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Charm production in charged current deep inelastic scattering at HERA

A preprint version of the article is available at arXiv.

Abstract

Charm production in charged current deep inelastic scattering has been measured for the first time in e±p collisions, using data collected with the ZEUS detector at HERA, corresponding to an integrated luminosity of 358 pb−1. Results are presented separately for e+p and ep scattering at a centre-of-mass energy of \( \sqrt{s} \) = 318 GeV within a kinematic phase-space region of 200 GeV2 < Q2 < 60000 GeV2 and y < 0.9, where Q2 is the squared four-momentum transfer and y is the inelasticity. The measured cross sections of electroweak charm production are consistent with expectations from the Standard Model within the large statistical uncertainties.

References

  1. Particle Data Group collaboration, Review of Particle Physics, Phys. Rev. D 98 (2018) 030001 [INSPIRE].

  2. CCFR collaboration, Determination of the strange quark content of the nucleon from a next-to-leading order QCD analysis of neutrino charm production, Z. Phys. C 65 (1995) 189 [hep-ex/9406007] [INSPIRE].

  3. NuTeV collaboration, Precise Measurement of Dimuon Production Cross-Sections in ν μ Fe and \( {\overline{\nu}}_{\mu } \) Fe Deep Inelastic Scattering at the Tevatron., Phys. Rev. D 64 (2001) 112006 [hep-ex/0102049] [INSPIRE].

  4. NOMAD collaboration, A Precision Measurement of Charm Dimuon Production in Neutrino Interactions from the NOMAD Experiment, Nucl. Phys. B 876 (2013) 339 [arXiv:1308.4750] [INSPIRE].

  5. A. Kayis-Topaksu et al., Measurement of charm production in neutrino charged-current interactions, New J. Phys. 13 (2011) 093002.

    ADS  Article  Google Scholar 

  6. ATLAS collaboration, Precision measurement and interpretation of inclusive W + , W and Z/γ * production cross sections with the ATLAS detector, Eur. Phys. J. C 77 (2017) 367 [arXiv:1612.03016] [INSPIRE].

  7. A.M. Cooper-Sarkar and K. Wichmann, QCD analysis of the ATLAS and CMS W ± and Z cross-section measurements and implications for the strange sea density, Phys. Rev. D 98 (2018) 014027 [arXiv:1803.00968] [INSPIRE].

    ADS  Google Scholar 

  8. ATLAS collaboration, Measurement of the production of a W boson in association with a charm quark in pp collisions at \( \sqrt{s} \) = 7 TeV with the ATLAS detector, JHEP 05 (2014) 068 [arXiv:1402.6263] [INSPIRE].

  9. CMS collaboration, Measurement of associated W + charm production in pp collisions at \( \sqrt{s} \) = 7 TeV, JHEP 02 (2014) 013 [arXiv:1310.1138] [INSPIRE].

  10. CMS collaboration, Measurement of associated production of a W boson and a charm quark in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, Eur. Phys. J. C 79 (2019) 269 [arXiv:1811.10021] [INSPIRE].

  11. S. Alekhin et al., Determination of Strange Sea Quark Distributions from Fixed-target and Collider Data, Phys. Rev. D 91 (2015) 094002 [arXiv:1404.6469] [INSPIRE].

    ADS  Google Scholar 

  12. S. Alekhin, J. Blümlein and S. Moch, Strange sea determination from collider data, Phys. Lett. B 777 (2018) 134 [arXiv:1708.01067] [INSPIRE].

    ADS  Article  Google Scholar 

  13. R. Devenish and A. Cooper-Sarkar, Deep Inelastic Scattering, Oxford University Press, Oxford U.K. (2003).

    Book  Google Scholar 

  14. R.S. Thorne and R.G. Roberts, A Variable number flavor scheme for charged current heavy flavor structure functions, Eur. Phys. J. C 19 (2001) 339 [hep-ph/0010344] [INSPIRE].

  15. A.M. Cooper-Sarkar, R.C.E. Devenish and A. De Roeck, Structure functions of the nucleon and their interpretation, Int. J. Mod. Phys. A 13 (1998) 3385 [hep-ph/9712301] [INSPIRE].

  16. M. Glück, S. Kretzer and E. Reya, The Strange sea density and charm production in deep inelastic charged current processes, Phys. Lett. B 380 (1996) 171 [Erratum ibid. B 405 (1997) 391] [hep-ph/9603304] [INSPIRE].

  17. M. Buza and W.L. van Neerven, O(α 2 S ) contributions to charm production in charged current deep inelastic lepton-hadron scattering, Nucl. Phys. B 500 (1997) 301 [hep-ph/9702242] [INSPIRE].

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

  19. S. Forte, E. Laenen, P. Nason and J. Rojo, Heavy quarks in deep-inelastic scattering, Nucl. Phys. B 834 (2010) 116 [arXiv:1001.2312] [INSPIRE].

