Measurement of single-diffractive dijet production in proton-proton collisions at √s=8 TeV with the CMS and TOTEM experiments

被引:0
作者
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Ambrogi, F. [2 ]
Asilar, E. [2 ]
Bergauer, T. [2 ]
Brandstetter, J. [2 ]
Dragicevic, M. [2 ]
Eroe, J. [2 ]
Del Valle, A. Escalante [2 ]
Flechl, M. [2 ]
Fruehwirth, R. [2 ,203 ]
Ghete, V. M. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ,203 ]
Krammer, N. [2 ]
Kraetschmer, I. [2 ]
Liko, D. [2 ]
Madlener, T. [2 ]
Mikulec, I. [2 ]
Rad, N. [2 ]
Rohringer, H. [2 ]
Schieck, J. [2 ,203 ]
Schoefbeck, R. [2 ]
Spanring, M. [2 ]
Spitzbart, D. [2 ]
Taurok, A. [2 ]
Waltenberger, W. [2 ]
Wittmann, J. [2 ]
Wulz, C. -E. [2 ]
Zarucki, M. [2 ]
Chekhovsky, V. [3 ]
Mossolov, V. [3 ]
Gonzalez, J. Suarez [3 ]
De Wolf, E. A. [4 ]
Di Croce, D. [4 ]
Janssen, X. [4 ]
Lauwers, J. [4 ]
Pieters, M. [4 ]
Van De Klundert, M. [4 ]
Janssen, X. [4 ]
Lauwers, J. [4 ]
Pieters, M. [4 ]
Van De Klundert, M. [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, P. [4 ]
Van Remortel, N. [4 ]
Abu Zeid, S. [5 ]
Blekman, F. [5 ]
D'Hondt, J. [5 ]
机构
[1] Yerevan Phys Inst, Yerevan, Armenia
[2] Inst Hochenergiephys, Vienna, Austria
[3] Inst Nucl Problems, Minsk, BELARUS
[4] Univ Antwerp, Antwerp, Belgium
[5] Vrije Univ Brussel, Brussels, Belgium
[6] Univ Libre Bruxelles, Brussels, Belgium
[7] Univ Ghent, Ghent, Belgium
[8] Catholic Univ Louvain, Louvain, Belgium
[9] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[10] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil
[11] Univ Estadual Paulista, Sao Paulo, Brazil
[12] Univ Fed ABC, Sao Paulo, Brazil
[13] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[14] Univ Sofia, Sofia, Bulgaria
[15] Beihang Univ, Beijing, Peoples R China
[16] Inst High Energy Phys, Beijing, Peoples R China
[17] Peking Univ, State Key Lab Nucl Phys Technol, Beijing, Peoples R China
[18] Tsinghua Univ, Beijing, Peoples R China
[19] Univ Los Andes, Bogota, Colombia
[20] Univ Antioquia, Medellin, Colombia
[21] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[22] Univ Split, Fac Sci, Split, Croatia
[23] Inst Rudjer Boskovic, Zagreb, Croatia
[24] Univ Cyprus, Nicosia, Cyprus
[25] Charles Univ Prague, Prague, Czech Republic
[26] Escuela Politec Nacl, Quito, Ecuador
[27] Univ San Francisco Quito, Quito, Ecuador
[28] Egyptian Network High Energy Phys, Acad Sci Res & Technol Arab Republ Egypt, Cairo, Egypt
[29] NICPB, Tallinn, Estonia
[30] Univ Helsinki, Dept Phys, Helsinki, Finland
[31] Helsinki Inst Phys, Helsinki, Finland
[32] Lappeenranta Univ Technol, Lappeenranta, Finland
[33] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France
[34] Univ Paris Saclay, CNRS, Ecole Polytech, Lab Leprince Ringuet,IN2P3, Palaiseau, France
[35] Univ Strasbourg, CNRS, UMR 7178, IPHC, Strasbourg, France
[36] Ctr Calcul Inst Natl Phys Nucl & Phys Particules, CNRS, IN2P3, Villeurbanne, France
[37] Univ Lyon, Univ Claude Bernard Lyon 1, CNRS, Inst Phys Nucl Lyon,IN2P3, Villeurbanne, France
[38] Georgian Tech Univ, Tbilisi, Georgia
[39] Tbilisi State Univ, Tbilisi, Georgia
[40] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[41] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[42] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[43] Deutch Elektronen Synchrotron, Hamburg, Germany
[44] Univ Hamburg, Hamburg, Germany
[45] Karlsruher Inst Technol, Karlsruhe, Germany
[46] INPP, NCSR Demokritos, Aghia Paraskevi, Greece
[47] Natl & Kapodistrian Univ Athens, Athens, Greece
[48] Natl Tech Univ Athens, Athens, Greece
[49] Univ Ioannina, Ioannina, Greece
[50] Eotvos Lorand Univ, MTA ELTE Lendulet CMS Particle & Nucl Phys Grp, Budapest, Hungary
来源
EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 12期
基金
欧盟地平线“2020”; 美国国家科学基金会; 巴西圣保罗研究基金会; 芬兰科学院; 欧洲研究理事会;
关键词
DEEP-INELASTIC SCATTERING; FRACTURE FUNCTIONS; CROSS-SECTION; RAPIDITY GAPS; QCD ANALYSIS;
D O I
10.1140/epjc/s10052-020-08562-y
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
Measurements are presented of the single-diffractive dijet cross section and the diffractive cross section as a function of the proton fractional momentum loss xi and the four-momentum transfer squared t. Both processes pp -> pX and pp -> Xp, i.e. with the proton scattering to either side of the interaction point, are measured, where X includes at least two jets; the results of the two processes are averaged. The analyses are based on data collected simultaneously with the CMS and TOTEM detectors at the LHC in proton-proton collisions at root s = 8 TeV during a dedicated run with beta* = 90 m at low instantaneous luminosity and correspond to an integrated luminosity of 37.5 nb(-1). The single-diffractive dijet cross section sigma(pX)(jj), in the kinematic region xi < 0.1, with at least two jets with transverse momentum p(T) > 40GeV, and pseudorapidity vertical bar eta vertical bar < 4.4, is 21.7 +/- 0.9(stat)(-3.3)(+3.0)(syst) +/- 0.9(lumi)nb. The ratio of the single-diffractive to inclusive dijet yields, normalised per unit of xi, is presented as a function of x, the longitudinal momentum fraction of the proton carried by the struck parton. The ratio in the kinematic region defined above, for x values in the range -2.9 <= log(10) x <= -1.6, is R = (sigma(pX)(jj)/Delta xi)/sigma(jj) = 0.025 +/- 0.001(stat) +/- 0.003(syst), where sigma(pX)(jj) and sigma(jj) are the single-diffractive and inclusive dijet cross sections, respectively. The results are compared with predictions from models of diffractive and nondiffractive interactions. Monte Carlo predictions based on the HERA diffractive parton distribution functions agree well with the data when corrected for the effect of soft rescattering between the spectator partons.
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