@article{3191966,
    title = "Study of central exclusive pi(+)pi(-) production in proton-proton
collisions at root s=5.02 and 13 TeV",
    author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and and Bergauer, T. and Brandstetter, J. and Dragicevic, M. and Ero, J. and Del and Valle, A. Escalante and Flechl, M. and Fruhwirth, R. and Jeitler, M. and and Krammer, N. and Kratschmer, I and Liko, D. and Madlener, T. and Mikulec, and I and Rad, N. and Schieck, J. and Schofbeck, R. and Spanring, M. and and Spitzbart, D. and Waltenberger, W. and Wittmann, J. and Wulz, C-E and and Zarucki, M. and Drugakov, V and Mossolov, V and Gonzalez, J. Suarez and and Darwish, M. R. and De Wolf, E. A. and Di Croce, D. and Janssen, X. and and Lauwers, J. and Lelek, A. and Pieters, M. and Sfar, H. Rejeb and Van and Haevermaet, H. and Van Mechelen, P. and Van Putte, S. and Van Remortel, and N. and Blekman, F. and Bols, E. S. and Chhibra, S. S. and D'Hondt, J. and and De Clercq, J. and Lontkovskyi, D. and Lowette, S. and Marchesini, I and and Moortgat, S. and Moreels, L. and Python, Q. and Skovpen, K. and and Tavernier, S. and Van Doninck, W. and Van Mulders, P. and Van Parijs, I and and Beghin, D. and Bilin, B. and Brun, H. and Clerbaux, B. and De and Lentdecker, G. and Delannoy, H. and Dorney, B. and Favart, L. and and Grebenyuk, A. and Kalsi, A. K. and Luetic, J. and Popov, A. and Postiau, and N. and Starling, E. and Thomas, L. and Vander Velde, C. and Vanlaer, P. and and Vannerom, D. and Wang, Q. and Cornelis, T. and Dobur, D. and and Khvastunov, I and Roskas, C. and Trocino, D. and Tytgat, M. and Verbeke, and W. and Vermassen, B. and Vit, M. and Zaganidis, N. and Bondu, O. and and Bruno, G. and Caputo, C. and David, P. and Delaere, C. and Delcourt, M. and and Giammanco, A. and Krintiras, G. and Lemaitre, V and Magitteri, A. and and Piotrzkowski, K. and Prisciandaro, J. and Saggio, A. and Marono, M. and Vidal and Vischia, P. and Zobec, J. and Alves, F. L. and Alves, G. A. and and Correia Silva, G. and Hensel, C. and Moraes, A. and Rebello Teles, and P. and Batista Das Chagas, E. Belchior and Carvalho, W. and Chinellato, and J. and Coelho, E. and Da Costa, E. M. and Da Silveira, G. G. and De and Jesus Damiao, D. and De Oliveira Martins, C. and Fonseca De Souza, S. and and Huertas Guativa, L. 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    journal = "The European Physical Journal C - Particles and Fields",
    year = "2020",
    volume = "80",
    number = "8",
    publisher = "Springer-Verlag",
    issn = "1434-6044, 1434-6052",
    doi = "10.1140/epjc/s10052-020-8166-5",
    abstract = "Central exclusive and semiexclusive production of pi(+)pi(-) pairs is
measured with the CMS detector in proton-proton collisions at the LHC at
center-of-mass energies of 5.02 and 13 TeV. The theoretical description
of these non-perturbative processes, which have not yet been measured in
detail at the LHC, poses a significant challenge to models. The two
pions are measured and identified in the CMS silicon tracker based on
specific energy loss, whereas the absence of other particles is ensured
by calorimeter information. The total and differential cross sections of
exclusive and semiexclusive central pi(+)pi(-) production are measured
as functions of invariant mass, transverse momentum, and rapidity of the
pi(+)pi(-) system in the fiducial region defined as transverse momentum
p(T)(p) > 0.2GeV and pseudorapidity vertical bar eta(p)vertical bar <
2.4. The production cross sections for the four resonant channels
f(0)(500), rho(0) (770), f(0)(980), and f(2)(1270) are extracted using a
simple model. These results represent the first measurement of this
process at the LHC collision energies of 5.02 and 13 TeV."
}