M. Diehl, T. Gousset, and B. Pire, Exclusive production of pion pairs in ??*?? collisions at large Q2, Physical Review D, vol.62, issue.7, p.73014, 2000.
DOI : 10.1103/PhysRevD.62.073014
URL : https://hal.archives-ouvertes.fr/in2p3-00022345

I. F. Ginzburg and V. G. Serbo, Some comments on the total ???? ??? hadron cross section at high energy, Physics Letters B, vol.109, issue.3, p.231, 1982.
DOI : 10.1016/0370-2693(82)90760-2

R. Bizzarri, The L3 energy trigger, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol.283, issue.3, p.799, 1989.
DOI : 10.1016/0168-9002(89)91461-7

V. M. Budnev, The two-photon particle production mechanism. Physical problems. Applications. Equivalent photon approximation, Physics Reports, vol.15, issue.4, p.181, 1975.
DOI : 10.1016/0370-1573(75)90009-5

G. D. Lafferty and T. R. Wyatt, Where to stick your data points: The treatment of measurements within wide bins, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol.355, issue.2-3, p.541, 1995.
DOI : 10.1016/0168-9002(94)01112-5

G. A. Schuler, Two-photon physics with GALUGA 2.0, Computer Physics Communications, vol.108, issue.2-3, p.279, 1998.
DOI : 10.1016/S0010-4655(97)00127-6
URL : http://arxiv.org/abs/hep-ph/9710506

4. V. Anderhub, Andreev, 6,34 F.Anselmo, 8 A, p.26

4. J. Brochu, W. J. Burger, and . Burger, 33 X.D.Cai, 13 M.Capell, 13 G, p.17

2. M. Extermann, Falagan, 25 S.Falciano, 39 A

T. Hatzifotiadou, Hebbeker, 1 A.Hervé, 18 J.Hirschfelder, 35 H.Hofer, 49 M, p.44

2. M. Natale and . Napolitano, 29 F.Nessi-Tedaldi, 49 H, p.49

. Pauluzzi, Paus, 13 F.Pauss, 49 M.Pedace, 39 S.Pensotti, 27 D.Perret-Gallix, 4 B, p.8

4. G. Quartieri and . Rahal-callot, Rahaman, 9 P.Raics, 15 N.Raja, 9 R.Ramelli, 49 P.G.Rancoita, 27 R.Ranieri, 17 A.Raspereza, 48 P.Razis, 30 D, p.49

J. Schotanus, 31 C.Sciacca, 29 L.Servoli, 33 S, p.32

D. Son, 43 C.Souga, 24 P.Spillantini, 17 M, p.9

4. L. Sultanov and . Sun, 22 S.Sushkov, 1 H.Suter, 49, J.D.Swain Z.Szillasi, vol.26, p.5

2. D. Vetlitsky and . Vicinanza, Viertel, 49 S.Villa, 38 M.Vivargent, 4 S.Vlachos, 5 I.Vodopianov, 26 H.Vogel, 35 H, p.31

I. Physikalisches-institut, R. , and D. Aachen, Germany § 2 National Institute for High Energy Physics, NIKHEF, and University of Amsterdam, NL-1009 DB Amsterdam, The Netherlands 3

C. Annecy-le-vieux, C. , and C. , Romania 12 Central Research Institute for Physics of the Hungarian Academy of Sciences, H-1525 Budapest 114, Hungary ? 13 Massachusetts Institute of Technology Chandigarh 160 014, India 15 KLTE-ATOMKI, H-4010 Debrecen, Hungary ¶ 16 Department of Experimental Physics Ireland 17 INFN Sezione di Firenze and University of Florence, I-50125 Florence The Netherlands 32 California Institute of Technology, 28 Institute of Theoretical and Experimental Physics 33 INFN-Sezione di Perugia and Università Degli Studi di Perugia, I-06100 Perugia, Italy 34 Nuclear Physics Institute, pp.5-029, 1211.

-. Di, R. University, and . Rome, La Sapienza " , I-00185 Rome, Italy 40 University and INFN, Salerno, I-84100 Salerno, Italy 41 University of California Central Lab. of Mechatronics and Instrumentation, BU-1113 Sofia, Bulgaria 43 The Center for High Energy Physics, 92093, USA 42 Bulgarian Academy of Sciences § Supported by the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie. ? Supported by the Hungarian OTKA fund under contract numbers T019181, F023259 and T037350. ¶ Also supported by the Hungarian OTKA fund under contract number T026178. ? Supported also by the Comisión Interministerial de Ciencia y Tecnología. ? Also supported by. ? Supported by the National Natural Science Foundation of China, pp.702-701, 1900.