Measurement of the production of charm jets tagged with D0 mesons in pp collisions at $$ \sqrt{\mathrm{s}}=7 $$ TeV

Author:

,Acharya S.,Adamová D.,Adhya S. P.,Adler A.,Adolfsson J.,Aggarwal M. M.,Aglieri Rinella G.,Agnello M.,Agrawal N.,Ahammed Z.,Ahmad S.,Ahn S. U.,Aiola S.,Akindinov A.,Al-Turany M.,Alam S. N.,Albuquerque D. S. D.,Aleksandrov D.,Alessandro B.,Alfanda H. M.,Alfaro Molina R.,Ali B.,Ali Y.,Alici A.,Alkin A.,Alme J.,Alt T.,Altenkamper L.,Altsybeev I.,Anaam M. N.,Andrei C.,Andreou D.,Andrews H. A.,Andronic A.,Angeletti M.,Anguelov V.,Anson C.,Antičić T.,Antinori F.,Antonioli P.,Anwar R.,Apadula N.,Aphecetche L.,Appelshäuser H.,Arcelli S.,Arnaldi R.,Arratia M.,Arsene I. C.,Arslandok M.,Augustinus A.,Averbeck R.,Aziz S.,Azmi M. D.,Badalà A.,Baek Y. W.,Bagnasco S.,Bai X.,Bailhache R.,Bala R.,Baldisseri A.,Ball M.,Baral R. C.,Barbera R.,Barioglio L.,Barnaföldi G. G.,Barnby L. S.,Barret V.,Bartalini P.,Barth K.,Bartsch E.,Baruffaldi F.,Bastid N.,Basu S.,Batigne G.,Batyunya B.,Batzing P. C.,Bauri D.,Bazo Alba J. L.,Bearden I. G.,Bedda C.,Behera N. K.,Belikov I.,Bellini F.,Bellwied R.,Belyaev V.,Bencedi G.,Beole S.,Bercuci A.,Berdnikov Y.,Berenyi D.,Bertens R. A.,Berzano D.,Besoiu M. G.,Betev L.,Bhasin A.,Bhat I. R.,Bhatt H.,Bhattacharjee B.,Bianchi A.,Bianchi L.,Bianchi N.,Bielčík J.,Bielčíková J.,Bilandzic A.,Biro G.,Biswas R.,Biswas S.,Blair J. T.,Blau D.,Blume C.,Boca G.,Bock F.,Bogdanov A.,Boldizsár L.,Bolozdynya A.,Bombara M.,Bonomi G.,Borel H.,Borissov A.,Borri M.,Bossi H.,Botta E.,Bourjau C.,Bratrud L.,Braun-Munzinger P.,Bregant M.,Broker T. A.,Broz M.,Brucken E. J.,Bruna E.,Bruno G. E.,Buckland M. D.,Budnikov D.,Buesching H.,Bufalino S.,Bugnon O.,Buhler P.,Buncic P.,Buthelezi Z.,Butt J. B.,Buxton J. T.,Caffarri D.,Caliva A.,Calvo Villar E.,Camacho R. S.,Camerini P.,Capon A. A.,Carnesecchi F.,Castillo Castellanos J.,Castro A. J.,Casula E. A. R.,Catalano F.,Ceballos Sanchez C.,Chakraborty P.,Chandra S.,Chang B.,Chang W.,Chapeland S.,Chartier M.,Chattopadhyay S.,Chattopadhyay S.,Chauvin A.,Cheshkov C.,Cheynis B.,Chibante Barroso V.,Chinellato D. D.,Cho S.,Chochula P.,Chowdhury T.,Christakoglou P.,Christensen C. H.,Christiansen P.,Chujo T.,Cicalo C.,Cifarelli L.,Cindolo F.,Cleymans J.,Colamaria F.,Colella D.,Collu A.,Colocci M.,Concas M.,Conesa Balbastre G.,Conesa del Valle Z.,Contin G.,Contreras J. G.,Cormier T. M.,Corrales Morales Y.,Cortese P.,Cosentino M. R.,Costa F.,Costanza S.,Crkovská J.,Crochet P.,Cuautle E.,Cunqueiro L.,Dabrowski D.,Dahms T.,Dainese A.,Damas F. P. A.,Dani S.,Danisch M. C.,Danu A.,Das D.,Das I.,Das S.,Dash A.,Dash S.,Dashi A.,De S.,De Caro A.,de Cataldo G.,de Conti C.,de Cuveland J.,De Falco A.,De Gruttola D.,De Marco N.,De Pasquale S.,De Souza R. D.,Deb S.,Degenhardt H. F.,Deja K. R.,Deloff A.,Delsanto S.,Dhankher P.,Di Bari D.,Di Mauro A.,Diaz R. A.,Dietel T.,Dillenseger P.,Ding Y.,Divià R.,Djuvsland Ø.,Dmitrieva U.,Dobrin A.,Dönigus B.,Dordic O.,Dubey A. K.,Dubla A.,Dudi S.,Dukhishyam M.,Dupieux P.,Ehlers R. J.,Elia D.,Engel H.,Epple E.,Erazmus B.,Erhardt F.,Erokhin A.,Ersdal M. R.,Espagnon B.,Eulisse G.,Eum J.,Evans D.,Evdokimov S.,Fabbietti L.,Faggin M.,Faivre J.,Fantoni A.,Fasel M.,Fecchio P.,Feldkamp L.,Feliciello A.,Feofilov G.,Fernández Téllez A.,Ferrero A.,Ferretti A.,Festanti A.,Feuillard V. J. G.,Figiel J.,Filchagin S.,Finogeev D.,Fionda F. M.,Fiorenza G.,Flor F.,Foertsch S.,Foka P.,Fokin S.,Fragiacomo E.,Frankenfeld U.,Fronze G. G.,Fuchs U.,Furget C.,Furs A.,Fusco Girard M.,Gaardhøje J. J.,Gagliardi M.,Gago A. M.,Gal A.,Galvan C. D.,Ganoti P.,Garabatos C.,Garcia-Solis E.,Garg K.,Gargiulo C.,Garibli A.,Garner K.,Gasik P.,Gauger E. F.,Gay Ducati M. B.,Germain M.,Ghosh J.,Ghosh P.,Ghosh S. K.,Gianotti P.,Giubellino P.,Giubilato P.,Glässel P.,Goméz Coral D. 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Abstract

