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:

This paper reports the results of a search for strong production of supersymmetric particles in 20.1 fb -1 of proton-proton collisions at a centre-of-mass energy of 8 TeV using the ATLAS detector at the LHC. The search is performed separately in events with either zero or at least one high-pT lepton (electron or muon), large missing transverse momentum, high jet multiplicity and at least three jets identified as originated from the fragmentation of a b-quark. No excess is observed with respect to the Standard Model predictions. The results are interpreted in the context of several supersymmetric models involving gluinos and scalar top and bottom quarks, as well as a mSUGRA/CMSSM model. Gluino masses up to 1340 GeV are excluded, depending on the model, significantly extending the previous ATLAS limits. © CERN, for the benefit of the ATLAS Collaboration.

Registro:

Documento: Artículo
Título:Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets at √s = 8 TeV proton-proton collisions with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2882 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2882 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Hadron-Hadron Scattering
Año:2014
Volumen:2014
Número:10
DOI: http://dx.doi.org/10.1007/JHEP10(2014)024
Título revista:Journal of High Energy Physics
Título revista abreviado:J. High Energy Phys.
ISSN:11266708
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2014_n10_p_Aad

Referencias:

  • Miyazawa, H., Baryon number changing currents (1966) Prog. Theor. Phys, 36, p. 1266. , [inSSPIRE]
  • Ramond, P., Dual theory for free fermions (1971) Phys. Rev. D, 3, p. 2415. , [inSSPIRE]
  • Golfand, Y., Likhtman, E.P., Extension of the algebra of Poincare group generators and violation of p invariance (1971) JETP Lett, 13, p. 323. , [Pisma Zh. Eksp. Teor. Fiz. 13 (1971) 452][inSSPIRE]
  • Neveu, A., Schwarz, J.H., Factorizable dual model of pions (1971) Nucl. Phys. B, 31, p. 86. , [inSSPIRE]
  • Neveu, A., Schwarz, J.H., Quark model of dual pions (1971) Phys. Rev. D, 4, p. 1109. , [inSSPIRE]
  • Gervais, J.-L., Sakita, B., Field theory interpretation ofsupergauges in dual models (1971) Nucl. Phys. B, 34, p. 632. , [inSSPIRE]
  • Volkov, D.V., Akulov, V.P., Is the neutrino a Goldstone particle? (1973) Phys. Lett. B, 46, p. 109. , [inSSPIRE]
  • Wess, J., Zumino, B., A Lagrangian model invariant under supergauge transformations (1974) Phys. Lett. B, 49, p. 52. , [inSSPIRE]
  • Wess, J., Zumino, B., Supergauge transformations in four-dimensions (1974) Nucl. Phys. B, 70, p. 39. , [inSSPIRE]
  • Dimopoulos, S., Georgi, H., Softly broken supersymmetry and SU(5) (1981) Nucl. Phys. B, 193, p. 150. , [inSSPIRE]
  • Witten, E., Dynamical breaking of supersymmetry (1981) Nucl. Phys. B, 188, p. 513. , [inSPIRE]
  • Dine, M., Fischler, W., Srednicki, M., Supersymmetric technicolor (1981) Nucl. Phys. B, 189, p. 575. , [inSSPIRE]
  • Dimopoulos, S., Raby, S., Supercolor (1981) Nucl. Phys. B, 192, p. 353. , [inSSPIRE]
  • Sakai, N., Naturalness in supersymmetric guts (1981) Z. Phys. C, 11, p. 153. , [inSSPIRE]
  • Kaul, R.K., Majumdar, P., Cancellation of quadratically divergent mass corrections in globally supersymmetric spontaneously broken gauge theories (1982) Nucl. Phys. B, 199, p. 36. , [inSSPIRE]
