Abstract
H1 and ZEUS have published single-differential cross sections for inclusive D ∗±-meson production in deep-inelastic ep scattering at HERA from their respective final data sets. These cross sections are combined in the common visible phase-space region of photon virtuality Q 2 > 5 GeV2, electron inelasticity 0.02 < y < 0.7 and the D ∗± meson’s transverse momentum p T(D ∗) > 1.5 GeV and pseudorapidity |η(D ∗)| < 1.5. The combination procedure takes into account all correlations, yielding significantly reduced experimental uncertainties. Double-differential cross sections d2 σ/dQ 2dy are combined with earlier D ∗± data, extending the kinematic range down to Q 2 > 1.5 GeV2. Perturbative next-to-leading-order QCD predictions are compared to the results.
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References
H1 collaboration, C. Adloff et al., Inclusive D 0 and D ∗± production in deep inelastic ep scattering at HERA, Z. Phys. C 72 (1996) 593 [hep-ex/9607012] [INSPIRE].
ZEUS collaboration, J. Breitweg et al., D* production in deep inelastic scattering at HERA, Phys. Lett. B 407 (1997) 402 [hep-ex/9706009] [INSPIRE].
H1 collaboration, C. Adloff et al., Measurement of D* meson cross-sections at HERA and determination of the gluon density in the proton using NLO QCD, Nucl. Phys. B 545 (1999) 21 [hep-ex/9812023] [INSPIRE].
ZEUS collaboration, J. Breitweg et al., Measurement of D ∗± production and the charm contribution to F 2 in deep inelastic scattering at HERA, Eur. Phys. J. C 12 (2000) 35 [hep-ex/9908012] [INSPIRE].
H1 collaboration, C. Adloff et al., Measurement of D ∗± meson production and F c2 in deep inelastic scattering at HERA, Phys. Lett. B 528 (2002) 199 [hep-ex/0108039] [INSPIRE].
ZEUS collaboration, S. Chekanov et al., Measurement of D ∗± production in deep inelastic e ± p scattering at DESY HERA, Phys. Rev. D 69 (2004) 012004 [hep-ex/0308068] [INSPIRE].
H1 collaboration, A. Aktas et al., Inclusive production of D + , D 0 , D + s and D ∗+ mesons in deep inelastic scattering at HERA, Eur. Phys. J. C 38 (2005) 447 [hep-ex/0408149] [INSPIRE].
H1 collaboration, A. Aktas et al., Measurement of \( {F}_2^{c\overline{c}} \) and \( {F}_2^{b\overline{b}} \) at high Q 2 using the H1 vertex detector at HERA, Eur. Phys. J. C 40 (2005) 349 [hep-ex/0411046] [INSPIRE].
H1 collaboration, A. Aktas et al., Measurement of \( {F}_2^{c\overline{c}} \) and \( {F}_2^{b\overline{b}} \) at low Q 2 and x ∗ using the H1 vertex detector at HERA, Eur. Phys. J. C 45 (2006) 23 [hep-ex/0507081] [INSPIRE].
H1 collaboration, A. Aktas et al., Production of D ∗± Mesons with Dijets in Deep-Inelastic Scattering at HERA, Eur. Phys. J. C 51 (2007) 271 [hep-ex/0701023] [INSPIRE].
ZEUS collaboration, S. Chekanov et al., Measurement of D mesons production in deep inelastic scattering at HERA, JHEP 07 (2007) 074 [arXiv:0704.3562] [INSPIRE].
ZEUS collaboration, S. Chekanov et al., Measurement of D ± and D 0 production in deep inelastic scattering using a lifetime tag at HERA, Eur. Phys. J. C 63 (2009) 171 [arXiv:0812.3775] [INSPIRE].
ZEUS collaboration, S. Chekanov et al., Measurement of charm and beauty production in deep inelastic ep scattering from decays into muons at HERA, Eur. Phys. J. C 65 (2010) 65 [arXiv:0904.3487] [INSPIRE].
H1 collaboration, F.D. Aaron et al., 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].
H1 collaboration, F.D. Aaron et al., Measurement of the D ∗± Meson Production Cross Section and \( {F}_2^{c\overline{c}} \) , at High Q 2 , in ep Scattering at HERA, Phys. Lett. B 686 (2010) 91 [arXiv:0911.3989] [INSPIRE].
ZEUS collaboration, H. Abramowicz et al., Measurement of D + and Λ + c production in deep inelastic scattering at HERA, JHEP 11 (2010) 009 [arXiv:1007.1945] [INSPIRE].
H1 collaboration, F.D. Aaron et al., Measurement of Charm and Beauty Jets in Deep Inelastic Scattering at HERA, Eur. Phys. J. C 71 (2011) 1509 [arXiv:1008.1731] [INSPIRE].
