Medium effects in ΛK+ pair production by 2.83 GeV protons on nuclei

  • We study ΛK+ pair production in the interaction of protons of 2.83 GeV kinetic energy with C, Cu, Ag, and Au target nuclei in the framework of the nuclear spectral function approach for incoherent primary proton-nucleon and secondary pion-nucleon production processes, and processes associated with the creation of intermediate Σ0K+ pairs. The approach accounts for the initial proton and final Λ hyperon absorption, final K+ meson distortion in nuclei, target nucleon binding, and Fermi motion, as well as nuclear mean-field potential effects on these processes. We calculate the Λ momentum dependence of the absolute ΛK+ yield from the target nuclei considered, in the kinematical conditions of the ANKE experiment, performed at COSY, within the different scenarios for the Λ-nucleus effective scalar potential. We show that the above observable is appreciably sensitive to this potential in the low-momentum region. Therefore, direct comparison of the results of our calculations with the data from the ANKE-at-COSY experiment can help to determine the above potential at finite momenta. We also demonstrate that the two-step pion-nucleon production channels dominate in the low-momentum ΛK+ production in the chosen kinematics and, therefore, they have to be taken into account in the analysis of these data.
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  • [1] A. Gal, E. V. Hungerford, and D. J. Millener, Rev. Mod. Phys., 88:035004(2016)
    [2] M. Nekipelov et al, Phys. Lett. B, 540:207(2002); G. Agakishiev et al, Phys. Rev. C, 82:044907(2010)
    [3] M. Lutz, Phys. Lett. B, 426:12(1998)
    [4] L. Tolos, A. Ramos, and E. Oset, Phys. Rev. C, 74:015203(2006)
    [5] L. Tolos, D. Cabrera, and A. Ramos, Phys. Rev. C, 78:045205(2008)
    [6] L. Tolos, A. Ramos, A. Polls, and T. T. S. Kuo, Nucl. Phys. A, 690:547(2001); L. Tolos, A. Ramos, and A. Polls, Phys. Rev. C, 65:054907(2002)
    [7] E. Friedman, A. Gal, J. Mares, and A. Cieply, Phys. Rev. C, 60:024314(1999)
    [8] A. Sibirtsev and W. Cassing, arXiv:nucl-th/9909053; W. Scheinast et al, Phys. Rev. Lett., 96:072301(2006); T. Kishimoto et al, Nucl. Phys. A, 827:321c (2009); H. W. Barz and L. Naumann, Phys. Rev. C, 68:041901(R) (2003)
    [9] Yu. T. Kiselev et al, Phys. Rev. C, 92:065201(2015)
    [10] V. K. Magas et al, Phys. Rev. C, 71:065202(2005); A. Polyanskiy et al, Phys. Lett. B, 695:74(2011); M. Hartmann et al, Phys. Rev. C, 85:035206(2012); T. Ishikawa et al, Phys. Lett. B, 608:215(2005); M. H. Wood et al, Phys. Rev. Lett., 105:112301(2010)
    [11] C. Fuchs, Prog. Part. Nucl. Phys., 56:1(2006); C. Hartnack et al, Phys. Rep., 510:119(2012); O. Buss et al, Phys. Rep., 512:1(2012)
    [12] Z. Q. Feng, Nucl. Phys. A, 919:32(2013); Z. Q. Feng, W. J. Xie, and G. M. Jin, Phys. Rev. C, 90:064604(2014)
    [13] G. Bunce et al, Phys. Rev. Lett., 36:1113(1976); K. Heller et al, Phys. Lett. B, 68:480(1977); K. Heller et al, Phys. Rev. Lett., 41:607(1978); F. Lomanno et al, Phys. Rev. Lett., 43:1905(1979); F. Abe et al, Phys. Rev. Lett., 50:1102(1983); A. M. Smith et al, Phys. Lett. B, 185:209(1987); B. E. Bonner et al, Phys. Rev. D, 38:729(1988); V. Fanti et al (NA48 Collaboration), Eur. Phys. J. C, 6:265(1999); B. Lundberg et al, Phys. Rev. D, 40:3557(1989)
    [14] G. Agakishiev et al, Eur. Phys. J. A, 50:81(2014)