Abstract The production of charm jets in proton-proton collisions at a center-of-mass energy of $$ \sqrt{s}=7 $$ s = 7 TeV was measured with the ALICE detector at the CERN Large Hadron Collider. The measurement is based on a data sample corresponding to a total integrated luminosity of 6.23 nb−1, collected using a minimum-bias trigger. Charm jets are identified by the presence of a D0 meson among their constituents. The D0 mesons are reconstructed from their hadronic decay D0 →Kπ+. The D0-meson tagged jets are reconstructed using tracks of charged particles (track-based jets) with the anti-k T algorithm in the jet transverse momentum range $$ 5<{p}_{{\mathrm{T}}_{,\mathrm{jet}}}^{\mathrm{ch}} $$ 5 < p T , jet ch < 30 GeV/c and pseudorapidity |η jet| < 0.5. The fraction of charged jets containing a D0-meson increases with $$ {p}_{{\mathrm{T}}_{,\mathrm{jet}}}^{\mathrm{ch}} $$ p T , jet ch from 0.042 ± 0.004 (stat) ± 0.006 (syst) to 0.080 ± 0.009 (stat) ± 0.008 (syst). The distribution of D0-meson tagged jets as a function of the jet momentum fraction carried by the D0 meson in the direction of the jet axis $$ \left({z}_{\parallel}^{\mathrm{ch}}\right) $$ z ch is reported for two ranges of jet transverse momenta, $$ 5<{p}_{{\mathrm{T}}_{,\mathrm{jet}}}^{\mathrm{ch}} $$ 5 < p T , jet ch < 15 GeV/c and $$ 15<{p}_{{\mathrm{T}}_{,\mathrm{jet}}}^{\mathrm{ch}} $$ 15 < p T , jet ch < 30 GeV/c in the intervals $$ 0.2<{z}_{\Big\Vert}^{\mathrm{ch}}<1.0 $$ 0.2 < z ch < 1.0 and $$ 0.4<{z}_{\Big\Vert}^{\mathrm{ch}}<1.0 $$ 0.4 < z ch < 1.0 , respectively. The data are compared with results from Monte Carlo event generators (PYTHIA 6, PYTHIA 8 and Herwig 7) and with a Next-to-Leading-Order perturbative Quantum Chromodynamics calculation, obtained with the POWHEG method and interfaced with PYTHIA 6 for the generation of the parton shower, fragmentation, hadronisation and underlying event.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

Reference68 articles.

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