H1 collaboration, F.D. Aaron et al., Measurement of D ∗± Meson Production and Determination of \( {F}_2^{c\overline{c}} \) at low Q 2 in Deep-Inelastic Scattering at HERA, Eur. Phys. J. C 71 (2011) 1769 [Erratum ibid. C 72 (2012) 2252] [arXiv:1106.1028] [INSPIRE].
ZEUS collaboration, H. Abramowicz et al., Measurement of D ± production in deep inelastic ep scattering with the ZEUS detector at HERA, JHEP 05 (2013) 023 [arXiv:1302.5058] [INSPIRE].
ZEUS collaboration, H. Abramowicz et al., Measurement of D ∗± production in deep inelastic scattering at HERA, JHEP 05 (2013) 097 [Erratum ibid. 02 (2014) 106] [arXiv:1303.6578] [INSPIRE].
ZEUS and H1 collaborations, H. Abramowicz et al., Combination and QCD Analysis of Charm Production Cross Section Measurements in Deep-Inelastic ep Scattering at HERA, Eur. Phys. J. C 73 (2013) 2311 [arXiv:1211.1182] [INSPIRE].
A. Glazov, Averaging of DIS cross section data, in the proceedings of 13th International Workshop on Deep Inelastic Scattering (DIS 2005), Madison, Wisconsin U.S.A., 27 April-1 May 2005, W.H. Smith and S.R. Dasu eds., AIP Publishing LLC., Melville New York U.S.A. (2005) [AIP Conf. Proc. 792 (2005) 237] [INSPIRE].
H1 collaboration, F.D. Aaron et al., Measurement of the Inclusive ep Scattering Cross Section at Low Q 2 and x at HERA, Eur. Phys. J. C 63 (2009) 625 [arXiv:0904.0929] [INSPIRE].
ZEUS and H1 collaborations, F.D. Aaron et al., Combined Measurement and QCD Analysis of the Inclusive e ± p Scattering Cross Sections at HERA, JHEP 01 (2010) 109 [arXiv:0911.0884] [INSPIRE].
E. Laenen, S. Riemersma, J. Smith and W.L. van Neerven, On the heavy quark content of the nucleon, Phys. Lett. B 291 (1992) 325 [INSPIRE].
E. Laenen, S. Riemersma, J. Smith and W.L. van Neerven, Complete O(α s) corrections to heavy flavor structure functions in electroproduction, Nucl. Phys. B 392 (1993) 162 [INSPIRE].
E. Laenen, S. Riemersma, J. Smith and W.L. van Neerven, O(α s) corrections to heavy flavor inclusive distributions in electroproduction, Nucl. Phys. B 392 (1993) 229 [INSPIRE].
S. Riemersma, J. Smith and W.L. van Neerven, Rates for inclusive deep inelastic electroproduction of charm quarks at HERA, Phys. Lett. B 347 (1995) 143 [hep-ph/9411431] [INSPIRE].
B.W. Harris and J. Smith, Charm quark and D ∗± cross-sections in deeply inelastic scattering at HERA, Phys. Rev. D 57 (1998) 2806 [hep-ph/9706334] [INSPIRE].
HERAFitter-0.2.1, https://www.herafitter.org/HERAFitter/.
S. Alekhin, J. Blumlein and S. Moch, Parton Distribution Functions and Benchmark Cross Sections at NNLO, Phys. Rev. D 86 (2012) 054009 [arXiv:1202.2281] [INSPIRE].
A.D. Martin, W.J. Stirling, R.S. Thorne and G. Watt, Heavy-quark mass dependence in global PDF analyses and 3- and 4-flavour parton distributions, Eur. Phys. J. C 70 (2010) 51 [arXiv:1007.2624] [INSPIRE].
V.G. Kartvelishvili, A.K. Likhoded and V.A. Petrov, On the Fragmentation Functions of Heavy Quarks Into Hadrons, Phys. Lett. B 78 (1978) 615 [INSPIRE].
E. Lohrmann, A Summary of Charm Hadron Production Fractions, arXiv:1112.3757 [INSPIRE].
D.J. Lange, The EvtGen particle decay simulation package, Nucl. Instrum. Meth. A 462 (2001) 152 [INSPIRE].
C. Peterson, D. Schlatter, I. Schmitt and P.M. Zerwas, Scaling violations in inclusive e + e − annihilation spectra, Phys. Rev. D 27 (1983) 105 [INSPIRE].
ZEUS collaboration, H. Abramowicz et al., Measurement of beauty production in deep inelastic scattering at HERA using decays into electrons, Eur. Phys. J. C 71 (2011) 1573 [arXiv:1101.3692] [INSPIRE].
Particle Data Group collaboration, K.A. Olive et al., Review of Particle Physics, Chin. Phys. C 38 (2014) 090001 [INSPIRE].
