Measurement of D 0 , D + , D S + and D *+ Production in Fixed Target 920 GeV Proton–nucleus Collisions

I. Abt,M. Adams,M. Agari,H. Albrecht,A. Aleksandrov,V. Amaral,A. Amorim,S.J. Aplin,V. Aushev,Y. Bagaturia,V. Balagura,M. Bargiotti,O. Barsukova,J. Bastos,J. Batista,C. Bauer,T.S. Bauer,A. Belkov,I. Belotelov,A. Bertin,B. Bobchenko,M. Böcker, A. Bogatyrev,G. Bohm,M. Bräuer,M. Bruinsma,M. Bruschi,P. Buchholz,T. Buran,J. Carvalho,P. Conde,C. Cruse,M. Dam,K.M. Danielsen,M. Danilov,S. De Castro,H. Deppe,X. Dong,H.B. Dreis,V. Egorytchev,K. Ehret,F. Eisele,D. Emeliyanov,S. Essenov,L. Fabbri,P. Faccioli,M. Feuerstack-Raible,J. Flammer,B. Fominykh,M. Funcke,L. Garrido,A. Gellrich,B. Giacobbe,J. Gläß,D. Goloubkov,Y. Golubkov,A. Golutvin,I. Golutvin,I. Gorbounov,A. Gorišek,O. Gouchtchine,D.C. Goulart, S. Gradl,W. Gradl,F. Grimaldi,J. Groth-Jensen,Y. Guilitsky,J.D. Hansen,J.M. Hernández,W. Hofmann,M. Hohlmann,T. Hott,W. Hulsbergen,U. Husemann,O. Igonkina,M. Ispiryan,T. Jagla,C. Jiang,H. Kapitza,S. Karabekyan,N. Karpenko,S. Keller,J. Kessler,F. Khasanov,Y. Kiryushin,I. Kisel,E. Klinkby,K.T. Knöpfle,H. Kolanoski,S. Korpar,C. Krauss,P. Kreuzer,P. Križan,D. Krücker,S. Kupper,T. Kvaratskheliia,A. Lanyov,K. Lau,B. Lewendel,T. Lohse,B. Lomonosov,R. Männer,R. Mankel,S. Masciocchi,I. Massa,I. Matchikhilian,G. Medin,M. Medinnis,M. Mevius,A. Michetti,Y. Mikhailov,R. Mizuk,R. Muresan,M. zur Nedden,M. Negodaev,M. Nörenberg,S. Nowak,M.T. Núñez Pardo de Vera,M. Ouchrif,F. Ould-Saada,C. Padilla,D. Peralta,R. Pernack,R. Pestotnik,B.A.A. Petersen,M. Piccinini,M.A. Pleier,M. Poli,V. Popov,D. Pose,S. Prystupa,V. Pugatch,Y. Pylypchenko,J. Pyrlik,K. Reeves,D. Reßing,H. Rick,I. Riu,P. Robmann,I. Rostovtseva,V. Rybnikov,F. Sánchez,A. Sbrizzi,M. Schmelling, B. Schmidt,A. Schreiner,H. Schröder,U. Schwanke,A.J. Schwartz,A.S. Schwarz,B. Schwenninger,B. Schwingenheuer,F. Sciacca,N. Semprini-Cesari,S. Shuvalov,L. Silva,D. Škrk,L. Sözüer,S. Solunin,A. Somov,S. Somov,J. Spengler,R. Spighi, A. Spiridonov, A. Stanovnik,M. Starič,C. Stegmann,H.S. Subramania,M. Symalla,I. Tikhomirov,M. Titov,I. Tsakov,U. Uwer,C. van Eldik,Y. Vassiliev,M. Villa,A. Vitale,I. Vukotic,H. Wahlberg,A.H. Walenta,M. Walter,J.J. Wang, D. Wegener,U. Werthenbach,H. Wolters,R. Wurth,A. Wurz,S. Xella-Hansen,Y. Zaitsev,M. Zavertyaev,T. Zeuner,A. Zhelezov,Z. Zheng,R. Zimmermann,T. Živko,A. Zoccoli, The HERA-B Collaboration

European physical journal C, Particles and fields（2007）

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摘要

The inclusive production cross sections of the charmed mesons D-0,D+,D-s(+) and D*(+) have been measured in interactions of 920 GeV protons on C, Ti, and W targets with the HERA-B detector at the HERA storage ring. Differential cross sections as a function of transverse momentum and Feynman's x variable are given for the central rapidity region and for transverse momenta up to p(T)=3.5 GeV/c. The atomic mass number dependence and the leading to non-leading particle production asymmetries are presented as well.

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关键词

Production Cross Section,Invariant Mass Distribution,Primary Vertex,Signal Window,Full Phase Space

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