Measurement of charm and beauty jets in deep inelastic scattering at HERA

F.D. Aaron; C. Alexa; V. Andreev; S. Backovic; A. Baghdasaryan; E. Barrelet; W. Bartel; K. Begzsuren; A. Belousov; J.C. Bizot; V. Boudry; I. Bozovic-Jelisavcic; J. Bracinik; G. Brandt; M. Brinkmann; V. Brisson; D. Britzger; D. Bruncko; A. Bunyatyan; G. Buschhorn; L. Bystritskaya; A.J. Campbell; K.B. Cantun Avila; F. Ceccopieri; K. Cerny; V. Cerny; V. Chekelian; A. Cholewa; J.G. Contreras; J.A. Coughlan; J. Cvach; J.B. Dainton; K. Daum; M. Deák; B. Delcourt; J. Delvax; E.A. Wolf; C. Diaconu; M. Dobre; V. Dodonov; A. Dossanov; A. Dubak; G. Eckerlin; V. Efremenko; S. Egli; A. Eliseev; E. Elsen; L. Favart; A. Fedotov; R. Felst; J. Feltesse; J. Ferencei; D.-J. Fischer; M. Fleischer; A. Fomenko; E. Gabathuler; J. Gayler; S. Ghazaryan; A. Glazov; L. Goerlich; N. Gogitidze; M. Gouzevitch; C. Grab; A. Grebenyuk; T. Greenshaw; B.R. Grell; G. Grindhammer; S. Habib; D. Haidt; C. Helebrant; R.C.W. Henderson; E. Hennekemper; H. Henschel; M. Herbst; G. Herrera; M. Hildebrandt; K.H. Hiller; D. Hoffmann; R. Horisberger; T. Hreus; F. Huber; M. Jacquet; X. Janssen; L. Jönsson; A.W. Jung; H. Jung; M. Kapichine; J. Katzy; I.R. Kenyon; C. Kiesling; M. Klein; C. Kleinwort; T. Kluge; A. Knutsson; R. Kogler; P. Kostka; M. Kraemer; J. Kretzschmar; A. Kropivnitskaya; K. Krüger; K. Kutak; M.P.J. Landon; W. Lange; G. Laštovička-Medin; P. Laycock; A. Lebedev; V. Lendermann; S. Levonian; K. Lipka; B. List; J. List; N. Loktionova; R. Lopez-Fernandez; V. Lubimov; A. Makankine; E. Malinovski; P. Marage; H.-U. Martyn; S.J. Maxfield; A. Mehta; A.B. Meyer; H. Meyer; J. Meyer; S. Mikocki; I. Milcewicz-Mika; F. Moreau; A. Morozov; J.V. Morris; M.U. Mozer; M. Mudrinic; K. Müller; Th. Naumann; P.R. Newman; C. Niebuhr; A. Nikiforov; D. Nikitin; G. Nowak; K. Nowak; J.E. Olsson; S. Osman; D. Ozerov; P. Pahl; V. Palichik; I. Panagoulias; M. Pandurovic; Th. Papadopoulou; C. Pascaud; G.D. Patel; E. Perez; A. Petrukhin; I. Picuric; S. Piec; H. Pirumov; D. Pitzl; R. Plačakytė; B. Pokorny; R. Polifka; B. Povh; V. Radescu; A.J. Rahmat; N. Raicevic; T. Ravdandorj; P. Reimer; E. Rizvi; P. Robmann; R. Roosen; A. Rostovtsev; M. Rotaru; J.E. Ruiz Tabasco; S. Rusakov; D. Šálek; D.P.C. Sankey; M. Sauter; E. Sauvan; S. Schmitt; L. Schoeffel; A. Schöning; H.-C. Schultz-Coulon; F. Sefkow; L.N. Shtarkov; S. Shushkevich; T. Sloan; I. Smiljanic; Y. Soloviev; P. Sopicki; D. South; V. Spaskov; A. Specka; Z. Staykova; M. Steder; B. Stella; G. Stoicea; U. Straumann; D. Sunar; T. Sykora; G. Thompson; P.D. Thompson; T. Toll; T.H. Tran; D. Traynor; P. Truöl; I. Tsakov; B. Tseepeldorj; J. Turnau; K. Urban; A. Valkárová; C. Vallée; P. Mechelen; A. Vargas Trevino; Y. Vazdik; M. Driesch; D. Wegener; E. Wünsch; J. Žáček; J. Zálešák; Z. Zhang; A. Zhokin; H. Zohrabyan; F. Zomer

