Navegar

Colección

Datos Estadísticas

Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at s √S13 TeV at the large hadron collider, have been considered. An integrated luminosity of 3.2 fb −1 , corresponding to the full 2015 dataset was used. First (second) generation leptoquarks were sought in events with two electrons (muons) and two or more jets. The observed event yield in each channel is consistent with Standard Model background expectations. The observed (expected) lower limits on the leptoquark mass at 95% confidence level are 1100 and 1050 GeV (1160 and 1040 GeV) for first and second generation leptoquarks, respectively, assuming a branching ratio into a charged lepton and a quark of 100%. Upper limits on the aforementioned branching ratio are also given as a function of leptoquark mass. Compared with the results of earlier ATLAS searches, the sensitivity is increased for leptoquark masses above 860 GeV, and the observed exclusion limits confirm and extend the published results. © 2016 CERN for the benefit of the ATLAS Collaboration.

Registro:

Documento: Artículo
Título:Search for scalar leptoquarks in pp collisions at √S = 13TeV with the ATLAS experiment
Autor:Aaboud, M. et al.
Este artículo contiene 1645 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 1645 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:ATLAS; Leptoquark; LHC; Elementary particles; Fighter aircraft; Tellurium compounds; ATLAS experiment; Branching ratio; Charged leptons; Confidence levels; Integrated luminosity; Large Hadron Collider; Second generation; Standard model; High energy physics
Año:2016
Volumen:18
Número:9
Página de inicio:1
Página de fin:25
DOI: http://dx.doi.org/10.1088/1367-2630/18/9/093016
Título revista:New Journal of Physics
Título revista abreviado:New J. Phys.
ISSN:13672630
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13672630_v18_n9_p1_Aaboud

Referencias:

