Forward production of Υ mesons in pp collisions at \( \sqrt{s}=7 \) and 8 TeV

Abstract

The production of Υ mesons in pp collisions at \( \sqrt{s}=7 \) and 8 TeV is studied with the LHCb detector using data samples corresponding to an integrated luminosity of 1 fb−1 and 2 fb−1 respectively. The production cross-sections and ratios of cross-sections are measured as functions of the meson transverse momentum p and rapidity y, for p < 30 GeV/c and 2.0 < y < 4.5.

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References

  1. [1]

    W.E. Caswell and G.P. Lepage, Effective Lagrangians for Bound State Problems in QED, QCD and Other Field Theories, Phys. Lett. B 167 (1986) 437 [INSPIRE].

    Article  ADS  Google Scholar 

  2. [2]

    G.T. Bodwin, E. Braaten and G.P. Lepage, Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium, Phys. Rev. D 51 (1995) 1125 [Erratum ibid. D 55 (1997)5853] [hep-ph/9407339] [INSPIRE].

  3. [3]

    V.G. Kartvelishvili, A.K. Likhoded and S.R. Slabospitsky, D Meson and ψ Meson Production in Hadronic Interactions (in Russian), Sov. J. Nucl. Phys. 28 (1978) 678 [Yad. Fiz. 28 (1978) 1315] [INSPIRE].

  4. [4]

    R. Baier and R. Rückl, Hadronic Production of J/ψ and Υ: Transverse Momentum Distributions, Phys. Lett. B 102 (1981) 364 [INSPIRE].

    Article  ADS  Google Scholar 

  5. [5]

    CDF collaboration, F. Abe et al., Inclusive J/ψ, ψ(2S) and b quark production in \( \overline{p}p \) collisions at \( \sqrt{s}=1.8 \) TeV, Phys. Rev. Lett. 69 (1992) 3704 [INSPIRE].

  6. [6]

    E. Braaten and S. Fleming, Color octet fragmentation and the psi-prime surplus at the Tevatron, Phys. Rev. Lett. 74 (1995) 3327 [hep-ph/9411365] [INSPIRE].

    Article  ADS  Google Scholar 

  7. [7]

    J.M. Campbell, F. Maltoni and F. Tramontano, QCD corrections to J/ψ and Υ production at hadron colliders, Phys. Rev. Lett. 98 (2007) 252002 [hep-ph/0703113] [INSPIRE].

    Article  ADS  Google Scholar 

  8. [8]

    B. Gong and J.-X. Wang, Next-to-leading-order QCD corrections to J/ψ polarization at Tevatron and Large-Hadron-Collider energies, Phys. Rev. Lett. 100 (2008) 232001 [arXiv:0802.3727] [INSPIRE].

    Article  ADS  Google Scholar 

  9. [9]

    P. Artoisenet, J.M. Campbell, J.-P. Lansberg, F. Maltoni and F. Tramontano, Υ Production at Fermilab Tevatron and LHC Energies, Phys. Rev. Lett. 101 (2008) 152001 [arXiv:0806.3282] [INSPIRE].

    Article  ADS  Google Scholar 

  10. [10]

    J.-P. Lansberg, On the mechanisms of heavy-quarkonium hadroproduction, Eur. Phys. J. C 61 (2009) 693 [arXiv:0811.4005] [INSPIRE].

    Article  ADS  Google Scholar 

  11. [11]

    H. Han, Y.-Q. Ma, C. Meng, H.-S. Shao, Y.-J. Zhang and K.-T. Chao, Υ(nS) and χ b (nP) production at hadron colliders in nonrelativistic QCD, arXiv:1410.8537 [INSPIRE].

  12. [12]

    N. Brambilla et al., Heavy quarkonium: progress, puzzles and opportunities, Eur. Phys. J. C 71 (2011) 1534 [arXiv:1010.5827] [INSPIRE].

    Article  ADS  Google Scholar 

  13. [13]

    ATLAS collaboration, Observation of a new χ b state in radiative transitions to Υ(1S) and Υ(2S) at ATLAS, Phys. Rev. Lett. 108 (2012) 152001 [arXiv:1112.5154] [INSPIRE].

  14. [14]

    D0 collaboration, V.M. Abazov et al., Observation of a narrow mass state decaying into Υ(1S) + γ in \( p\overline{p} \) collisions at \( \sqrt{s}=1.96 \) TeV, Phys. Rev. D 86 (2012) 031103 [arXiv:1203.6034] [INSPIRE].