doi:10.1140/epjc/s10052-010-1509-x

2024 Impact factor 4.8

Particles and Fields

Eur. Phys. J. C 71, 1509 (2011)
https://doi.org/10.1140/epjc/s10052-010-1509-x

Measurement of charm and beauty jets in deep inelastic scattering at HERA

The H1 Collaboration
F.D. Aaron⁵, C. Alexa⁵, V. Andreev²⁵, S. Backovic³⁰, A. Baghdasaryan³⁸, E. Barrelet²⁹, W. Bartel¹¹, K. Begzsuren³⁵, A. Belousov²⁵, J.C. Bizot²⁷, V. Boudry²⁸, I. Bozovic-Jelisavcic², J. Bracinik³, G. Brandt¹¹, M. Brinkmann¹¹, V. Brisson²⁷, D. Britzger¹¹, D. Bruncko¹⁶, A. Bunyatyan¹³^,38, G. Buschhorn²⁶, L. Bystritskaya²⁴, A.J. Campbell¹¹, K.B. Cantun Avila²², F. Ceccopieri⁴, K. Cerny³², V. Cerny¹⁶, V. Chekelian²⁶, A. Cholewa¹¹, J.G. Contreras²², J.A. Coughlan⁶, J. Cvach³¹, J.B. Dainton¹⁸, K. Daum³⁷, M. Deák¹¹, B. Delcourt²⁷, J. Delvax⁴, E.A. Wolf⁴, C. Diaconu²¹, M. Dobre¹², V. Dodonov¹³, A. Dossanov²⁶, A. Dubak³⁰, G. Eckerlin¹¹, V. Efremenko²⁴, S. Egli³⁶, A. Eliseev²⁵, E. Elsen¹¹, L. Favart⁴, A. Fedotov²⁴, R. Felst¹¹, J. Feltesse¹⁰, J. Ferencei¹⁶, D.-J. Fischer¹¹, M. Fleischer¹¹, A. Fomenko²⁵, E. Gabathuler¹⁸, J. Gayler¹¹, S. Ghazaryan¹¹, A. Glazov¹¹, L. Goerlich⁷, N. Gogitidze²⁵, M. Gouzevitch¹¹, C. Grab⁴⁰, A. Grebenyuk¹¹, T. Greenshaw¹⁸, B.R. Grell¹¹, G. Grindhammer²⁶, S. Habib¹¹, D. Haidt¹¹, C. Helebrant¹¹, R.C.W. Henderson¹⁷, E. Hennekemper¹⁵, H. Henschel³⁹, M. Herbst¹⁵, G. Herrera²³, M. Hildebrandt³⁶, K.H. Hiller³⁹, D. Hoffmann²¹, R. Horisberger³⁶, T. Hreus⁴, F. Huber¹⁴, M. Jacquet²⁷, X. Janssen⁴, L. Jönsson²⁰, A.W. Jung¹⁵, H. Jung¹¹^,4, M. Kapichine⁹, J. Katzy¹¹, I.R. Kenyon³, C. Kiesling²⁶, M. Klein¹⁸, C. Kleinwort¹¹, T. Kluge¹⁸, A. Knutsson¹¹, R. Kogler²⁶, P. Kostka³⁹, M. Kraemer¹¹, J. Kretzschmar¹⁸, A. Kropivnitskaya²⁴, K. Krüger¹⁵, K. Kutak¹¹, M.P.J. Landon¹⁹, W. Lange³⁹, G. Laštovička-Medin³⁰, P. Laycock¹⁸, A. Lebedev²⁵, V. Lendermann¹⁵, S. Levonian¹¹, K. Lipka¹¹, B. List¹², J. List¹¹, N. Loktionova²⁵, R. Lopez-Fernandez²³, V. Lubimov²⁴, A. Makankine⁹, E. Malinovski²⁵, P. Marage⁴, H.-U. Martyn¹, S.J. Maxfield¹⁸, A. Mehta¹⁸, A.B. Meyer¹¹, H. Meyer³⁷, J. Meyer¹¹, S. Mikocki⁷, I. Milcewicz-Mika⁷, F. Moreau²⁸, A. Morozov⁹, J.V. Morris⁶, M.U. Mozer⁴, M. Mudrinic², K. Müller⁴¹, Th. Naumann³⁹, P.R. Newman³, C. Niebuhr¹¹, A. Nikiforov¹¹, D. Nikitin⁹, G. Nowak⁷, K. Nowak¹¹, J.E. Olsson¹¹, S. Osman²⁰, D. Ozerov²⁴, P. Pahl¹¹, V. Palichik⁹, I. Panagoulias¹¹, M. Pandurovic², Th. Papadopoulou¹¹, C. Pascaud²⁷, G.D. Patel¹⁸, E. Perez¹⁰, A. Petrukhin¹¹, I. Picuric³⁰, S. Piec¹¹, H. Pirumov¹⁴, D. Pitzl¹¹, R. Plačakytė¹¹, B. Pokorny³², R. Polifka³², B. Povh¹³, V. Radescu¹⁴, A.J. Rahmat¹⁸, N. Raicevic³⁰, T. Ravdandorj³⁵, P. Reimer³¹, E. Rizvi¹⁹, P. Robmann⁴¹, R. Roosen⁴, A. Rostovtsev²⁴, M. Rotaru⁵, J.E. Ruiz Tabasco²², S. Rusakov²⁵, D. Šálek³², D.P.C. Sankey⁶, M. Sauter¹⁴, E. Sauvan²¹, S. Schmitt¹¹, L. Schoeffel¹⁰, A. Schöning¹⁴, H.-C. Schultz-Coulon¹⁵, F. Sefkow¹¹, L.N. Shtarkov²⁵, S. Shushkevich²⁶, T. Sloan¹⁷, I. Smiljanic², Y. Soloviev²⁵, P. Sopicki⁷, D. South⁸, V. Spaskov⁹, A. Specka²⁸, Z. Staykova¹¹, M. Steder¹¹, B. Stella³³, G. Stoicea⁵, U. Straumann⁴¹, D. Sunar⁴, T. Sykora⁴, G. Thompson¹⁹, P.D. Thompson³, T. Toll¹¹, T.H. Tran²⁷, D. Traynor¹⁹, P. Truöl⁴¹, I. Tsakov³⁴, B. Tseepeldorj³⁵, J. Turnau⁷, K. Urban¹⁵, A. Valkárová³², C. Vallée²¹, P. Mechelen⁴, A. Vargas Trevino¹¹, Y. Vazdik²⁵, M. Driesch¹¹, D. Wegener⁸, E. Wünsch¹¹, J. Žáček³², J. Zálešák³¹, Z. Zhang²⁷, A. Zhokin²⁴, H. Zohrabyan³⁸ and F. Zomer²⁷