  • Fayet, P., Supersymmetry and weak, electromagnetic and strong interactions (1976) Phys. Lett. B, 64, p. 159. , [inSSPIRE]
  • Fayet, P., Spontaneously broken supersymmetric theories of weak, electromagnetic and strong interactions (1977) Phys. Lett. B, 69, p. 489. , [inSSPIRE]
  • Farrar, G.R., Fayet, P., Phenomenology of the production, decay and detection ofnew hadronic states associated with supersymmetry (1978) Phys. Lett. B, 76, p. 575. , [inSSPIRE]
  • Fayet, P., Relations between the masses of the superpartners ofleptons and quarks, the Goldstino couplings and the neutral currents (1979) Phys. Lett. B, 84, p. 416. , [inSSPIRE]
  • Barbieri, R., Giudice, G.F., Upper bounds on supersymmetric particle masses (1988) Nucl. Phys. B, 306, p. 63. , [inSSPIRE]
  • De Carlos, B., Casas, J.A., One loop analysis of the electroweak breaking in supersymmetric models and the fine tuning problem (1993) Phys. Lett. B, 309, p. 320. , [hep-ph/9303291] [inSPIRE]
  • Search for top and bottom squarks from gluino pair production in final states with missing transverse energy and at least three b-jets with the ATLAS detector (2012) Eur. Phys. J. C, 72, p. 2174. , [arXiv:1207.4686] [inSPIRE]
  • Search for new phenomena in final states with large jet multiplicities and missing transverse momentum at yfs = 8 TeV proton-proton collisions using the ATLAS experiment (2013) JEEP, 10, p. 130. , [arXiv:1308.1841] [inSPIRE]
  • Search for supersymmetry at yfs = 8 TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector (2014) JEEP, 6, p. 035. , [arXiv:1404.2500] [inSPIRE]
  • Search for gluino mediated bottom- and top-squark production in multijet final states in pp collisions at 8 TeV (2013) Phys. Lett. B, 725, p. 243. , [arXiv:1305.2390] [inSPIRE]
  • Search for supersymmetry in pp collisions at yfs = 8 TeV in events with a single lepton, large jet multiplicity and multiple b jets (2014) Phys. Lett. B, 733, p. 328. , [arXiv:1311.4937] [INSPIRE]
  • Search for new physics in events with same-sign dileptons and jets in pp collisions at yrS =8 TeV (2014) JEEP, 1, p. 163. , [arXiv:1311.6736] [INSPIRE]
  • Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at y/S =8 TeV (2014) JEEP, 6, p. 055. , [arXiv:1402.4770] [INSPIRE]
  • Chamseddine, A.H., Arnowitt, R.L., Nath, P., Locally supersymmetric grand unification (1982) Phys. Rev. Lett, 49. , [INSPIRE]
  • Barbieri, R., Ferrara, S., Savoy, C.A., Gauge models with spontaneously broken local supersymmetry (1982) Phys. Lett. B, 119. , [INSPIRE]
  • Ibafiez, L.E., Locally supersymmetric SU(5) grand unification (1982) Phys. Lett. B, 118, p. 73. , [INSPIRE]
  • Hall, L.J., Lykken, J.D., Weinberg, S., Supergravity as the messenger of supersymmetry breaking (1983) Phys. Rev. D, 27, p. 2359. , [INSPIRE]
  • Ohta, N., Grand unified theories based on local supersymmetry (1983) Prog. Theor. Phys, 70. , [INSPIRE]
  • Kane, G.L., Kolda, C.F., Roszkowski, L., Wells, J.D., Study of constrained minimal supersymmetry (1994) Phys. Rev. D, 49, p. 6173. , [hep-ph/9312272] [INSPIRE]
  • (2008) The ATLAS Experiment at the CERN Large Eadron Collider, , JINST 3 S08003 [INSPIRE]
  • Improved luminosity determination in pp collisions at y/S =7 TeV using the ATLAS detector at the LEC (2013) Eur. Phys. J. C, 73, p. 2518. , [arXiv:1302.4393] [INSPIRE]
