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The ΛbΛb differential production cross section and the cross section ratio σ(Λ¯b)/σ(Λb) are measured as functions of transverse momentum pTΛb and rapidity |yΛb||yΛb| in pppp collisions at s=7 TeV using data collected by the CMS experiment at the LHC. The measurements are based on ΛbΛb decays reconstructed in the exclusive final state J/ψΛJ/ψΛ, with the subsequent decays J/ψ→μ+μ−J/ψ→μ+μ− and Λ→pπΛ→pπ, using a data sample corresponding to an integrated luminosity of 1.9 fb−11.9 fb−1. The product σ(Λb)×B(Λb→J/ψΛ)σ(Λb)×B(Λb→J/ψΛ) versus pTΛb falls faster than that of b mesons. The measured value of σ(Λb)×B(Λb→J/ψΛ)σ(Λb)×B(Λb→J/ψΛ) for pTΛb>10 GeV and |yΛb|<2.0|yΛb|<2.0 is 1.16±0.06±0.12 nb1.16±0.06±0.12 nb, and the integrated σ(Λ¯b)/σ(Λb) ratio is 1.02±0.07±0.091.02±0.07±0.09, where the uncertainties are statistical and systematic, respectively.
S. CHATRCHYAN, V. KHACHATRYAN, A.M. SIRUNYAN, A. TUMASYAN, W. ADAM, T. BERGAUER, et al. (2012). Measurement of the Lambda_b cross section and the antiLambda_b to Lambda_b
ratio with J/psi Lambda decays in pp collisions at sqrt(s) = 7 TeV. PHYSICS LETTERS. SECTION B, 714, 136-157 [10.1016/j.physletb.2012.05.063].
Measurement of the Lambda_b cross section and the antiLambda_b to Lambda_b
ratio with J/psi Lambda decays in pp collisions at sqrt(s) = 7 TeV
S. CHATRCHYAN;V. KHACHATRYAN;A. M. SIRUNYAN;A. TUMASYAN;W. ADAM;T. BERGAUER;M. DRAGICEVIC;J. ER . A. N(O;C. FABJAN;M. FRIEDL;R. FRUHWIRTH;V. M. GHETE;J. HAMMER;S. H. N(ANSEL;C. HARTL;M. HOCH;N. H. N(ORMANN;J. HRUBEC;M. JEITLER;G. KASIECZKA;W. KIESENHOFER;M. KRAMMER;D. LIKO;I. MIKULEC;M. PERNICKA;H. ROHRINGER;R. SCH N(OFBECK;J. STRAUSS;A. TAUROK;F. TEISCHINGER;W. WALTENBERGER;G. WALZEL;E. WIDL;C. E. WULZ;V. MOSSOLOV;N. SHUMEIKO;J. SUAREZ GONZALEZ;L. BENUCCI;L. CEARD;E. A. DE WOLF;X. JANSSEN;T. MAES;L. MUCIBELLO;S. OCHESANU;B. ROLAND;R. ROUGNY;M. SELVAGGI;H. VAN HAEVERMAET;P. VAN MECHELEN;N. VAN REMORTEL;V. ADLER;S. BEAUCERON;S. BLYWEERT;J. D. $B!G (BHONDT;O. DEVROEDE;A. KALOGEROPOULOS;J. MAES;M. MAES;S. TAVERNIER;W. VAN DONINCK;P. VAN MULDERS;I. VILLELLA;E. C. CHABERT;O. CHARAF;B. CLERBAUX;G. DE LENTDECKER;V. DERO;A. P. R. GAY;G. H. HAMMAD;T. HREUS;P. E. MARAGE;C. VANDER VELDE;P. VANLAER;J. WICKENS;S. COSTANTINI;M. GRUNEWALD;B. KLEIN;A. MARINOV;D. RYCKBOSCH;F. THYSSEN;M. TYTGAT;L. 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2012
Abstract
The ΛbΛb differential production cross section and the cross section ratio σ(Λ¯b)/σ(Λb) are measured as functions of transverse momentum pTΛb and rapidity |yΛb||yΛb| in pppp collisions at s=7 TeV using data collected by the CMS experiment at the LHC. The measurements are based on ΛbΛb decays reconstructed in the exclusive final state J/ψΛJ/ψΛ, with the subsequent decays J/ψ→μ+μ−J/ψ→μ+μ− and Λ→pπΛ→pπ, using a data sample corresponding to an integrated luminosity of 1.9 fb−11.9 fb−1. The product σ(Λb)×B(Λb→J/ψΛ)σ(Λb)×B(Λb→J/ψΛ) versus pTΛb falls faster than that of b mesons. The measured value of σ(Λb)×B(Λb→J/ψΛ)σ(Λb)×B(Λb→J/ψΛ) for pTΛb>10 GeV and |yΛb|<2.0|yΛb|<2.0 is 1.16±0.06±0.12 nb1.16±0.06±0.12 nb, and the integrated σ(Λ¯b)/σ(Λb) ratio is 1.02±0.07±0.091.02±0.07±0.09, where the uncertainties are statistical and systematic, respectively.
S. CHATRCHYAN, V. KHACHATRYAN, A.M. SIRUNYAN, A. TUMASYAN, W. ADAM, T. BERGAUER, et al. (2012). Measurement of the Lambda_b cross section and the antiLambda_b to Lambda_b
ratio with J/psi Lambda decays in pp collisions at sqrt(s) = 7 TeV. PHYSICS LETTERS. SECTION B, 714, 136-157 [10.1016/j.physletb.2012.05.063].
S. CHATRCHYAN; V. KHACHATRYAN; A.M. SIRUNYAN; A. TUMASYAN; W. ADAM; T. BERGAUER; M. DRAGICEVIC; J. ER .A N(O; C. FABJAN; M. FRIEDL; R. FRUHWIRTH; V.M....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/127753
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
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