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Title

The differential production cross section of the ϕ (1020) meson in √s = 7 TeV pp collisions measured with the ATLAS detector

CollaborationWith : Abdelalim Aly, Ahmed Aly / Alexandre, Gauthier / Backes, Moritz / Barone, Gaetano / Bell, Paul / Bell, William / Benhar Noccioli, Eleonora / Blondel, Alain / Bucci, Francesca / Clark, Allan Geoffrey / Dao, Valerio / Doglioni, Caterina / Ferrere, Didier / Gadomski, Szymon / Gonzalez Sevilla, Sergio / Goulette, Marc / Iacobucci, Giuseppe / La Rosa, Alessandro / Lister, Alison / Martin Dit Latour, Bertrand / Mermod, Philippe / Mora Herrera, Maria Clemencia Rosario / Nektarijevic, Snezana / Nikolics, Katalin / Pásztor, G. / Picazio, Attilio / Pohl, Martin / Rosbach, Kilian / Rosselet, Laurent / Wu, Xin
Published in European Physical Journal. C. 2014, vol. 74, no. 7, p. 2895
Collection SCOAP3
Abstract A measurement is presented of the <math><mrow><mi mathvariant="italic ϕ</mi><mo>×</mo><mi mathvariant="script BR</mi><mo stretchy="false (</mo><mi mathvariant="italic ϕ</mi><mo stretchy="false →</mo><msup><mi>K</mi><mo>+</mo></msup><msup><mi>K</mi><mo>-</mo></msup><mo stretchy="false )</mo></mrow></math> production cross section at <math><msqrt><mi>s</mi></msqrt></math> = 7 TeV using <math><mrow><mi>p</mi><mi>p</mi></mrow></math> collision data corresponding to an integrated luminosity of 383  <math><mrow><mi mathvariant="normal μ</mi><msup><mi mathvariant="normal b</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></mrow></math> , collected with the ATLAS experiment at the LHC. Selection of <math><mi mathvariant="italic ϕ</mi></math> (1020) mesons is based on the identification of charged kaons by their energy loss in the pixel detector. The differential cross section is measured as a function of the transverse momentum, <math><msub><mi>p</mi><mrow><mi mathvariant="normal T</mi><mo>,</mo><mi mathvariant="italic ϕ</mi></mrow></msub></math> , and rapidity, <math><msub><mi>y</mi><mi mathvariant="italic ϕ</mi></msub></math> , of the <math><mi mathvariant="italic ϕ</mi></math> (1020) meson in the fiducial region 500 <math><mrow><mo><</mo><msub><mi>p</mi><mrow><mi mathvariant="normal T</mi><mo>,</mo><mi mathvariant="italic ϕ</mi></mrow></msub><mo><</mo></mrow></math> 1200 MeV, <math><mrow><mrow><mo stretchy="false |</mo></mrow><msub><mi>y</mi><mi mathvariant="italic ϕ</mi></msub><mrow><mo stretchy="false |</mo><mo><</mo></mrow></mrow></math> 0.8, kaon <math><mrow><msub><mi>p</mi><mrow><mi mathvariant="normal T</mi><mo>,</mo><mi>K</mi></mrow></msub><mo>></mo></mrow></math> 230 MeV and kaon momentum <math><mrow><msub><mi>p</mi><mi>K</mi></msub><mo><</mo></mrow></math> 800 MeV. The integrated <math><mrow><mi mathvariant="italic ϕ</mi><mo stretchy="false (</mo><mn>1020</mn><mo stretchy="false )</mo></mrow></math> -meson production cross section in this fiducial range is measured to be <math><mrow><msub><mi mathvariant="italic σ</mi><mi mathvariant="italic ϕ</mi></msub><mo>×</mo><mi mathvariant="script BR</mi><mrow><mo stretchy="false (</mo><mi mathvariant="italic ϕ</mi><mo stretchy="false →</mo><msup><mi>K</mi><mo>+</mo></msup><msup><mi>K</mi><mo>-</mo></msup><mo stretchy="false )</mo></mrow></mrow></math> = 570 <math><mo>±</mo></math> 8 (stat) <math><mo>±</mo></math> 66 (syst) <math><mo>±</mo></math> 20 (lumi) <math><mrow><mi mathvariant="normal μ</mi><mi mathvariant="normal b</mi></mrow></math> .
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ATLAS COLLABORATION. The differential production cross section of the ϕ (1020) meson in √s = 7 TeV pp collisions measured with the ATLAS detector. In: European Physical Journal. C, 2014, vol. 74, n° 7, p. 2895. https://archive-ouverte.unige.ch/unige:55794

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Deposited on : 2015-04-27

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