    [15] O. Hashimoto and H. Tamura, Prog. Part. Nucl. Phys., 57:279(2010); A. Feliciello and T. Nagae, Rep. Prog. Phys., 78:096301(2015)
    [16] M. Kaskulov and E. Oset, Phys. Rev. C, 73:045213(2006)
    [17] M. Kaskulov, L. Roca, and E. Oset, Eur. Phys. J. A, 28:139(2006); E. Ya. Paryev, Yad. Fiz., 75:1602(2012)
    [18] M. F. M. Lutz, C. L. Copra, and M. Moeller, Nucl. Phys. A, 808:124(2008)
    [19] D. Cabrera et al, Phys. Rev. C, 90:055207(2014)
    [20] S. Petschauer et al, Eur. Phys. J. A, 52:15(2016); Ulf-G. Meissner and J. Haidenbauer, arXiv:1603.06429[nucl-th]
    [21] V. Flaminio et al Compilation of cross-sections. Ⅲ-p and bar p} induced reactions. CERN-HERA 79-03 (1979)
    [22] J. Balewski et al (COSY-11 Collaboration), Nucl. Phys. A, 626:85c (1997)
    [23] J. T. Balewski et al (COSY-11 Collaboration), Phys. Lett. B, 420:211(1998)
    [24] S. Sewerin et al (COSY-11 Collaboration), Phys. Rev. Lett., 83:682(1999)
    [25] P. Kowina et al (COSY-11 Collaboration), Eur. Phys. J. A, 22:293(2004)
    [26] R. Bilger et al (COSY-TOF Collaboration), Phys. Lett. B, 420:217(1998)
    [27] S. Abd El-Samad et al (COSY-TOF Collaboration), Phys. Lett. B, 632:27(2006); S. Abd El-Samad et al (COSY-TOF Collaboration), Phys. Lett. B, 688:142(2010)
    [28] M. Abdel-Bary et al (COSY-TOF Collaboration), Eur. Phys. J. A, 46:27(2010)
    [29] Yu. Valdau et al (ANKE Collaboration), Phys. Lett. B, 652:245(2007); Yu. Valdau et al (ANKE Collaboration), Phys. Rev. C, 81:045208(2010)
    [30] J. Adamczewski-Musch et al (HADES Colaboration), Phys. Rev. C, 95:015207(2017); arXiv:1611.01040[nucl-ex]
    [31] E. Ya. Paryev, Eur. Phys. J. A, 5:307(1999)
    [32] G. Fldt and C. Wilkin, Z. Phys. A, 357:241(1997)
    [33] M. Nekipelov et al, J. Phys. G:Nucl. Part. Phys., 34:627(2007)
    [34] G. Agakishiev et al, Phys. Rev. C, 90:015202(2014); arXiv:1403.6662[nucl-ex]
    [35] G. Q. Li, C.-H. Lee, G. E. Brown, Nucl. Phys. A, 625:372(1997)
    [36] G. Agakishiev et al, Phys. Rev. C, 90:054906(2014); arXiv:1404.7011[nucl-ex]
    [37] Yu. Valdau et al (ANKE Collaboration), Phys. Rev. C, 84:055207(2011)
    [38] M. Bscher et al, Eur. Phys. J. A, 22:301(2004)
    [39] K. Tsushima et al, Phys. Rev. C, 59:369(1999)
    [40] A. N. Ivanov et al, arXiv:nucl-th/0509055
    [41] G. Fldt and C. Wilkin, Eur. Phys. J. A, 24:431(2005)
    [42] E. Ya. Paryev, J. Phys. G:Nucl. Part. Phys., 40:025201(2013)
    [43] H. Nagahiro, M. Takizawa, and S. Hirenzaki, Phys. Rev. C, 74:045203(2006)
    [44] E. Ya. Paryev, Eur. Phys. J. A, 9:521(2000)
    [45] K. Tsushima et al, Phys. Lett. B, 429:239(1998)
    [46] C.-H. Lee et al, Phys. Lett. B, 412:235(1997)
    [47] C. B. Dover and G. E. Walker, Phys. Rep., 89:1(1982); D. J. Millener, C. B. Dover and A. Gal, Phys. Rev. C, 38:2700(1988); Y. Yamamoto, H. Bando, and J. Zofka, Prog. Theor. Phys., 80:757(1988)
    [48] M. Rufa et al, Phys. Rev. C, 42:2469(1990)
    [49] N. K. Glendenning et al, Phys. Rev. C, 48:889(1993)
    [50] Y. Yamamoto and H. Bando, Phys. Lett. B, 214:173(1988)
    [51] J. Hu, E. Hiyama, and H. Toki, Phys. Rev. C, 90:014309(2014)
    [52] M. Kohno and Y. Fujiwara, Phys. Rev. C, 79:054318(2009); M. Kohno, Phys. Rev. C, 81:014003(2010)
    [53] T. Inoue et al, arXiv:1612.08399[hep-lat]
    [54] G. Q. Li and C. M. Ko, Phys. Rev. C, 54:1897(1996)
    [55] E. Ya. Paryev, Yad. Fiz., 71:1985(2008)
    [56] E. Ya. Paryev, J. Phys. G:Nucl. Part. Phys., 43:015106(2016)