  15. [15]

    LHCb collaboration, Measurement of the fraction of Υ(1S) originating from χ b (1P) decays in pp collisions at \( \sqrt{s}=7 \) TeV, JHEP 11 (2012) 031 [arXiv:1209.0282] [INSPIRE].

  16. [16]

    LHCb collaboration, Study of χ b meson production in pp collisions at \( \sqrt{s}=7 \) and 8 TeV and observation of the decay χ b (3P) → Υ(3S)γ, Eur. Phys. J. C 74 (2014) 3092 [arXiv:1407.7734] [INSPIRE].

  17. [17]

    A. Mazurov, High Level Trigger software performance profiling and χ b production study at the LHCb experiment, Ph.D. Thesis, Ferrara University, Ferrara Italy (2014) [CERN-THESIS-2014-016].

  18. [18]

    LHCb collaboration, Measurement of the χ b (3P) mass and of the relative rate of χ b1(1P) and χ b2(1P production, JHEP 10 (2014) 088 [arXiv:1409.1408] [INSPIRE].

  19. [19]

    A.K. Likhoded, A.V. Luchinsky and S.V. Poslavsky, Production of χ b -mesons at LHC, Phys. Rev. D 86 (2012) 074027 [arXiv:1203.4893] [INSPIRE].

    ADS  Google Scholar 

  20. [20]

    K. Wang, Y.-Q. Ma and K.-T. Chao, Υ(1S) prompt production at the Tevatron and LHC in nonrelativistic QCD, Phys. Rev. D 85 (2012) 114003 [arXiv:1202.6012] [INSPIRE].

    ADS  Google Scholar 

  21. [21]

    LHCb collaboration, Measurement of Υ production in pp collisions at \( \sqrt{s}=2.76 \) TeV, Eur. Phys. J. C 74 (2014) 2835 [arXiv:1402.2539] [INSPIRE].

  22. [22]

    LHCb collaboration, Measurement of Υ production in pp collisions at \( \sqrt{s}=7 \) TeV, Eur. Phys. J. C 72 (2012) 2025 [arXiv:1202.6579] [INSPIRE].

  23. [23]

    LHCb collaboration, Production of J/ψ and Υ mesons in pp collisions at \( \sqrt{s}=8 \) TeV, JHEP 06 (2013) 064 [arXiv:1304.6977] [INSPIRE].

  24. [24]

    ALICE collaboration, Measurement of quarkonium production at forward rapidity in pp collisions at \( \sqrt{s}=7 \) TeV, Eur. Phys. J. C 74 (2014) 2974 [arXiv:1403.3648] [INSPIRE].

  25. [25]

    ATLAS collaboration, Measurement of Υ production in 7 TeV pp collisions at ATLAS, Phys. Rev. D 87 (2013) 052004 [arXiv:1211.7255] [INSPIRE].

  26. [26]

    CMS collaboration, Υ Production Cross-Section in pp Collisions at \( \sqrt{s}=7 \) TeV, Phys. Rev. D 83 (2011) 112004 [arXiv:1012.5545] [INSPIRE].

  27. [27]

    CMS collaboration, Measurement of the Υ(1S), Υ(2S) and Υ(3S) cross sections in pp collisions at \( \sqrt{s}=7 \) TeV, Phys. Lett. B 727 (2013) 101 [arXiv:1303.5900] [INSPIRE].

  28. [28]

    LHCb collaboration, Measurement of J/ψ production in pp collisions at \( \sqrt{s}=7 \) TeV, Eur. Phys. J. C 71 (2011) 1645 [arXiv:1103.0423] [INSPIRE].

  29. [29]

    LHCb collaboration, The LHCb Detector at the LHC, 2008 JINST 3 S08005 [INSPIRE].

  30. [30]

    LHCb collaboration, LHCb Detector Performance, Int. J. Mod. Phys. A 30 (2015) 1530022 [arXiv:1412.6352] [INSPIRE].

  31. [31]

    A.A. Alves Jr. et al., Performance of the LHCb muon system, 2013 JINST 8 P02022 [arXiv:1211.1346] [INSPIRE].

  32. [32]

    R. Aaij et al., The LHCb Trigger and its Performance in 2011, 2013 JINST 8 P04022 [arXiv:1211.3055] [INSPIRE].

  33. [33]

    T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].

    Article  ADS  Google Scholar 

  34. [34]

    LHCb collaboration, Handling of the generation of primary events in Gauss, the LHCb simulation framework, J. Phys. Conf. Ser. 331 (2011) 032047 [INSPIRE].