    ADS  Article  MATH  Google Scholar 

  20. S. Alekhin et al., HERAFitter, Eur. Phys. J. C 75 (2015) 304 [arXiv:1410.4412] [INSPIRE], www.xfitter.org.

  21. OPENQCDRAD, http://www-zeuthen.desy.de/~alekhin/OPENQCDRAD.

  22. S. Alekhin, J. Blümlein and S. Moch, Parton Distribution Functions and Benchmark Cross Sections at NNLO, Phys. Rev. D 86 (2012) 054009 [arXiv:1202.2281] [INSPIRE].

    ADS  Google Scholar 

  23. I. Bierenbaum, J. Blümlein and S. Klein, The Gluonic Operator Matrix Elements at O(α 2 s ) for DIS Heavy Flavor Production, Phys. Lett. B 672 (2009) 401 [arXiv:0901.0669] [INSPIRE].

    ADS  Article  Google Scholar 

  24. V. Bertone, S. Carrazza and J. Rojo, APFEL: A PDF Evolution Library with QED corrections, Comput. Phys. Commun. 185 (2014) 1647 [arXiv:1310.1394] [INSPIRE].

    ADS  MathSciNet  Article  MATH  Google Scholar 

  25. NNPDF collaboration, Parton distributions from high-precision collider data, Eur. Phys. J. C 77 (2017) 663 [arXiv:1706.00428] [INSPIRE].

  26. M. Botje, QCDNUM: Fast QCD Evolution and Convolution, Comput. Phys. Commun. 182 (2011) 490 [arXiv:1005.1481] [INSPIRE].

    ADS  Article  MATH  Google Scholar 

  27. H1, ZEUS collaboration, Combination of measurements of inclusive deep inelastic e ± p scattering cross sections and QCD analysis of HERA data, Eur. Phys. J. C 75 (2015) 580 [arXiv:1506.06042] [INSPIRE].

  28. A.D. Martin, W.J. Stirling, R.S. Thorne and G. Watt, Parton distributions for the LHC, Eur. Phys. J. C 63 (2009) 189 [arXiv:0901.0002] [INSPIRE].

    ADS  Article  MATH  Google Scholar 

  29. P.M. Nadolsky et al., Implications of CTEQ global analysis for collider observables, Phys. Rev. D 78 (2008) 013004 [arXiv:0802.0007] [INSPIRE].

    ADS  Google Scholar 

  30. ATLAS collaboration, Determination of the strange quark density of the proton from ATLAS measurements of the Wℓν and Zℓℓ cross sections, Phys. Rev. Lett. 109 (2012) 012001 [arXiv:1203.4051] [INSPIRE].

  31. HERMES collaboration, Measurement of Parton Distributions of Strange Quarks in the Nucleon from Charged-Kaon Production in Deep-Inelastic Scattering on the Deuteron, Phys. Lett. B 666 (2008) 446 [arXiv:0803.2993] [INSPIRE].

  32. HERMES collaboration, Reevaluation of the parton distribution of strange quarks in the nucleon, Phys. Rev. D 89 (2014) 097101 [arXiv:1312.7028] [INSPIRE].

  33. ZEUS collaboration, The ZEUS Detector, Status Report, PUBDB-2017-12635, DESY, Hamburg Germany (2017).

  34. N. Harnew et al., Vertex Triggering Using Time Difference Measurements in the ZEUS Central Tracking Detector, Nucl. Instrum. Meth. A 279 (1989) 290 [INSPIRE].

    ADS  Article  Google Scholar 

  35. B. Foster et al., The performance of the ZEUS central tracking detector z-by-timing electronics in a transputer based data acquisition system, Nucl. Phys. Proc. Suppl. B 32 (1993) 181.

    ADS  Article  Google Scholar 

  36. B. Foster et al., The Design and construction of the ZEUS central tracking detector, Nucl. Instrum. Meth. A 338 (1994) 254 [INSPIRE].

    ADS  Article  Google Scholar 

  37. A. Polini et al., The design and performance of the ZEUS Micro Vertex detector, Nucl. Instrum. Meth. A 581 (2007) 656 [arXiv:0708.3011] [INSPIRE].

    ADS  Article  Google Scholar 

  38. ZEUS STT collaboration, Straw tube tracking detector (STT) for ZEUS, Nucl. Instrum. Meth. A 535 (2004) 191 [INSPIRE].

  39. M. Derrick et al., Design and construction of the ZEUS barrel calorimeter., Nucl. Instrum. Meth. A 309 (1991) 77 [INSPIRE].

    ADS  Article  Google Scholar 

  40. ZEUS Calorimeter Group collaboration, Construction and beam test of the ZEUS forward and rear calorimeter, Nucl. Instrum. Meth. A 309 (1991) 101 [INSPIRE].