  • Nason, P., A new method for combining NLO QCD with shower Monte Carlo algorithms (2004) JEEP, 11, p. 40. , [hep-ph/0409146] [INSPIRE]
  • Frixione, S., Nason, P., Oleari, C., Matching NLO QCD computations with parton shower simulations: The POWEEG method (2007) JEEP, 11, p. 070. , [arXiv:0709.2092] [INSPIRE]
  • Alioli, S., Nason, P., Oleari, C., Re, E., A general framework for implementing NLO calculations in shower Monte Carlo programs: The POWEEG BOX (2010) JEEP, 6, p. 043. , [arXiv:1002.2581] [INSPIRE]
  • Cacciari, M., Czakon, M., Mangano, M., Mitov, A., Nason, P., Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation (2012) Phys. Lett. B, 710, p. 612. , [arXiv:1111.5869] [INSPIRE]
  • Boarnreuther, P., Czakon, M., Mitov, A., Percent level precision physics at the Tevatron: First genuine NNLO QCD corrections to qi — ti+ X (2012) Phys. Rev. Lett, 109. , 132001[arXiv:1204.5201] [INSPIRE]
  • Czakon, M., Mitov, A., NNLO corrections to top-pair production at hadron colliders: The all-fermionic scattering channels (2012) JEEP, 12, p. 054. , [arXiv:1207.0236] [INSPIRE]
  • Czakon, M., Mitov, A., NNLO corrections to top pair production at hadron colliders: The quark-gluon reaction (2013) JEEP, 1, p. 080. , [arXiv:1210.6832] [INSPIRE]
  • Czakon, M., Fiedler, P., Mitov, A., Total top-quark pair-production cross section at hadron colliders through O(a%) (2013) Phys. Rev. Lett, 110. , 252004[arXiv:1303.6254] [inSPIRE]
  • 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. , [arXiv:1112.5675] [inSPIRE]
  • Skands, P.Z., Tuning Monte Carlo generators: The Perugia tunes (2010) Phys. Rev. D, 82. , 074018 [arXiv:1005.3457] [inSPIRE]
  • Lai, H.-L., New parton distributions for collider physics (2010) Phys. Rev. D, 82. , 074024 [arXiv:1007.2241] [inSPIRE]
  • Sjostrand, T., Mrenna, S., Skands, P.Z., PYTEIA 6.4 physics and manual (2006) JEEP, 5, p. 26. , [hep-ph/0603175] [inSPIRE]
  • (2011) ATLAS Tunes of PYTEIA 6 and PYTEIA 8 for MC11, , ATL-PHYS-PUB-2011-009, CERN, Geneva Switzerland
  • Corcella, G., EERWIG 6: An event generator for hadron emission reactions with interfering gluons (including supersymmetric processes) (2001) JEEP, 1, p. 10. , [hep-ph/0011363] [inSPIRE]
  • Alwall, J., Herquet, M., Maltoni, F., Mattelaer, O., Stelzer, T., MadGraph 5: Going beyond (2011) JEEP, 6, p. 128. , [arXiv:1106.0522] [inSPIRE]
  • Kersevan, B.P., Richter-Was, E., The Monte Carlo event generator AcerMC versions 2.0 to 3.8 with interfaces to PYTEIA 6.4, EERWIG 6.5 and ARIADNE 4.1, Comput (2013) Phys. Commun, 184, p. 919. , [hep-ph/0405247] [inSPIRE]
  • Kidonakis, N., Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production (2011) Phys. Rev. D, 83. , 91503 [arXiv:1103.2792] [inSPIRE]
  • Pumplin, J., New generation ofparton distributions with uncertainties from global QCD analysis (2002) JEEP, 7, p. 12. , [hep-ph/0201195] [inSPIRE]
  • Frixione, S., Webber, B.R., Matching NLO QCD computations and parton shower simulations (2002) JEEP, 6, p. 29. , [hep-ph/0204244] [inSPIRE]
  • Frixione, S., Laenen, E., Motylinski, P., Webber, B.R., Single-top production in MC@NLO (2006) JEEP, 3, p. 92. , [hep-ph/0512250] [inSPIRE]
  • Kidonakis, N., NNLL resummation for s-channel single top quark production (2010) Phys. Rev. D, 81. , 054028 [arXiv:1001.5034] [inSPIRE]