  • Dimopoulos Skand Susskind, L., (1979) Nucl. Phys. B, 155, pp. 237-252
  • Dimopoulos, S., Technicoloured signatures (1980) Nucl. Phys. B, 168, pp. 69-92
  • Eichten, E., Lane, K.D., Dynamical breaking of weak interaction symmetries (1980) Phys. Lett. B, 90, pp. 125-130
  • Angelopoulos, V.D., Search for new quarks suggested by the superstring (1986) Nucl. Phys. B, 292, pp. 59-92
  • Buchmüller, W., Wyler, D., Constraints on SU(5)-type leptoquarks (1986) Phys. Lett. B, 177, pp. 377-382
  • Pati, J.C., Salam, A., Lepton number as the fourth color (1974) Phys. Rev.D, 10, pp. 275-289
  • Pati, J.C., Salam, A., Lepton number as the fourth color (1975) Phys. Rev.D, 11, p. 703
  • Georgihand Glashow, S., Unity of all elementary particle forces (1974) Phys. Rev. Lett, 32, pp. 438-441
  • Schrempp, B., Schrempp, F., Light leptoquarks (1985) Phys. Lett. B, 153, p. 101
  • Krämer, M., Pair production of scalar leptoquarks at the CERN LHC (2005) Phys. Rev, D71
  • Buchmüller, W., Rückl, R., Wyler, D., Leptoquarks in lepton-quark collisions (1987) Phys. Lett. B, 191, pp. 442-448
  • Buchmüller, W., Rückl, R., Wyler, D., Leptoquarks in lepton—quark collisions (1999) Phys. Lett. B, 448, p. 320
  • Olive, K.A., Review of particle physics (2014) Chin. Phys, C38
  • Search for pair production of first-generation scalar leptoquarks in pp collisions at s = 7 TeV (2011) Phys. Rev. Lett, 106
  • Search for pair production of first-generation scalar leptoquarks in pp collisions at s = 7 TeV (2011) Phys. Rev. Lett, 106
  • Search for pair production of first or second generation leptoquarks in protonproton collisions at s = 7 TeVusing the ATLAS detector at the LHC (2011) Phys. Rev, D83
  • Search for first generation scalar leptoquarks in pp collisions at s = 7 TeVwith the ATLAS detector (2012) Phys. Lett. B, 709, p. 158
  • Search for second generation scalar leptoquarks in pp collisions at s (2012) Eur. Phys. J, p. 72
  • Search for pair production of first-and second-generation scalar leptoquarks in pp collisions at s = 7 TeV (2012) Phys. Rev, D86
  • Search for pair production of third-generation leptoquarks and top squarks in pp collisions at s = 7 TeV (2013) Phys. Rev. Lett, 110
  • Search for third generation scalar leptoquarks in pp collisions at s = 7 TeVwith the ATLAS detector (2013) J. High Energy Phys, , JHEP06(2013)033
  • Searches for scalar leptoquarks in pp collisions at s = 8 TeVwith the ATLAS detector (2016) Eur. Phys. J, C76, p. 5
  • Search for pair production of first and second generation leptoquarks in proton-proton collisions at s = 8 TeV (2016) Phys. Rev, D93
  • Search for third-generation leptoquarks and scalar bottomquarks in pp collisions at s = 7 TeVJ (2012) High Energy Phys, , JHEP12(2012)055
  • Search for pair production of third-generation scalar leptoquarks and top squarks in proton-proton collisions at s = 8 TeV (2014) Phys. Lett. B, 739, p. 229
  • Search for third-generation scalar leptoquarks in the tt channel in proton-proton collisions at s = 8 TeV J (2015) High Energy Phys, , JHEP07(2015)042
  • (2008) The ATLAS Experiment at Thecern Large Hadron Collider, 3, p. 8003
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., A brief introduction to PYTHIA 8.1 (2008) Comput. Phys. Commun, 178, pp. 852-867
  • (2014) ATLAS Pythia 8 Tunes to 7 Tev Data, , http://cdsweb.cern.ch/record/1966419, ATL-PHYS-PUB-2014-021
  • Ball, R.D., Parton distributions withLHC data (2013) Nucl. Phys. B, 867, pp. 244-289
  • Gleisberg, T., Event generation with SHERPA 1.1 J (2009) High Energy Phys, , JHEP02(2009)007
  • Gleisberg, T., Höche, S., Comix, a new matrix element generator J (2008) High Energy Phys, , JHEP12(2008)039
  • Cascioli, F., Maierhofer, P., Pozzorini, S., Scattering amplitudes with open loops (2012) Phys. Rev. Lett, 108
  • Schumann, S., Krauss, F., A Parton shower algorithm based on Catani-Seymour dipole factorisation (2008) J. High Energy Phys
  • Höche, S., QCDmatrix elements+parton showers: TheNLOcase (2013) J. High Energy Phys, , JHEP04(2013)027
  • Lai, H.-L., New parton distributions for collider physics (2010) Phys. Rev, D82
  • Nason, P., A New method for combining NLOQCDwith shower Monte Carlo algorithms (2004) J. High Energy Phys, , JHEP11(2004)040
  • Frixione, S., Nason, P., Oleari, C., MatchingNLOQCDcomputations with parton shower simulations: ThePOWHEGmethod (2007) J. High Energy Phys, 11. , JHEP
  • Alioli, S., A general framework for implementingNLOcalculations in shower Monte Carlo programs: ThePOWHEGBOX (2010) J. High Energy Phys, , JHEP06(2010)043
  • Re, E., Single-top Wt-channel production matched with parton showers using thePOWHEGmethod (2011) Eur. Phys. J, C71, p. 1547
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., PYTHIA 6.4 physics and manual (2006) J. High Energy Phys, , JHEP05(2006)026