    [57] E. Ya. Paryev, J. Phys. G:Nucl. Part. Phys., 37:105101(2010)
    [58] E. Ya. Paryev, M. Hartmann, and Yu. T. Kiselev, J. Phys. G:Nucl. Part. Phys., 42:075107(2015)
    [59] E. Ya. Paryev, J. Phys. G:Nucl. Part. Phys., 36:015103(2009)
    [60] S. V. Efremov and E. Ya. Paryev, Eur. Phys. J. A, 1:99(1998)
    [61] E. Ya. Paryev, Eur. Phys. J. A, 7:127(2000)
    [62] S. K. Singh and M. J. Vicente Vacas, Phys. Rev. D, 74:053009(2006)
    [63] J. Haidenbauer and Ulf-G. Meissner, Nucl. Phys. A, 936:29(2015)
    [64] E. Friedman and A. Gal, Phys. Rep., 452:89(2007)
    [65] J. Cugnon and R. M. Lombard, Nucl. Phys. A, 422:635(1984)
    [66] A. Baldini et al, Landolt-Brnstein, New Series, I/12a (1988)
    [67] I. Zychor et al, Phys. Lett. B, 660:167(2008)
    [68] E. Ya. Paryev, Phys. Atom. Nucl., 69:721(2006)
    [69] A. V. Akindinov et al, J. Phys. G:Nucl. Part. Phys., 37:015107(2010)
    [70] S. Friedrich et al, Phys. Lett. B, 736:26(2014)
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E. Ya. Paryev, M. Hartmann and Yu. T. Kiselev. Medium effects in ΛK+ pair production by 2.83 GeV protons on nuclei[J]. Chinese Physics C, 2017, 41(12): 124108. doi: 10.1088/1674-1137/41/12/124108
E. Ya. Paryev, M. Hartmann and Yu. T. Kiselev. Medium effects in ΛK+ pair production by 2.83 GeV protons on nuclei[J]. Chinese Physics C, 2017, 41(12): 124108.  doi: 10.1088/1674-1137/41/12/124108 shu
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Received: 2017-07-28
Revised: 2017-10-05
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Medium effects in ΛK+ pair production by 2.83 GeV protons on nuclei

  • 1. Institute for Nuclear Research, Russian Academy of Sciences, Moscow 117312, Russia
  • 2. Institute for Theoretical and Experimental Physics, Moscow 117218, Russia
  • 3.  Institut fmü
  • 4.  Institute for Theoretical and Experimental Physics, Moscow 117218, Russia
Fund Project:  Supported by the Ministry of Education and Science of the Russian Federation

Abstract: We study ΛK+ pair production in the interaction of protons of 2.83 GeV kinetic energy with C, Cu, Ag, and Au target nuclei in the framework of the nuclear spectral function approach for incoherent primary proton-nucleon and secondary pion-nucleon production processes, and processes associated with the creation of intermediate Σ0K+ pairs. The approach accounts for the initial proton and final Λ hyperon absorption, final K+ meson distortion in nuclei, target nucleon binding, and Fermi motion, as well as nuclear mean-field potential effects on these processes. We calculate the Λ momentum dependence of the absolute ΛK+ yield from the target nuclei considered, in the kinematical conditions of the ANKE experiment, performed at COSY, within the different scenarios for the Λ-nucleus effective scalar potential. We show that the above observable is appreciably sensitive to this potential in the low-momentum region. Therefore, direct comparison of the results of our calculations with the data from the ANKE-at-COSY experiment can help to determine the above potential at finite momenta. We also demonstrate that the two-step pion-nucleon production channels dominate in the low-momentum ΛK+ production in the chosen kinematics and, therefore, they have to be taken into account in the analysis of these data.

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