  35. [35]

    D.J. Lange, The EvtGen particle decay simulation package, Nucl. Instrum. Meth. A 462 (2001) 152 [INSPIRE].

    Article  ADS  Google Scholar 

  36. [36]

    P. Golonka and Z. Was, PHOTOS Monte Carlo: A Precision tool for QED corrections in Z and W decays, Eur. Phys. J. C 45 (2006) 97 [hep-ph/0506026] [INSPIRE].

    Article  ADS  Google Scholar 

  37. [37]

    Geant4 collaboration, J. Allison et al., Geant4 developments and applications, IEEE Trans. Nucl. Sci. 53 (2006) 270 [INSPIRE].

  38. [38]

    Geant4 collaboration, S. Agostinelli et al., GEANT4: A Simulation toolkit, Nucl. Instrum. Meth. A 506 (2003) 250 [INSPIRE].

  39. [39]

    M. Clemencic et al., The LHCb simulation application, Gauss: Design, evolution and experience, J. Phys. Conf. Ser. 331 (2011) 032023 [INSPIRE].

    Article  ADS  Google Scholar 

  40. [40]

    LHCb collaboration, Measurement of the track reconstruction efficiency at LHCb, 2015 JINST 10 P02007 [arXiv:1408.1251] [INSPIRE].

  41. [41]

    F. Archilli et al., Performance of the Muon Identification at LHCb, 2013 JINST 8 P10020 [arXiv:1306.0249] [INSPIRE].

  42. [42]

    W.D. Hulsbergen, Decay chain fitting with a Kalman filter, Nucl. Instrum. Meth. A 552 (2005) 566 [physics/0503191] [INSPIRE].

    Article  ADS  Google Scholar 

  43. [43]

    Particle Data Group collaboration, K.A. Olive et al., Review of Particle Physics, Chin. Phys. C 38 (2014) 090001 [INSPIRE].

  44. [44]

    T. Skwarnicki, A study of the radiative cascade transitions between the Υ′ and Υ resonances, Ph.D. Thesis, Institute of Nuclear Physics, Krakow Poland (1986) [DESY-F31-86-02] [INSPIRE].

  45. [45]

    M. Pivk and F.R. Le Diberder, SPlot: A Statistical tool to unfold data distributions, Nucl. Instrum. Meth. A 555 (2005) 356 [physics/0402083] [INSPIRE].

    Article  ADS  Google Scholar 

  46. [46]

    S. van der Meer, Calibration of the effective beam height in the ISR, CERN-ISR-PO-68-31 (1968) [INSPIRE].

  47. [47]

    M. Ferro-Luzzi, Proposal for an absolute luminosity determination in colliding beam experiments using vertex detection of beam-gas interactions, Nucl. Instrum. Meth. A 553 (2005) 388 [INSPIRE].

    Article  ADS  Google Scholar 

  48. [48]

    LHCb collaboration, Absolute luminosity measurements with the LHCb detector at the LHC, 2012 JINST 7 P01010 [arXiv:1110.2866] [INSPIRE].

  49. [49]

    LHCb collaboration, Precision luminosity measurements at LHCb, 2014 JINST 9 P12005 [arXiv:1410.0149] [INSPIRE].

  50. [50]

    C. Barschel, Precision luminosity measurement at LHCb with beam-gas imaging, Ph.D. Thesis, RWTH Aachen University, Aachen Germany (2014) [CERN-THESIS-2013-301] [INSPIRE].

  51. [51]

    J. Wenninger, Energy Calibration of the LHC Beams at 4 TeV, CERN-ATS-2013-040 (2013).

  52. [52]

    CMS collaboration, Measurement of the Y (1S), Y (2S) and Y (3S) polarizations in pp collisions at \( \sqrt{s}=7 \) TeV, Phys. Rev. Lett. 110 (2013) 081802 [arXiv:1209.2922] [INSPIRE].

  53. [53]

    J.C. Collins and D.E. Soper, Angular Distribution of Dileptons in High-Energy Hadron Collisions, Phys. Rev. D 16 (1977) 2219 [INSPIRE].

    ADS  Google Scholar 

  54. [54]

    C. Tsallis, Possible Generalization of Boltzmann-Gibbs Statistics, J. Statist. Phys. 52 (1988) 479 [INSPIRE].

    MATH  MathSciNet  Article  ADS  Google Scholar 

  55. [55]

    LHCb collaboration, Study of the production of Λ 0 b and \( {\overline{B}}^0 \) hadrons in pp collisions and first measurement of the Λ 0 b  → J/ψpK branching fraction, LHCb-PAPER-2015-032 (2015) [INSPIRE].