  41. A. Caldwell et al., Design and implementation of a high precision readout system for the ZEUS calorimeter, Nucl. Instrum. Meth. A 321 (1992) 356 [INSPIRE].

    ADS  Article  Google Scholar 

  42. ZEUS Barrel Calorimeter Group collaboration, Beam tests of the ZEUS barrel calorimeter, Nucl. Instrum. Meth. A 336 (1993) 23 [INSPIRE].

  43. I.M. Kudla, R.J. Nowak, R. Walczak, A.F. Zarnecki and H. Abramowicz, Test of a prototype of the ZEUS backing calorimeter, Nucl. Instrum. Meth. A 300 (1991) 480 [INSPIRE].

    ADS  Article  Google Scholar 

  44. J. Andruszków et al., First measurement of HERA luminosity by ZEUS lumi monitor, Preprint DESY-92-066, DESY, Hamburg Germany (1992).

  45. ZEUS collaboration, Measurement of total and partial photon proton cross-sections at 180-GeV center-of-mass energy, Z. Phys. C 63 (1994) 391 [INSPIRE].

  46. ZEUS Luminosity Group collaboration, Luminosity measurement in the ZEUS experiment, Acta Phys. Polon. B 32 (2001) 2025 [INSPIRE].

  47. M. Helbich et al., The Spectrometer system for measuring ZEUS luminosity at HERA, Nucl. Instrum. Meth. A 565 (2006) 572 [physics/0512153] [INSPIRE].

  48. H. Spiesberger, Django1.6 Version 4.6.6 – A Monte Carlo Generator for Deep Inelastic Lepton Proton Scattering Including QED and QCD Radiative Effects, http://wwwthep.physik.uni-mainz.de/~hspiesb/djangoh/djangoh.html (2005).

  49. CTEQ collaboration, Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions, Eur. Phys. J. C 12 (2000) 375 [hep-ph/9903282] [INSPIRE].

  50. L. Lönnblad, ARIADNE version 4: A Program for simulation of QCD cascades implementing the color dipole model, Comput. Phys. Commun. 71 (1992) 15 [INSPIRE].

    ADS  Article  Google Scholar 

  51. T. Sjöstrand, High-energy physics event generation with PYTHIA 5.7 and JETSET 7.4, Comput. Phys. Commun. 82 (1994) 74 [INSPIRE].

  52. G. Marchesini, B.R. Webber, G. Abbiendi, I.G. Knowles, M.H. Seymour and L. Stanco, HERWIG: A Monte Carlo event generator for simulating hadron emission reactions with interfering gluons. Version 5.1 - April 1991, Comput. Phys. Commun. 67 (1992) 465 [INSPIRE].

  53. W.H. Smith, K. Tokushuku and L.W. Wiggers, The ZEUS trigger system, in Proceedings of Computing in High-Energy Physics (CHEP), Annecy France (1992), pg. 222.

  54. P.D. Allfrey et al., The design and performance of the ZEUS global tracking trigger, Nucl. Instrum. Meth. A 580 (2007) 1257 [INSPIRE].

    ADS  Article  Google Scholar 

  55. ZEUS collaboration, Measurement of high-Q 2 charged current deep inelastic scattering cross sections with a longitudinally polarised positron beam at HERA, Eur. Phys. J. C 70 (2010) 945 [arXiv:1008.3493] [INSPIRE].

  56. ZEUS collaboration, Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass, JHEP 09 (2014) 127 [arXiv:1405.6915] [INSPIRE].

  57. H1 collaboration, Measurement of the Charm and Beauty Structure Functions using the H1 Vertex Detector at HERA, Eur. Phys. J. C 65 (2010) 89 [arXiv:0907.2643] [INSPIRE].

  58. ZEUS collaboration, Measurement of the diffractive structure function F2(D(4)) at HERA, Eur. Phys. J. C 1 (1998) 81 [hep-ex/9709021] [INSPIRE].

  59. G.M. Briskin, Diffractive Dissociation in ep Deep Inelastic Scattering, Ph.D. Thesis, Tel Aviv University, Tel Aviv Israel (1998), Report DESY-THESIS 1998-036.

  60. S.D. Ellis and D.E. Soper, Successive combination jet algorithm for hadron collisions, Phys. Rev. D 48 (1993) 3160 [hep-ph/9305266] [INSPIRE].

  61. S. Catani, Y.L. Dokshitzer and B.R. Webber, The K -clustering algorithm for jets in deep inelastic scattering and hadron collisions, Phys. Lett. B 285 (1992) 291 [INSPIRE].

    ADS  Article  Google Scholar 

  62. S. Catani, Y.L. Dokshitzer, M.H. Seymour and B.R. Webber, Longitudinally invariant K t clustering algorithms for hadron hadron collisions, Nucl. Phys. B 406 (1993) 187 [INSPIRE].

