@article{3161833,
    title = "Measurement of four-jet production in proton-proton collisions at root
s=7 TeV",
    author = "Chatrchyan, S. and Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and and Adam, W. and Bergauer, T. and Dragicevic, M. and Eroe, J. and and Fabjan, C. and Friedl, M. and Fruehwirth, R. and Ghete, V. M. and Hartl, and C. and Hoermann, N. and Hrubec, J. and Jeitler, M. and Kiesenhofer, W. and and Knuenz, V. and Krammer, M. and Kraetschmer, I. and Liko, D. and and Mikulec, I. and Rabady, D. and Rahbaran, B. and Rohringer, H. and and Schoefbeck, R. and Strauss, J. and Taurok, A. and Treberer-Treberspurg, and W. and Waltenberger, W. and Wulz, C. -E. and Mossolov, V. and Shumeiko, and N. and Gonzalez, J. Suarez and Alderweireldt, S. and Bansal, M. and and Bansal, S. and Cornelis, T. and De Wolf, E. A. and Janssen, X. and and Knutsson, A. and Luyckx, S. and Mucibello, L. and Ochesanu, S. and and Roland, B. and Rougny, R. and Van Haevermaet, H. and Van Mechelen, P. and and Van Remortel, N. and Van Spilbeeck, A. and Blekman, F. and Blyweert, and S. and D'Hondt, J. and Heracleous, N. and Kalogeropoulos, A. and and Keaveney, J. and Kim, T. J. and Lowette, S. and Maes, M. and Olbrechts, and A. and Strom, D. and Tavernier, S. and Van Doninck, W. and Van Mulders, and P. and Van Onsem, G. P. and Villella, I. and Caillol, C. and Clerbaux, and B. and De Lentdecker, G. and Favart, L. and Gay, A. P. R. and Leonard, and A. and Marage, P. E. and Mohammadi, A. and Pernie, L. and Reis, T. and and Seva, T. and Thomas, L. and Velde, C. Vander and Vanlaer, P. and Wang, and J. and Adler, V. and Beernaert, K. and Benucci, L. and Cimmino, A. and and Costantini, S. and Dildick, S. and Garcia, G. and Klein, B. and and Lellouch, J. and Mccartin, J. and Rios, A. A. Ocampo and Ryckbosch, D. and and Diblen, S. Salva and Sigamani, M. and Strobbe, N. and Thyssen, F. and and Tytgat, M. and Walsh, S. and Yazgan, E. and Zaganidis, N. and and Basegmez, S. and Beluffi, C. and Bruno, G. and Castello, R. and Caudron, and A. and Ceard, L. and Da Silveira, G. G. and Delaere, C. and du Pree, T. and and Favart, D. and Forthomme, L. and Giammanco, A. and Hollar, J. and and Jez, P. and Komm, M. and Lemaitre, V. and Liao, J. and Militaru, O. and and Nuttens, C. and Pagano, D. and Pin, A. and Piotrzkowski, K. and Popov, and A. and Quertenmont, L. and Selvaggi, M. and Marono, M. Vidal and Garcia, and J. M. Vizan and Beliy, N. and Caebergs, T. and Daubie, E. and Hammad, G. and H. and Alves, G. A. and Correa Martins Junior, M. and Martins, T. and and Pol, M. E. and Souza, M. H. G. and Alda Junior, W. L. and Carvalho, W. and and Chinellato, J. and Custodio, A. and Da Costa, E. 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    journal = "Physical Review D",
    year = "2014",
    volume = "89",
    number = "9",
    publisher = "AMER PHYSICAL SOC",
    issn = "2470-0010, 2470-0029",
    doi = "10.1103/PhysRevD.89.092010",
    abstract = "Measurements of the differential cross sections for the production of
exactly four jets in proton-proton collisions are presented as a
function of the transverse momentum p(T) and pseudorapidity eta,
together with the correlations in azimuthal angle and the p(T) balance
among the jets. The data sample was collected in 2010 at a
center-of-mass energy of 7 TeV with the CMS detector at the LHC, with an
integrated luminosity of 36 pb(-1). The cross section for exactly four
jets, with two hard jets of p(T) > 50 GeV each, together with two jets
of p(T) > 20 GeV each, within vertical bar eta vertical bar < 4.7 is
measured to be sigma = 330 +/- 5(stat.) +/- 45(syst.) nb. It is found
that fixed-order matrix element calculations including parton showers
describe the measured differential cross sections in some regions of
phase space only, and that adding contributions from double parton
scattering brings the Monte Carlo predictions closer to the data."
}