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 is presented for new physics in events with two isolated leptons (e or μ) having the same electric charge. The data are selected from events collected from pp collisions at √s = 7 TeV by the ATLAS detector and correspond to an integrated luminosity of 34 pb-1. The spectra in dilepton invariant mass, missing transverse momentum and jet multiplicity are presented and compared to Standard Model predictions. In this event sample, no evidence is found for contributions beyond those of the Standard Model. Limits are set on the cross-section in a fiducial region for new sources of same-sign high-mass dilepton events in the ee, eμ and μμ channels. Four models predicting same-sign dilepton signals are constrained: two descriptions of Majorana neutrinos, a cascade topology similar to supersymmetry or universal extra dimensions, and fourth generation d-type quarks. Assuming a new physics scale of 1 TeV, Majorana neutrinos produced by an effective operator V with masses below 460 GeV are excluded at 95% confidence level. A lower limit of 290 GeV is set at 95% confidence level on the mass of fourth generation d-type quarks. Copyright CERN.

Registro:

Documento: Artículo
Título:Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 3024 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 3024 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Hadron-hadron scattering
Año:2011
Volumen:2011
Número:10
Página de inicio:1
Página de fin:47
DOI: http://dx.doi.org/10.1007/JHEP10(2011)107
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_v2011_n10_p1_Aad

Referencias:

