Measurement of \({\varvec{D^{*}}}\) production in diffractive deep inelastic scattering at HERA

Valeri Andreev,A. Baghdasaryan,K. Begzsuren,A.S. Belousov,Arthur Eugen Bolz,V. Boudry,Gerhard Brandt,V. Brisson,D. Britzger,A. Buniatyan,Alexander Bylinkin,L. Bystritskaya,A. J. Campbell,K. B. Cantun Avila,Karel Černý,V. Chekelian,J. G. Contreras,J. Cvach,J.B. Dainton,K. Daum,Cristinel Diaconu,Monica Dobre,V. Dodonov,Guenter Eckerlin,S. Egli,E. E. Elsen,Laurent Favart,A. Fedotov,J. Feltesse,Jozef Ferencei,M. Fleischer,A. Fomenko,E. Gabathuler,J. Gayler,S. Ghazaryan,L. Goerlich,N. Gogitidze,Maxime Gouzevitch,Christoph Grab,A. Grebenyuk,T. Greenshaw,G. Grindhammer,D. Haidt,R. C. W. Henderson,J. Hladky,D. H. H. Hoffmann,Roland Horisberger,Tomas Hreus,F. Huber,M. Jacquet,M. Jansová,Xavier Janssen,A. W. Jung,Hannes Jung,M. Kapichine,J. Katzy,C. Kiesling,M. H. Klein,Claus Kleinwort,R. Kogler,P. Kostka,Jan Kretzschmar,Dirk Krücker,K. Krüger,M. P. J. Landon,Wolfgang Lange,Paul Laycock,A. Lebedev,S. Levonian,K. Lipka,B. List,Jenny List,B. Lobodzinski,E. Malinovski,H.-U. Martyn,S. J. Maxfield,Andrew Mehta,A. B. Meyer,H.-J. Meyer,J.P. Meyer,S. Mikocki,A. N. Morozov,K. Müller,Th. Naumann,P. R. Newman,C. Niebuhr,G. Nowak,J.E. Olsson,D. Ozerov,C. Pascaud,G. D. Patel,Emmanuel Perez,A. Petrukhin,I. Picuric,Hayk Pirumov,Daniel Pitzl,R. Placakyte,Richard Polifka,Voica Radescu,Nataša Raičević,T. Ravdandorj,P. Reimer,Eram Rizvi,Peter Robmann,R. Roosen,A. Rostovtsev,M. Rotaru,D. Šálek,D. P. C. Sankey,M. Sauter,Emmanuel Sauvan,S. Schmitt,L. Schoeffel,A. Schöning,F. Sefkow,S. Shushkevich,Y. Soloviev,P. Sopicki,David South,V. Spaskov,A. Specka,M. Steder,B. Stella,Ulrich Straumann,Tomáš Sýkora,P. D. Thompson,D. Traynor,P. Truöl,I. Tsakov,B. Tseepeldorj,A. Valkárová,C. Vallée,P. Van Mechelen,Y. Vazdik,D. Wegener,E. Wünsch,J. Zacek,Z. Zhang,R. Žlebčík,H. Zohrabyan,F. Zomer

Measurement of \({\varvec{D^{*}}}\) production in diffractive deep inelastic scattering at HERA

2017

Measurements of \(D^{*}(2010)\) meson production in diffractive deep inelastic scattering \((5HERA data recorded at a centre-of-mass energy \(\sqrt{s} = 319\,\mathrm{GeV}\) with an integrated luminosity of 287 pb\(^{-1}\). The reaction \(ep \rightarrow eXY\) is studied, where the system X, containing at least one \(D^{*}(2010)\) meson, is separated from a leading low-mass proton dissociative system Y by a large rapidity gap. The kinematics of \(D^{*}\) candidates are reconstructed in the \(D^{*}\rightarrow K \pi \pi \) decay channel. The measured cross sections compare favourably with next-to-leading order QCD predictions, where charm quarks are produced via boson-gluon fusion. The charm quarks are then independently fragmented to the \(D^{*}\) mesons. The calculations rely on the collinear factorisation theorem and are based on diffractive parton densities previously obtained by H1 from fits to inclusive diffractive cross sections. The data are further used to determine the diffractive to inclusive \(D^{*}\) production ratio in deep inelastic scattering.

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