  56. [56]

    CMS collaboration, Measurement of the Λ b cross section and the \( {}^{{\overline{\Lambda}}_b} \) to Λ b ratio with J/ΨΛ decays in pp collisions at \( \sqrt{s}=7 \) TeV, Phys. Lett. B 714 (2013) 136 [arXiv:1205.0594] [INSPIRE].

  57. [57]

    H. Zheng, L. Zhu and A. Bonasera, Systematic analysis of hadron spectra in p + p collisions using Tsallis distributions, Phys. Rev. D 92 (2015) 074009 [arXiv:1506.03156] [INSPIRE].

    ADS  Google Scholar 

  58. [58]

    L. Marques, J. Cleymans and A. Deppman, Description of High-Energy pp Collisions Using Tsallis Thermodynamics: Transverse Momentum and Rapidity Distributions, Phys. Rev. D 91 (2015) 054025 [arXiv:1501.00953] [INSPIRE].

    ADS  Google Scholar 

  59. [59]

    E.L. Berger and D.L. Jones, Inelastic Photoproduction of J/ψ and Υ by Gluons, Phys. Rev. D 23 (1981) 1521 [INSPIRE].

    ADS  Google Scholar 

  60. [60]

    C.-H. Chang, Hadronic Production of J/ψ Associated With a Gluon, Nucl. Phys. B 172 (1980) 425 [INSPIRE].

    ADS  Google Scholar 

  61. [61]

    R. Baier and R. Rückl, Hadronic Collisions: A Quarkonium Factory, Z. Phys. C 19 (1983) 251 [INSPIRE].

    ADS  Google Scholar 

  62. [62]

    G.D. Lafferty and T.R. Wyatt, Where to stick your data points: The treatment of measurements within wide bins, Nucl. Instrum. Meth. A 355 (1995) 541 [INSPIRE].

    Article  ADS  Google Scholar 

  63. [63]

    L.S. Kisslinger, M.X. Liu and P. McGaughey, Heavy Quark State Production In p-p Collisions, Phys. Rev. D 84 (2011) 114020 [Erratum ibid. D 86 (2012) 039902] [arXiv:1108.4049] [INSPIRE].

  64. [64]

    L.S. Kisslinger and D. Das, Ψ and Υ Production In pp Collisions at 7.0 TeV, Mod. Phys. Lett. A 28 (2013) 1350120 [arXiv:1306.6616] [INSPIRE].

    Article  ADS  Google Scholar 

  65. [65]

    L.S. Kisslinger and D. Das, Ψ and Υ Production In pp Collisions at 8.0 TeV, Mod. Phys. Lett. A 29 (2014) 1450082 [arXiv:1403.2271] [INSPIRE].

    Article  ADS  Google Scholar 

  66. [66]

    M. Cacciari, M. Greco and P. Nason, The p T spectrum in heavy flavor hadroproduction, JHEP 05 (1998) 007 [hep-ph/9803400] [INSPIRE].

    Article  ADS  Google Scholar 

  67. [67]

    M. Cacciari, S. Frixione and P. Nason, The p T spectrum in heavy flavor photoproduction, JHEP 03 (2001) 006 [hep-ph/0102134] [INSPIRE].

    Article  ADS  Google Scholar 

  68. [68]

    M. Cacciari, S. Frixione, N. Houdeau, M.L. Mangano, P. Nason and G. Ridolfi, Theoretical predictions for charm and bottom production at the LHC, JHEP 10 (2012) 137 [arXiv:1205.6344] [INSPIRE].

    Article  ADS  Google Scholar 

  69. [69]

    L.S. Kisslinger, Mixed Heavy Quark Hybrid Mesons, Decay Puzzles and RHIC, Phys. Rev. D 79 (2009) 114026 [arXiv:0903.1120] [INSPIRE].

    ADS  Google Scholar 

  70. [70]

    L.S. Kisslinger and D. Das, Υ Production In pp Collisions For Forward Rapidities At LHC, Mod. Phys. Lett. A 28 (2013) 1350067 [arXiv:1207.3296] [INSPIRE].

    Article  ADS  Google Scholar 

  71. [71]

    L.S. Kisslinger, Υ Production In pp Collisions at LHC, Mod. Phys. Lett. A 27 (2012) 1250074 [arXiv:1201.1033] [INSPIRE].

    Article  ADS  Google Scholar 

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