  • Aad, G., Search for supersymmetric particles in events with lepton pairs and large missing transverse momentum in √s = 7 TeV proton-proton collisions with the ATLAS experiment (2011) Eur. Phys. J. C, 71, p. 1682. , ATLAS collaboration, [arXiv:1103.6214] [SPIRES]
  • Chatrchyan, S., Search for new physics with same-sign isolated dilepton events with jets and missing transverse energy at the LHC (2011) JHEP, 6, p. 077. , CMS collaboration, [arXiv:1104.3168] [SPIRES]
  • Abulencia, A., Inclusive search for new physics with like-sign dilepton events in pp̄ collisions at √s = 1:9 6-TeV (2007) Phys. Rev. Lett., 98, p. 221803. , CDF collaboration, [hep-ex/0702051] [SPIRES]
  • Acosta, D., Inclusive search for anomalous production of high-p<inf>T</inf> like-sign lepton pairs in pp̄ collisions at √s = 1:8 TeV (2004) Phys. Rev. Lett., 93, p. 061802. , CDF collaboration, [hep-ex/0405063] [SPIRES]
  • Chatrchyan, S., Search for a Heavy Bottom-like Quark in pp Collisions at √s = 7 TeV (2011) Phys. Lett. B, 701, p. 204. , CMS collaboration, [arXiv:1102.4746] [SPIRES]
  • Aaltonen, T., Search for New Bottomlike Quark Pair Decays QQ̄ → (tW ∓)(t̄W±) in Same-Charge Dilepton Events (2010) Phys. Rev. Lett., 104, p. 091801. , CDF collaboration, [arXiv:0912.1057] [SPIRES]
  • Abazov, V.M., Search for W-prime Boson Resonances Decaying to a Top Quark and a Bottom Quark (2008) Phys. Rev. Lett., 100, p. 211803. , D0 collaboration, [arXiv:0803.3256] [SPIRES]
  • Aaltonen, T., Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp̄ Collisions at √s = 1:96 TeV (2009) Phys. Rev. Lett., 102, p. 041801. , CDF collaboration, [arXiv:0809.4903] [SPIRES]
  • Affolder, T., Search for gluinos and squarks using like sign dileptons in pp̄ collisions at √s = 1:8 TeV (2001) Phys. Rev. Lett., 87, p. 251803. , CDF collaboration, [hep-ex/0106061] [SPIRES]
  • Abe, F., Search for R-parity violating supersymmetry using like sign dielectrons in pp̄ collisions at √s = 1:8 TeV (1999) Phys. Rev. Lett., 83, p. 2133. , CDF collaboration, [hep-ex/9908063] [SPIRES]
  • Abazov, V.M., Search for associated Higgs boson production WH → WWW*→ l=ν.L′±ν′ + X in pp̄ collisions at √s = 1:96 TeV (2006) Phys. Rev. Lett., 97, p. 151804. , D0 collaboration, [hep-ex/0607032] [SPIRES]
  • Del Aguila, F., Bar-Shalom, S., Soni, A., Wudka, J., Heavy Majorana Neutrinos in the Effective Lagrangian Description: Application to Hadron Colliders (2009) Phys. Lett. B, 670, p. 399. , [arXiv:0806.0876] [SPIRES]
  • Keung, W.-Y., Senjanović, G., Majorana neutrinos and the production of the right-handed charged gauge boson (1983) Phys. Rev. Lett., 50, p. 1427. , SPIRES
  • Abachi, S., Search for right-handed W bosons and heavy w-prime in pp̄ collisions at √s = 1:8 TeV (1996) Phys. Rev. Lett., 76, p. 3271. , D0 collaboration, [hep-ex/9512007] [SPIRES]
  • Mohapatra, R.N., Pati, J.C., A Natural Left-Right Symmetry (1975) Phys. Rev. D, 11, p. 2558. , SPIRES
  • Aaltonen, T., Search for heavy bottom-like quarks decaying to an electron or muon and jets in pp̄ collisions at √s = 1:96 TeV (2011) Phys. Rev. Lett., 106, p. 141803. , The CDF collaboration, [arXiv:1101.5728] [SPIRES]
  • Alwall, J., Schuster, P., Toro, N., Simplified Models for a First Characterization of New Physics at the LHC (2009) Phys. Rev. D, 79, p. 075020. , [arXiv:0810.3921] [SPIRES]
  • Frampton, P.H., Hung, P.Q., Sher, M., Quarks and leptons beyond the third generation (2000) Phys. Rept., 330, p. 263. , [hep-ph/9903387] [SPIRES]
  • Aad, G., The ATLAS Experiment at the CERN Large Hadron Collider (2008) JINST, 3, pp. S08003. , ATLAS collaboration, [SPIRES]
  • Aad, G., Measurement of the W - > lν and Z/γ* → ll production cross sections in proton-proton collisions at √s = 7 TeV with the ATLAS detector (2010) JHEP, 12, p. 060. , ATLAS collaboration, [arXiv:1010.2130] [SPIRES]
  • Aad, G., The ATLAS Simulation Infrastructure (2010) Eur. Phys. J. C, 70, p. 823. , ATLAS collaboration, [arXiv:1005.4568] [SPIRES]
  • Agostinelli, S., GEANT4: A simulation toolkit (2003) Nucl. Instrum. Meth. A, 506, p. 250. , GEANT4 collaboration, [SPIRES]
  • (2010) ATLAS Monte Carlo Tunes for MC09, , ATLAS collaboration, ATL-PHYS-PUB-2010-002
  • Mangano, M.L., Moretti, M., Piccinini, F., Pittau, R., Polosa, A.D., ALPGEN, a generator for hard multiparton processes in hadronic collisions (2003) JHEP, 7, p. 001. , [hep-ph/0206293] [SPIRES]
  • Pumplin, J., New Generation of Parton Distributions with Uncertainties from Global QCD Analysis (2002) JHEP, 7, p. 012