  • Skands, P.Z., Tuning monte carlo generators: The perugia tunes (2010) Phys. Rev, D82
  • Pumplin, J., New generation of parton distributions with uncertainties from globalQCDanalysis (2002) J. High Energy Phys, , JHEP07 (2002)012
  • Lange, D.J., The EvtGen particle decay simulation package (2001) Nucl. Instrum. Meth. A, 462, p. 152
  • (2012) Summary of ATLAS Pythia 8 Tunes, , http://cds.cern.ch/record/1474107, ATL-PHYS-PUB-2012-003
  • Martin, A., Parton distributions for theLHC (2009) Eur. Phys. J, C63, p. 189
  • The ATLAS simulation infrastructure (2010) Eur. Phys. J, C70, p. 823
  • Agostinelli, S., GEANT4: A simulation toolkit (2003) Nucl. Instrum. Meth. A, 506, pp. 250-303
  • The simulation principle and performance of the ATLAS fast calorimeter simulation (2010) Fastcalosim, , http://cds.cern.ch/record/1300517, ATLPHYS-PUB-2010-013
  • Frixione, S., Single-top hadroproduction in association with a Wboson (2008) J. High Energy Phys, , JHEP07(2008)029
  • Czakon, M., Mitov, A., Top++: A program for the calculation of the top-pair cross-section at hadron colliders (2014) Comput. Phys. Commun, 185, p. 2930
  • (2014) Electron Efficiency Measurements with the ATLAS Detector Using the 2012LHC Proton-Proton Collision Data, , http://cdsweb.cern.ch/record/1706245, ATLAS-CONF-2014-032
  • (2015) Electron Efficiency Measurements in 2015 Data, , http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PLOTS/EGAM-2015-006/index.html
  • Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012LHC proton-proton collision data (2014) Eur. Phys. J, C74, p. 3130
  • Muon reconstruction performance of the ATLAS detector in proton-proton collision data at s =13 TeV (2016) Eur. Phys. J, C76, p. 292
  • Cacciari, M., Salam, G.P., Soyez, G., The anti-kt jet clustering algorithm (2008) J.High Energy Phys, , JHEP04(2008)063
  • (2016) Topological Cell Clustering in the ATLAS Calorimeters and Its Performance in Lhcrun, , 1 arXiv:1603. 02934
  • (2015) Selection of Jets Produced in 13 Tev Proton-Proton Collisions with the ATLAS Detector, , http://cdsweb.cern.ch/record/2037702, ATLAS-CONF-2015-029
  • Jet energymeasurement and its systematic uncertainty in proton-proton collisions at s = 7 TeVwith the ATLAS detector (2015) Eur. Phys. J, 75, p. 17
  • (2016) 2015 Start-Up Trigger Menu and Initial Performance Assessment of the ATLAS Trigger Using Run-2 Data, , https://cds.cern.ch/record/2136007/, ATL-DAQ-PUB-2016-001
  • (2015) Muon Reconstruction Performance in Early S=13 Tev Data, , http://cdsweb.cern.ch/record/2047831, ATL-PHYS-PUB-2015-037
  • Cowan, G., Asymptotic formulae for likelihood-based tests of new physics (2011) Eur. Phys. J. C, 71, p. 1554
  • Cowan, G., Asymptotic formulae for likelihood-based tests of new physics (2013) Eur. Phys. J, C73, p. 2501
  • Baak, M., HistFitter software framework for statistical data analysis (2015) Eur. Phys. J, C75, p. 153
  • Search for high-mass dilepton resonances in pp collisions at s = 8 TeVwith the ATLAS detector (2014) Phys. Rev, D90
  • Improved luminosity determination in pp collisions at s (2013) Eur. Phys. J, p. 73
  • Corcella, G., HERWIG6: An event generator for hadron emission reactions with interfering gluons (including supersymmetric processes) (2001) J. High Energy Phys, , JHEP01(2001)010
  • Alwall, J., The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014) J. High Energy Phys, , JHEP07(2014)079
  • (2011) Further ATLAS Tunes of Pythia 6 and Pythia, , http://cds.cern.ch/record/1400677, 8 ATL-PHYS-PUB-2011-014
  • Dulat, S., New parton distribution functions from a global analysis of quantum chromodynamics (2016) Phys. Rev, D93
  • Harland-Lang, L.A., Parton distributions in theLHC era:MMHT2014 PDFs (2015) Eur. Phys. J, C75, p. 204
  • Read, A.L., Presentation of search results: The CLs technique (2002) J. Phys. G: Nucl. Part. Phys, 28, p. 2693

Citas:

---------- APA ----------
(2016) . Search for scalar leptoquarks in pp collisions at √S = 13TeV with the ATLAS experiment. New Journal of Physics, 18(9), 1-25.
http://dx.doi.org/10.1088/1367-2630/18/9/093016
---------- CHICAGO ----------
Aaboud, M. "Search for scalar leptoquarks in pp collisions at √S = 13TeV with the ATLAS experiment" . New Journal of Physics 18, no. 9 (2016) : 1-25.
http://dx.doi.org/10.1088/1367-2630/18/9/093016
---------- MLA ----------
Aaboud, M. "Search for scalar leptoquarks in pp collisions at √S = 13TeV with the ATLAS experiment" . New Journal of Physics, vol. 18, no. 9, 2016, pp. 1-25.
http://dx.doi.org/10.1088/1367-2630/18/9/093016
---------- VANCOUVER ----------
Aaboud, M. Search for scalar leptoquarks in pp collisions at √S = 13TeV with the ATLAS experiment. New J. Phys. 2016;18(9):1-25.
http://dx.doi.org/10.1088/1367-2630/18/9/093016