1304981 20170120133237.0 oai:cds.cern.ch:1741020 cerncds:FULLTEXT cerncds:atlas-conf http://cds.cern.ch/oai2d oai:cds.cern.ch:1741020 2014-07-06T21:54:50Z 2014-07-07T10:00:15Z marcxml CDS 1741020 DESY DA14-kp43a ATLAS:2014pla INSPIRETeX ATLAS-CONF-2014-046 The ATLAS collaboration Calibration of the performance of $b$-tagging for $c$ and light-flavour jets in the 2012 ATLAS data 2014 Preliminary results A variety of algorithms have been developed, within the ATLAS experiment at the Large Hadron Collider, to distinguish $b$-quark jets from jets containing only lighter quarks. This note describes measurements of the efficiency of the most performant of these $b$-tagging algorithms, as carried out on the data collected at $\sqrt{s}=8$ TeV in 2012, for charm and light-flavour jets. The results, which correct the efficiency in simulation to that measured in data, are presented in the form of jet transverse momentum dependent (and in the case of the light-flavour jets, pseudorapidity dependent) scale factors. Compared to previous calibration analyses, improvements have been made driven by the larger dataset collected in 2012, as well as by a refinement of the existing analyses. These results complement those obtained for $b$ jets as presented in a previous note. INSPIRE Experiment-HEP author BTAGGING CERN LHC CERN-LHC-ATLAS INSPIRE calibration INSPIRE performance INSPIRE efficiency INSPIRE ATLAS INSPIRE transverse momentum dependence INSPIRE CERN LHC Coll INSPIRE rapidity dependence INSPIRE jet: charm INSPIRE particle identification: flavor INSPIRE bottom: particle identification INSPIRE error ATLAS http://inspirehep.net/record/1304981/files/ATLAS-COM-CONF-2013-087.pdf oai:inspirehep.net:1304981 INSPIRE:HEP CDS CERN NOTE CORE HEP 0-1-0-0-1-0-0 2014-07-07 12:53:34 Invenio/1.1.2.719-da082b refextract/1.5.44 content.pdf;1 796888 ATLAS Collaboration The ATLAS Experiment at the CERN Large Hadron Collider 1 JINST,3,S08003 2008 1282511 ATLAS Collaboration Calibration of b-tagging using dileptonic top pair events in a combinatorial likelihood approach with the ATLAS experiment 2 ATLAS-CONF-2014-004 http://cdsweb.cern.ch/record/1664335 1203947 ATLAS Collaboration Performance of the ATLAS Secondary Vertex b-tagging Algorithm in 7 TeV Collision Data 3 ATLAS-CONF-2010-042 http://cdsweb.cern.ch/record/1277682 1204180 ATLAS Collaboration Commissioning of high performance b-tagging algorithms with the ATLAS detector 4 ATLAS-CONF-2011-102 http://cdsweb.cern.ch/record/1369219 807147 W. Lampl et al. Calorimeter Clustering Algorithms: Description and Performance 5 ATL-LARG-PUB-2008-002 ATL-COM-LARG-2008-003 779080 M. Cacciari, G. P. Salam, and G. Soyez The anti-kt jet clustering algorithm 6 arXiv:0802.1189 [hep-ph] JHEP,0804,063 2008 700668 M. Cacciari and G. P. Salam Dispelling the N3 myth for the kt jet-finder 7 hep-ph/0512210 Phys.Lett.,B641,057 2006 CURATOR M. Cacciari, G. P. Salam, and G. Soyez 8 http://fastjet.fr 755413 M. Cacciari and G. P. Salam Pileup subtraction using jet areas 9 arXiv:0707.1378 [hep-ph] Phys.Lett.,B659,119-126 2008 1260963 ATLAS Collaboration Pile-up subtraction and suppression for jets in ATLAS 10 ATLAS-CONF-2013-083 http://cds.cern.ch/record/1570994 1082939 ATLAS Collaboration Jet energy measurement with the ATLAS detector in proton- proton collisions at √ s = 7 TeV 11 arXiv:1112.6426 [hep-ex] Eur.Phys.J.,C73,2304 2013 764903 T. Sjöstrand, S. Mrenna, and P. Z. Skands A Brief Introduction to PYTHIA 8.1 12 arXiv:0710.3820 [hep-ph] Comput.Phys.Commun.,178,852-867 2008 593382 GEANT4 Collaboration S. Agostinelli et al. GEANT4: A simulation toolkit 13 Nucl.Instrum.Meth.,A506,250-303 2003 856179 ATLAS Collaboration The ATLAS Simulation Infrastructure 14 arXiv:1005.4568 [physics.ins-det] Eur.Phys.J.,C70,823-874 2010 712925 T. Sjöstrand, S. Mrenna, and P. Z. Skands PYTHIA 6.4 Physics and Manual 15 JHEP,0605,026 2006 855212 P. Z. Skands Tuning Monte Carlo Generators: The Perugia Tunes 16 arXiv:1005.3457 [hep-ph] Phys.Rev.,D82,074018 2010 861245 H. L. Lai et al. New parton distributions for collider physics 17 arXiv:1007.2241 [hep-ph] Phys.Rev.,D82,074024 2010 560129 D. J. Lange The EvtGen particle decay simulation package 18 Nucl.Instrum.Meth.,A462,152 2001 1204280 ATLAS Collaboration b-jet tagging calibration on c-jets containing D⋆ mesons 19 ATLAS-CONF-2012-039 http://cdsweb.cern.ch/record/1435193 1126428 J. Beringer et al. Review of Particle Physics (RPP) and 2013 partial update for the 2014 edition 20 Phys.Rev.,D86,010001 2012 1081794 E. Lohrmann, A Summary of Charm Hadron Production Fractions 21 arXiv:1112.3757 [hep-ex] 1204034 ATLAS Collaboration Jet energy resolution and reconstruction efficiencies from in-situ techniques with the ATLAS Detector Using Proton-Proton Collisions at a Center of Mass Energy √ s = 7 TeV 22 ATLAS-CONF-2010-054 http://cdsweb.cern.ch/record/1281311