  • Marchesini, G., HERWIG: A Monte Carlo event generator for simulating hadron emission reactions with interfering gluons. Version 5.1 - April 1991 (1992) Comput. Phys. Commun., 67, p. 465. , SPIRES
  • Corcella, G., HERWIG 6.5: An event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes) (2001) JHEP, 1, p. 010. , [hep-ph/0011363] [SPIRES]
  • Corcella, G., HERWIG 6.5 Release Note, , hep-ph/0210213 [SPIRES]
  • Sherstnev, A., Thorne, R.S., Parton Distributions for LO Generators (2008) Eur. Phys. J. C, 55, p. 553. , [arXiv:0711.2473] [SPIRES]
  • Alwall, J., MadGraph/MadEvent v4: The New Web Generation (2007) JHEP, 9, p. 028. , [arXiv:0706.2334] [SPIRES]
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., PYTHIA 6.4 Physics and Manual (2006) JHEP, 5, p. 026. , [hep-ph/0603175] [SPIRES]
  • Frixione, S., Webber, B.R., Matching NLO QCD computations and parton shower simulations (2002) JHEP, 6, p. 029. , [hep-ph/0204244] [SPIRES]
  • Frixione, S., Nason, P., Webber, B.R., Matching NLO QCD and parton showers in heavy flavour production (2003) JHEP, 8, p. 007. , [hep-ph/0305252] [SPIRES]
  • Aliev, M., HATHOR: HAdronic Top and Heavy quarks crOss section calculatoR (2011) Comput. Phys. Commun., 182, p. 1034. , [arXiv:1007.1327] [SPIRES]
  • Hassani, S., A muon identification and combined reconstruction procedure for the ATLAS detector at the LHC using the (MUONBOY, STACO, MuTag) reconstruction packages (2007) Nucl. Instrum. Meth. A, 572, p. 77. , SPIRES
  • Cacciari, M., Salam, G.P., Soyez, G., The anti-k<inf>t</inf> jet clustering algorithm (2008) JHEP, 4, p. 063. , [arXiv:0802.1189] [SPIRES]
  • Cacciari, M., Salam, G.P., Dispelling the N3 myth for the k<inf>t</inf> jet-finder (2006) Phys. Lett. B, 641, p. 57. , [hep-ph/0512210] [SPIRES]
  • Jet energy scale and its systematic uncertainty in proton-proton collisions at √s = 7 TeV with ATLAS 2010 data (2011) ATLAS-CONF-2011-032, , ATLAS collaboration
  • Aad, G., Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV (2011) Eur. Phys. J. C, 71, p. 1577. , ATLAS collaboration, [arXiv:1012.1792] [SPIRES]
  • Aad, G., Search for Diphoton Events with Large Missing Transverse Energy in 7 TeV Proton-Proton Collisions with the ATLAS Detector (2011) Phys. Rev. Lett., 106, p. 121803. , ATLAS collaboration, [arXiv:1012.4272] [SPIRES]
  • Zhong, J., Huang, R.-S., Lee, S.-C., A program for the Bayesian Neural Network in the ROOT framework (2011) Comput. Phys. Commun., 182, p. 2655. , [arXiv:1103.2854] [SPIRES]
  • Hocker, A., TMVA - Toolkit for Multivariate Data Analysis, , PoS(ACAT08)040
  • MacKay, D.J.C., Probable networks and plausible predictions - A review of practical Bayesian methods for supervised neural networks (1995) Net. Comp. Neu. Sys., 6, p. 469
  • Updated Luminosity Determination in pp Collisions at √s = 7 TeV using the ATLAS Detector (2011) ATLAS-CONF-2011-011, , ATLAS collaboration
  • Aad, G., Luminosity Determination in pp Collisions at √s = 7 TeV Using the ATLAS Detector at the LHC (2011) Eur. Phys. J. C, 71, p. 1630. , ATLAS collaboration, [arXiv:1101.2185] [SPIRES]
  • Appelquist, T., Cheng, H.-C., Dobrescu, B.A., Bounds on universal extra dimensions (2001) Phys. Rev. D, 64, p. 035002. , [hep-ph/0012100] [SPIRES]
  • Rizzo, T.G., Probes of universal extra dimensions at colliders (2001) Phys. Rev. D, 64, p. 095010. , [hep-ph/0106336] [SPIRES]
  • Meade, P., Reece, M., BRIDGE: Branching Ratio Inquiry/decay Generated Events, , hep-ph/0703031 [SPIRES]
  • Massey Jr., F.J., The Kolmogorov-Smirnov Test for Goodness of Fit (1951) J. Am. Stat. Ass., 46, p. 68
  • Feldman, G.J., Cousins, R.D., A Unified Approach to the Classical Statistical Analysis of Small Signals (1998) Phys. Rev. D, 57, p. 3873. , physics/9711021
  • Pukhov, A., CalcHEP 2.3: MSSM, Structure Functions, Event Generation, Batchs and Generation of Matrix Elements for Other Packages, , hep-ph/0412191 [SPIRES]

Citas:

---------- APA ----------
(2011) . Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector. Journal of High Energy Physics, 2011(10), 1-47.
http://dx.doi.org/10.1007/JHEP10(2011)107
---------- CHICAGO ----------
Aad, G. "Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector" . Journal of High Energy Physics 2011, no. 10 (2011) : 1-47.
http://dx.doi.org/10.1007/JHEP10(2011)107
---------- MLA ----------
Aad, G. "Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector" . Journal of High Energy Physics, vol. 2011, no. 10, 2011, pp. 1-47.
http://dx.doi.org/10.1007/JHEP10(2011)107
---------- VANCOUVER ----------
Aad, G. Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector. J. High Energy Phys. 2011;2011(10):1-47.
http://dx.doi.org/10.1007/JHEP10(2011)107