¹ I. Physikalisches Institut der RWTH, Aachen, Germany
² Vinca Institute of Nuclear Sciences, Belgrade, Serbia
³ School of Physics and Astronomy, University of Birmingham, Birmingham, UK
⁴ Inter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerpen, Belgium
⁵ National Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, Romania
⁶ Rutherford Appleton Laboratory, Chilton, Didcot, UK
⁷ Institute for Nuclear Physics, Cracow, Poland
⁸ Institut für Physik, TU Dortmund, Dortmund, Germany
⁹ Joint Institute for Nuclear Research, Dubna, Russia
¹⁰ CEA, DSM/Irfu, CE-Saclay, Gif-sur-Yvette, France
¹¹ DESY, Hamburg, Germany
¹² Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany
¹³ Max-Planck-Institut für Kernphysik, Heidelberg, Germany
¹⁴ Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany
¹⁵ Kirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany
¹⁶ Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovak Republic
¹⁷ Department of Physics, University of Lancaster, Lancaster, UK
¹⁸ Department of Physics, University of Liverpool, Liverpool, UK
¹⁹ Queen Mary and Westfield College, London, UK
²⁰ Physics Department, University of Lund, Lund, Sweden
²¹ CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
²² Departamento de Fisica Aplicada, CINVESTAV, Mérida, Yucatán, Mexico
²³ Departamento de Fisica, CINVESTAV IPN, México City, Mexico
²⁴ Institute for Theoretical and Experimental Physics, Moscow, Russia
²⁵ Lebedev Physical Institute, Moscow, Russia
²⁶ Max-Planck-Institut für Physik, München, Germany
²⁷ LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
²⁸ LLR, Ecole Polytechnique, CNRS/IN2P3, Palaiseau, France
²⁹ LPNHE, Université Pierre et Marie Curie Paris 6, Université Denis Diderot Paris 7, CNRS/IN2P3, Paris, France
³⁰ Faculty of Science, University of Montenegro, Podgorica, Montenegro
³¹ Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic
³² Faculty of Mathematics and Physics, Charles University, Praha, Czech Republic
³³ Dipartimento di Fisica Università di Roma Tre and INFN Roma 3, Rome, Italy
³⁴ Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
³⁵ Institute of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
³⁶ Paul Scherrer Institut, Villigen, Switzerland
³⁷ Fachbereich C, Universität Wuppertal, Wuppertal, Germany
³⁸ Yerevan Physics Institute, Yerevan, Armenia
³⁹ DESY, Zeuthen, Germany
⁴⁰ Institut für Teilchenphysik, ETH, Zürich, Switzerland
⁴¹ Physik-Institut der Universität Zürich, Zürich, Switzerland

daum@mail.desy.de

Received: 10 August 2010
Revised: 10 November 2010
Published online: 13 January 2011

Abstract

Measurements of cross sections for events with charm and beauty jets in deep inelastic scattering at HERA are presented. Events with jets of transverse energy $E_{T}^{\mathrm{jet}}>6$ GeV and pseudorapidity −1.0<η ^jet<1.5 in the laboratory frame are selected in the kinematic region of photon virtuality Q ²>6 GeV² and inelasticity variable 0.07<y<0.625. Measurements are also made requiring a jet in the Breit frame with $E_{T}^{*{\mathrm{jet}}}>6$ GeV. The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb⁻¹. The numbers of charm and beauty jets are determined using variables reconstructed using the H1 vertex detector with which the impact parameters of the tracks to the primary vertex and the position of secondary vertices are measured. The measurements are compared with QCD predictions and with previous measurements where heavy flavours are identified using muons.