  • Kidonakis, N., Two-loop soft anomalous dimensions for single top quark associated production with a W- or H- (2010) Phys. Rev. D, 82. , 054018 [arXiv:1005.4451] [inSPIRE]
  • Garzelli, M.V., Kardos, A., Papadopoulos, C.G., Trócsanyi, Z., TtW± and tiZ hadroproduction at NLO accuracy in QCD with parton shower and hadronization effects (2012) JEEP, 11, p. 056. , [arXiv:1208.2665] [inSPIRE]
  • Dittmaier, S., Eandbook of LEC Eiggs Cross Sections: 2, , Differential distributions, arXiv:1201.3084 [inSPIRE]
  • (2012) Summary of ATLAS PYTEIA 8 Tunes, , ATL-PHYS-PUB-2012-003, CERN, Geneva Switzerland
  • Sjostrand, T., Mrenna, S., Skands, P.Z., A brief introduction to PYTEIA 8.1 (2008) Comput. Phys. Commun, 178, p. 852. , [arXiv:0710.3820] [inSPIRE]
  • Catani, S., Cieri, L., Ferrera, G., De Florian, D., Grazzini, M., Vector boson production at hadron colliders: A fully exclusive QCD calculation at NNLO (2009) Phys. Rev. Lett, 103. , 082001 [arXiv:0903.2120] [inSPIRE]
  • Martin, A.D., Stirling, W.J., Thorne, R.S., Watt, G., Parton distributions for the LEC (2009) Eur. Phys. J. C, 63, p. 189. , [arXiv:0901.0002] [inSPIRE]
  • Binoth, T., Ciccolini, M., Kauer, N., Kroamer, M., Gluon-induced W-boson pair production at the LEC (2006) JEEP, 12. , [hep-ph/0611170] [inSPIRE]
  • Bohr, M., EERWIG++ physics and manual (2008) Eur. Phys. J. C, 58, p. 639. , [arXiv:0803.0883] [inSPIRE]
  • Beenakker, W., Hopker, R., Spira, M., Zerwas, P.M., Squark and gluino production at hadron colliders (1997) Nucl. Phys. B, 492. , [hep-ph/9610490] [inSPIRE]
  • Kulesza, A., Motyka, L., Threshold resummation for squark-antisquark and gluino-pair production at the LEC (2009) Phys. Rev. Lett, 102, p. 111802. , [arXiv:0807.2405] [inSPIRE]
  • Kulesza, A., Motyka, L., Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LEC (2009) Phys. Rev. D, 80. , 095004[arXiv:0905.4749] [inSPIRE]
  • Beenakker, W., Soft-gluon resummation for squark and gluino hadroproduction (2009) JEEP, 12, p. 041. , [arXiv:0909.4418] [inSPIRE]
  • Beenakker, W., Squark and gluino hadroproduction (2011) Int. J. Mod. Phys. A, 26, p. 2637. , [arXiv:1105.1110] [inSPIRE]
  • Kramer, M., Supersymmetry Production Cross Sections in Pp Collisions at *JS =7 Tev, , arXiv:1206.2892 [inSPIRE]
  • The ATLAS simulation infrastructure (2010) Eur. Phys. J. C, 70, p. 823. , [arXiv:1005.4568] [inSPIRE]
  • Agostinelli, S., GEANT4: A simulation toolkit (2003) Nucl. Instrum. Meth. A, 506, p. 250. , [inSPIRE]
  • (2010) The Simulation Principle and Performance of the ATLAS Fast Calorimeter Simulation Fastcalosim, , ATL-PHYS-PUB-2010-013, CERN, Geneva Switzerland
  • Cacciari, M., Salam, G.P., Soyez, G., The anti-kt jet clustering algorithm (2008) JEEP, 4, p. 063. , [arXiv:0802.1189] [inSPIRE]
  • Jet energy measurement with the ATLAS detector in proton-proton collisions at yrs =7 TeV (2013) Eur. Phys. J. C, 73, p. 2304. , [arXiv:1112.6426] [inSPIRE]
  • Cacciari, M., Salam, G.P., Pileup subtraction using jet areas (2008) Phys. Lett. B, 659, p. 119. , [arXiv:0707.1378] [inSPIRE]
  • (2012) Measurement of the B-Tag Efficiency in a Sample of Jets Containing Muons with 5Fb-1 of Data from the ATLAS Detector, , ATLAS-CONF-2012-043, CERN, Geneva Switzerland
  • (2012) B-Jet Tagging Calibration on C-Jets Containing D*+ Mesons, , ATLAS-CONF-2012-039, CERN, Geneva Switzerland
