Scholar
  28. 28.
    V.A. Nikitin et al., Nonlinear Phenom. Complet Syst. 12, 202 (2010)Google Scholar
  29. 29.
    J. Cleymans, K. Redlich, Phys. Rev. C 60, 054908 (1999)ADSCrossRefGoogle Scholar
  30. 30.
    F. Becattini, J. Manninen, M. Gazdzicki, Phys. Rev. C 73, 044905 (2006)ADSCrossRefGoogle Scholar
  31. 31.
    SVD-2 Collaboration (E.N. Ardashev et al.), Instrum. Exp. Tech. 58, 18 (2015)Google Scholar
  32. 32.
    SVD-2 Collaboration (E. Kokoulina et al.), EPJ Web of Conferences 105, 10005 (2016) arXiv:1510.00517 [nucl-ex]Google Scholar

Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • E. Ardashev
    • 1
  • V. Avdeichikov
    • 2
  • V. Balandin
    • 2
  • G. Bogdanova
    • 3
  • V. Dunin
    • 2
  • O. Gavrishchuk
    • 2
  • V. Golovkin
    • 1
  • S. Golovnya
    • 1
  • S. Gorokhov
    • 1
  • A. Isupov
    • 2
  • A. Kazakov
    • 5
  • A. Kholodenko
    • 1
  • A. Kiryakov
    • 1
  • E. Kokoulina
    • 2
  • A. Kutov
    • 4
  • N. Kuzmin
    • 2
  • I. Lobanov
    • 1
  • V. Nikitin
    • 2
  • Yu. Petukhov
    • 2
  • G. Pokatashkin
    • 6
  • M. Polkovnikov
    • 1
  • V. Popov
    • 3
  • S. Reznikov
    • 2
  • V. Rogov
    • 2
  • V. Ronzhin
    • 1
  • I. A. Rufanov
    • 2
  • V. Ryadovikov
    • 1
  • Yu. Tsyupa
    • 1
  • V. Volkov
    • 3
  • A. Vorobiev
    • 1
  • N. Zhidkov
    • 2
  • L. Zolin
    • 2
  1. 1.Institute of High Energy PhysicsProtvinoRussia
  2. 2.Joint Institute for Nuclear ResearchDubnaRussia
  3. 3.Scobeltsyn Institute of Nuclear PhysicsLomonosov Moscow State UniversityMoscowRussia
  4. 4.DM Komi SC UrD RASSyktyvkarRussia
  5. 5.Smolensk State UniversitySmolenskRussia
  6. 6.Gomel State UniversityGomelBelarus

Personalised recommendations