Measurement of the cross section for hard exclusive pi(0) muoproduction on the proton

M. G. Alexeev,G. D. Alexeev,A. Amoroso,V Andrieux, V Anfimov N., V Anosov,A. Antoshkin, K. Augsten, W. Augustyniaka,C. D. R. Azevedo,B. Badelek, F. Balestra,M. Ball,J. Barth,R. Beck,Y. Bedfer,J. Bernhard,M. Bodlak,P. Bordalo, F. Bradamante,A. Bressan,M. Buechele,V. E. Burtsev,W-C Chang,C. Chatterjee,M. Chiosso,A. G. Chumakov,S-U Chung, A. Cicuttin,M. L. Crespo,S. Dalla Torre,S. S. Dasgupta,S. Dasgupta,O. Yu Denisov,L. Dhara, V Donskov S.,N. Doshita,Ch Dreisbach,W. Duennweber,R. R. Dusaev,A. Efremov,P. D. Eversheim,M. Faessler,A. Ferrero,Jr. Finger M.,H. Fischer,C. Franco,N. du Fresne von Hohenesche,J. M. Friedrich,V Frolov,E. Fuchey,F. Gautheron,O. P. Gavrichtchouk,S. Gerassimov, J. Giarra,I Gnesi,M. Gorzellik, A. Grasso,A. Gridin, M. Grosse Perdekampa,B. Grube,A. Guskov, D. Hahne, G. Hamar,D. von Harrach,R. Heitz,F. Herrmann,N. Horikawa,N. d'Hose,C-Y Hsieh,S. Huber,S. Ishimoto,A. Ivanov, T. Iwata,M. Jandek, V Jary,R. Joosten,P. Joerg, K. Juraskova,E. Kabuss, F. Kaspar,A. Kerbizi,B. Ketzer, V Khaustov G.,Yu A. Khokhlov,Yu Kisselev,F. Klein,J. H. Koivuniemi,V. N. Kolosov,K. Kondo Horikawa, I Konorov,V. F. Konstantinov,A. M. Kotzinian,O. M. Kouznetsov,Z. Kral,M. Kraemer,F. Krinner, V Kroumchtein Z.,Y. Kulinich,F. Kunne, K. Kurek,R. P. Kurjata, A. Kveton,S. Levorato,Y-S Lian,J. Lichtenstadt,P-J Lin,R. Longo,V. E. Lyubovitskij,A. Maggiora,A. Magnon, N. Makins,N. Makke,G. K. Mallot,S. A. Mamon, B. Marianski,A. Martin,J. Marzec,J. Matousek,T. Matsuda, V Meshcheryakov G.,M. Meyer,W. Meyer,V Mikhailov Yu,M. Mikhasenko,E. Mitrofanov,N. Mitrofanov,Y. Miyachi,A. Moretti,C. Naim,A. Nagaytsev,D. Neyret, J. Novy,W-D Nowak,G. Nukazuka,A. S. Nunes,A. G. Olshevsky,M. Ostrick,D. Panzieri,B. Parsamyan,S. Paul,J-C Peng,F. Pereira,M. Pesek, V Peshekhonov D.,M. Peskova,N. Pierre,S. Platchkov,J. Pochodzalla,V. A. Polyakov,J. Pretz,M. Quaresma,C. Quintans,S. Ramos, C. Regali, G. Reicherz,C. Riedl, I Ryabchikov D.,A. Rybnikov,A. Rychter,V. D. Samoylenko,A. Sandacz,S. Sarkar,I. A. Savin,G. Sbrizzai, H. Schmieden,A. Selyunin,L. Silva,L. Sinha,M. Slunecka,J. Smolik,A. Srnka,D. Steffen,M. Stolarski,O. Subrt, M. Sulc,H. Suzuki,A. Szabelski, T. Szameitat,P. Sznajder,S. Tessaro,F. Tessarotto,A. Thiel, J. Tomsa,F. Tosello,V Tskhay,S. Uhl, I Vasilishin B.,A. Vauth,B. M. Veit,J. Veloso,A. Vidon,M. Virius,M. Wagner,S. Wallner,M. Wilfert,K. Zaremba,P. Zavada,M. Zavertyaev,E. Zemlyanichkina,Y. Zhao,M. Ziembicki

PHYSICS LETTERS B（2020）

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摘要

We report on a measurement of hard exclusive pi(0) muoproduction on the proton by COMPASS using 160GeV/cpolarised mu+ and mu- beams of the CERN SPS impinging on a liquid hydrogen target. From the average of the measured mu+ and mu- cross sections, the virtual-photon proton cross section is determined as a function of the squared four-momentum transfer between initial and final proton in the range 0.08 (GeV/c)(2) 更多

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关键词

Quantum chromodynamics,Muoproduction,Hard exclusive meson production,Generalised Parton Distributions,COMPASS

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