H1 collaboration, I. Abt et al., The H1 detector at HERA, Nucl. Instrum. Meth. A 386 (1997) 310 [INSPIRE].
H1 collaboration, I. Abt et al., The Tracking, calorimeter and muon detectors of the H1 experiment at HERA, Nucl. Instrum. Meth. A 386 (1997) 348 [INSPIRE].
H1 SPACAL Group collaboration, R.D. Appuhn et al., The H1 lead/scintillating fiber calorimeter, Nucl. Instrum. Meth. A 386 (1997) 397 [INSPIRE].
ZEUS collaboration, U. Holm ed., ZEUS. A Detector for HERA, DESY (1993) and available online at http://www-zeus.desy.de/bluebook/bluebook.html.
N. Harnew et al., Vertex Triggering Using Time Difference Measurements in the ZEUS Central Tracking Detector, Nucl. Instrum. Meth. A 279 (1989) 290 [INSPIRE].
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. 32 (1993) 181 [INSPIRE].
ZEUS collaboration, B. Foster et al., The Design and construction of the ZEUS central tracking detector, Nucl. Instrum. Meth. A 338 (1994) 254 [INSPIRE].
J. Kretzschmar, A precision measurement of the proton structure function F 2 with the H1 experiment, Ph.D. Thesis, Humboldt University, Berlin Germany (2008) and online at http://www-h1.desy.de/publications/theses list.html.
D. Pitzl et al., The H1 silicon vertex detector, Nucl. Instrum. Meth. A 454 (2000) 334 [hep-ex/0002044] [INSPIRE].
I. Glushkov, D ∗ meson production in deep inelastic electron-proton scattering with the forward and backward silicon trackers of the H1 experiment at HERA, Ph.D. Thesis, Humboldt University, Berlin Germany (2008) and online at http://www-h1.desy.de/publications/theses list.html.
ZEUS collaboration, 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].
H1 Calorimeter Group collaboration, B. Andrieu et al., The H1 liquid argon calorimeter system, Nucl. Instrum. Meth. A 336 (1993) 460 [INSPIRE].
M. Derrick et al., Design and construction of the ZEUS barrel calorimeter., Nucl. Instrum. Meth. A 309 (1991) 77 [INSPIRE].
ZEUS and ZEUS Calorimeter Group collaborations, A. Andresen et al., Construction and beam test of the ZEUS forward and rear calorimeter, Nucl. Instrum. Meth. A 309 (1991) 101 [INSPIRE].
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].
ZEUS Barrel Calorimeter Group collaboration, A. Bernstein et al., Beam tests of the ZEUS barrel calorimeter, Nucl. Instrum. Meth. A 336 (1993) 23 [INSPIRE].
H1 Calorimeter Group collaboration, B. Andrieu et al., Results from pion calibration runs for the H1 liquid argon calorimeter and comparisons with simulations, Nucl. Instrum. Meth. A 336 (1993) 499 [INSPIRE].
H1 SPACAL Group collaboration, T. Nicholls et al., Performance of an electromagnetic lead/scintillating fiber calorimeter for the H1 detector, Nucl. Instrum. Meth. A 374 (1996) 149 [INSPIRE].
ZEUS collaboration, L. Adamczyk et al., Measurement of the Luminosity in the ZEUS Experiment at HERA II, Nucl. Instrum. Meth. A 744 (2014) 80 [arXiv:1306.1391] [INSPIRE].
U. Schneekloth, The HERA luminosity upgrade, DESY-HERA-98-05 (1998) [INSPIRE].
HERAverager-0.0.1, https://wiki-zeuthen.desy.de/HERAverager.
O. Zenaiev, Charm Production and QCD Analysis at HERA and LHC, Ph.D. Thesis, Hamburg University, Hamburg Germany (2015).
O. Behnke et al., Benchmark cross sections for heavy flavour production, doi:10.5170/CERN-2005-014.405 in A. de Roeck and H. Jung eds., HERA and the LHC, doi:10.5170/CERN-2005-014 [hep-ph/0601164] [INSPIRE].
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ArXiv ePrint: 1503.06042
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Y. Aushev, A. Iudin and R. Shevchenko were Member of National Technical University of Ukraine.
B. Foster was Alexander von Humboldt Professor.
W. Perlanski was a Member of Lódz University, Poland.
O. Shkola was a Member of National University of Kyiv - Mohyla Academy, Kyiv, Ukraine.
M. Wing was supported by DESY and the Alexander von Humboldt Foundation.
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The H1 and ZEUS collaborations., Abramowicz, H., Abt, I. et al. Combination of differential D∗± cross-section measurements in deep-inelastic ep scattering at HERA. J. High Energ. Phys. 2015, 149 (2015). https://doi.org/10.1007/JHEP09(2015)149
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DOI: https://doi.org/10.1007/JHEP09(2015)149