    ADS  Article  Google Scholar 

  63. K. Rose, E. Gurewitz and G.C. Fox, Statistical mechanics and phase transitions in clustering, Phys. Rev. Lett. 65 (1990) 945.

    ADS  Article  Google Scholar 

  64. K. Rose, Deterministic annealing for clustering, compression, classification, regression, and related optimization problems, IEEE Proc. 86 (1998) 2210.

    Article  Google Scholar 

  65. F. Didierjean, G. Duchêne and A. Lopez-Martens, The Deterministic Annealing Filter: A new clustering method for γ-ray tracking algorithms, Nucl. Instrum. Meth. A 615 (2010) 188.

    ADS  Article  Google Scholar 

  66. ZEUS collaboration, Measurement of high-Q 2 charged current cross sections in e + p deep inelastic scattering at HERA, Eur. Phys. J. C 32 (2003) 1.

  67. J. Blümlein, A. Hasselhuhn and T. Pfoh, The O(α 2 s ) heavy quark corrections to charged current deep-inelastic scattering at large virtualities, Nucl. Phys. B 881 (2014) 1 [arXiv:1401.4352] [INSPIRE].

    ADS  Article  MATH  Google Scholar 

  68. A. Accardi et al., Electron Ion Collider: The Next QCD Frontier, Eur. Phys. J. A 52 (2016) 268 [arXiv:1212.1701] [INSPIRE].

    ADS  Article  Google Scholar 

  69. LHeC Study Group collaboration, A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector, J. Phys. G 39 (2012) 075001 [arXiv:1206.2913] [INSPIRE].

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Correspondence to M. Wing.

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ArXiv ePrint: 1904.03261

INFN Bologna, Bologna, Italy (supported by the Italian National Institute for Nuclear Physics (INFN))

Physikalisches Institut der Universität Bonn, Bonn, Germany (supported by the German Federal Ministry for Education and Research (BMBF), under contract No. 05 H09PDF)

Calabria University, Physics Department and INFN, Cosenza, Italy (supported by the Italian National Institute for Nuclear Physics (INFN))

National Centre for Particle Physics, Universiti Malaya, 50603 Kuala Lumpur, Malaysia (supported by HIR grant UM.C/625/1/HIR/149 and UMRG grants RU006-2013, RP012A-13AFR and RP012B-13AFR from Universiti Malaya, and ERGS grant ER004-2012A from the Ministry of Education, Malaysia)

Department of Physics, Jagellonian University, Krakow, Poland (supported by the Polish National Science Centre (NCN) grant no. DEC- 2014/13/B/ST2/02486)

School of Physics and Astronomy, University of Glasgow, Glasgow, U.K. (supported by the Science and Technology Facilities Council, U.K.)

Hamburg University, Institute of Experimental Physics, Hamburg, Germany (supported by the German Federal Ministry for Education and Research (BMBF), under contract No. 05h09GUF, and the SFB 676 of the Deutsche Forschungsgemein- schaft (DFG))

Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan (supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and its grants for Scientific Research)

Department of Physics, University of Oxford, Oxford, U.K. (supported by the Science and Technology Facilities Council, U.K.)

INFN Padova, Padova, Italy (supported by the Italian National Institute for Nuclear Physics (INFN))

Dipartimento di Fisica e Astronomia dell’Università and INFN, Padova, Italy (supported by the Italian National Institute for Nuclear Physics (INFN))

Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv, Israel (supported by the Israel Science Foundation)

Department of Physics, Temple University, Philadelphia, PA 19122, U.S.A. (supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science)

Department of Physics, Tokyo Institute of Technology, Tokyo, Japan (supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and its grants for Scientific Research)

Università di Torino and INFN, Torino, Italy (supported by the Italian National Institute for Nuclear Physics (INFN))

Università del Piemonte Orientale, Novara, and INFN, Torino, Italy (supported by the Italian National Institute for Nuclear Physics (INFN))

Physics and Astronomy Department, University College London, London, U.K. (supported by the Science and Technology Facilities Council, U.K.)

Department of Physics, York University, Ontario, M3J 1P3 J, Canada (supported by the Natural Sciences and Engineering Research Council of Canada (NSERC))

Alexander von Humboldt Professor (B. Foster)

Supported by DESY (M. Wing)

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The ZEUS collaboration., Abt, I., Adamczyk, L. et al. Charm production in charged current deep inelastic scattering at HERA. J. High Energ. Phys. 2019, 201 (2019). https://doi.org/10.1007/JHEP05(2019)201

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Keywords

  • Heavy quark production
  • Lepton-Nucleon Scattering (experiments)
  • QCD
  • Electroweak interaction