  • (2012) Measurement of the Mistag Rate with 5Fb-1 of Data Collected by the ATLAS Detector, , ATLAS-CONF-2012-040, CERN, Geneva Switzerland
  • (2014) Calibration of B-Tagging Using Dileptonic Top Pair Events in a Combinatorial Likelihood Approach with the ATLAS Experiment, , ATLAS-CONF-2014-004, CERN, Geneva Switzerland
  • Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LEC proton-proton collision data Eur. Phys. J. C, 74 (2014), p. 2941. , [arXiv:1404.2240] [inSPIRE]
  • (2013) Preliminary Results on the Muon Reconstruction Efficiency, Momentum Resolution and Momentum Scale in ATLAS 2012 Pp Collision Data, , ATLAS-CONF-2013-088, CERN, Geneva Switzerland
  • Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS (2012) Eur. Phys. J. C, 72, p. 1844. , [arXiv:1108.5602] [inSPIRE]
  • (2013) Characterisation and Mitigation of Beam-Induced Backgrounds Observed in the ATLAS Detector during the 2011 Proton-Proton Run, , JINST 8 P07004 [arXiv:1303.0223] [inSPIRE]
  • Measurement of the top quark-pair production cross section with ATLAS in pp collisions at vrS =7 TeV (2011) Eur. Phys. J. C, 71, p. 1577. , [arXiv:1012.1792] [inSPIRE]
  • Cowan, G., Cranmer, K., Gross, E., Vitells, O., Asymptotic formulae for likelihood-based tests of new physics (2011) Eur. Phys. J. C, 71, p. 1554. , [arXiv:1007.1727] [inSPIRE]
  • Single hadron response measurement and calorimeter jet energy scale uncertainty with the ATLAS detector at the LEC (2013) Eur. Phys. J. C, 73, p. 2305. , [arXiv:1203.1302] [inSPIRE]
  • Pumplin, J., Uncertainties of predictions from parton distribution functions. 2. The Eessian method (2001) Phys. Rev. D, 65. , 014013 [hep-ph/0101032] [inSPIRE]
  • Read, A.L., Presentation of search results: The CLs technique (2002) J. Phys. G, 28, p. 2693. , [inSPIRE]
  • Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in y/S = 8 TeV pp collisions with the ATLAS detector (2013) JEEP, 10, p. 189. , [arXiv:1308.2631] [inSPIRE]
  • Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at y/S =8 TeV with the ATLAS detector (2014) JEEP, 9, p. 015. , [arXiv:1406.1122] [inSPIRE]
  • Search for direct top squark pair production in final states with one isolated lepton, jets and missing transverse momentum in y/S =7 TeV pp collisions using 4.7fb-1 of ATLAS data (2012) Phys. Rev. Lett, 109. , 211803[arXiv:1208.2590] [inSPIRE]

Citas:

---------- APA ----------
(2014) . Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets at √s = 8 TeV proton-proton collisions with the ATLAS detector. Journal of High Energy Physics, 2014(10).
http://dx.doi.org/10.1007/JHEP10(2014)024
---------- CHICAGO ----------
Aad, G. "Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets at √s = 8 TeV proton-proton collisions with the ATLAS detector" . Journal of High Energy Physics 2014, no. 10 (2014).
http://dx.doi.org/10.1007/JHEP10(2014)024
---------- MLA ----------
Aad, G. "Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets at √s = 8 TeV proton-proton collisions with the ATLAS detector" . Journal of High Energy Physics, vol. 2014, no. 10, 2014.
http://dx.doi.org/10.1007/JHEP10(2014)024
---------- VANCOUVER ----------
Aad, G. Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets at √s = 8 TeV proton-proton collisions with the ATLAS detector. J. High Energy Phys. 2014;2014(10).
http://dx.doi.org/10.1007/JHEP10(2014)024