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Abstract:

A search for new phenomena in final states characterized by high jet multiplicity, an isolated lepton (electron or muon) and either zero or at least three b-tagged jets is presented. The search uses 36.1 fb −1 of s=13 TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider in 2015 and 2016. The dominant sources of background are estimated using parameterized extrapolations, based on observables at medium jet multiplicity, to predict the b-tagged jet multiplicity distribution at the higher jet multiplicities used in the search. No significant excess over the Standard Model expectation is observed and 95% confidence-level limits are extracted constraining four simplified models of R-parity-violating supersymmetry that feature either gluino or top-squark pair production. The exclusion limits reach as high as 2.1 TeV in gluino mass and 1.2 TeV in top-squark mass in the models considered. In addition, an upper limit is set on the cross-section for Standard Model tt¯ tt¯ production of 60 fb (6.5 × the Standard Model prediction) at 95% confidence level. Finally, model-independent limits are set on the contribution from new phenomena to the signal-region yields.[Figure not available: see fulltext.]. © 2017, The Author(s).

Registro:

Documento: Artículo
Título:Search for new phenomena in a lepton plus high jet multiplicity final state with the ATLAS experiment using √s=13 TeV proton-proton collision data
Autor:The ATLAS collaboration et al.
Este artículo contiene 2861 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2861 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Beyond Standard Model; Hadron-Hadron scattering (experiments)
Año:2017
Volumen:2017
Número:9
DOI: http://dx.doi.org/10.1007/JHEP09(2017)088
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_v2017_n9_p_TheATLAScollaboration

Referencias:

  • Lisanti, M., Schuster, P., Strassler, M., Toro, N., Study of LHC searches for a lepton and many jets (2012) JHEP, 11, p. 081. , arXiv:1107.5055] [INSPI
  • Evans, J.A., Kats, Y., Shih, D., Strassler, M.J., Toward full LHC coverage of natural supersymmetry (2014) JHEP, 7, p. 101. , arXiv:1310.5758] [INSPI
  • Extension of the algebra of Poincaré group generators and violation of p invariance (1971) JETP Lett. 13 (1971) 323 [Pisma Zh. Eksp. Teor. Fiz., , Yu. A. Golfand and E.P. Likhtman452] [
  • Volkov, D.V., Akulov, V.P., Is the neutrino a goldstone particle? (1973) Phys. Lett., B 46, p. 109. , INSPI
  • Wess, J., Zumino, B., Supergauge transformations in four-dimensions (1974) Nucl. Phys., B 70, p. 39. , INSPI
  • Wess, J., Zumino, B., Supergauge invariant extension of quantum electrodynamics (1974) Nucl. Phys., B 78, p. 1. , INSPI
  • Ferrara, S., Zumino, B., Supergauge invariant Yang-Mills theories (1974) Nucl. Phys., B 79, p. 413. , INSPI
  • Salam, A., Strathdee, J.A., Supersymmetry and nonabelian gauges (1974) Phys. Lett., B 51, p. 353. , INSPI
  • Search for massive supersymmetric particles decaying to many jets using the ATLAS detector in pp collisions at √ s=8 TeV (2015) Phys. Rev. D, , ATLAS collaboration112016 [
  • Search for new phenomena in events with high jet multiplicity and low missing transverse momentum in proton-proton collisions at √ s=8 TeV (2017) Phys. Lett. B, , CMS collaboration257 [
  • Searches for R-parity-violating supersymmetry in pp collisions at √ s=8 TeV in final states with 0-4 leptons (2016) Phys. Rev. D, , CMS collaboration112009 [
  • Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb −1 of √ s=13 TeV pp collision data with the ATLAS detector, , ATLAS collaboration
  • Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s=8 TeV with the ATLAS detector (2015) JHEP, , ATlAS collaboration105 [
  • Search for standard model production of four top quarks in proton-proton collisions at √ s=13 TeV (2017) Phys. Lett. B, , 772 336 [] [
  • The ATLAS experiment at the CERN Large Hadron Collider, , ATLAS collaboration2008 JINST 3 S08003
  • ATLAS-TDR-19 (2010) (2012) addendum ATLAS-TDR-19-ADD-1
  • Performance of the ATLAS trigger system in 2015 (2017) Eur. Phys. J. C, , 77 317 [] [
  • Luminosity determination in pp collisions at √ s=8 TeV using the ATLAS detector at the LHC (2016) Eur. Phys. J. C, , 76 653 [] [
  • The ATLAS simulation infrastructure (2010) Eur. Phys. J. C, , 70 823 [] [
  • S. Agostinelli et al., GEANT4 — a Simulation toolkit (2003) Nucl. Instrum. Meth. A, , 506 250 [
  • The simulation principle and performance of the ATLAS fast calorimeter simulation FastCaloSim (2010) ATL-PHYS-PUB-2010-013
  • A brief introduction to PYTHIA 8.1 (2008) Comput. Phys. Commun., , T. Sjöstrand, S. Mrenna and P.Z. Skands852 [] [
  • Further ATLAS tunes of PYTHIA6 and PYTHIA 8 (2011) ATL-PHYS-PUB-2011-014
  • Sherstnev, A., Thorne, R.S., Parton distributions for LO generators (2008) Eur. Phys. J., 100, p. 553. , arXiv:0711.2473] [INSPI
  • Lange, D.J., The EvtGen particle decay simulation package (2001) Nucl. Instrum. Meth., A 462, p. 152. , INSPI
  • Minimal flavor violation: an effective field theory approach (2002) Nucl. Phys. B, , G. D’Ambrosio, G.F. Giudice, G. Isidori and A. Strumia155 [] [
  • Csáki, C., Grossman, Y., Heidenreich, B., MFV SUSY: a natural theory for R-parity violation (2012) Phys. Rev., 500. , arXiv:1111.1239] [INSPI
  • A search for top squarks with R-parity-violating decays to all-hadronic final states with the ATLAS detector in √ s=8 TeV proton-proton collisions (2016) JHEP, , ATLAS collaboration067 [
  • HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes) (2001) JHEP, , G. Corcella et al.010 [] [
  • New generation of parton distributions with uncertainties from global QCD analysis (2002) JHEP, , J. Pumplin et al.012 [] [
  • Gieseke, S., Rohr, C., Siodmok, A., Colour reconnections in HERWIG++ (2012) Eur. Phys. J., 100, p. 2225. , arXiv:1206.0041] [INSPI
  • Alwall, J., The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations (2014) JHEP, 7, p. 079. , arXiv:1405.0301] [INSPI
  • ATLAS Pythia 8 tunes to 7 TeV data (2014) ATL-PHYS-PUB-2014-021
  • Ball, R.D., Parton distributions with LHC data (2013) Nucl. Phys., B 867, p. 244. , arXiv:1207.1303] [INSPI
  • Squark and gluino production at hadron colliders (1997) Nucl. Phys. B, , W. Beenakker, R. Hopker, M. Spira and P.M. Zerwas51 [] [
  • Kulesza, A., Motyka, L., Threshold resummation for squark-antisquark and gluino-pair production at the LHC (2009) Phys. Rev. Lett., 102, p. 111802. , arXiv:0807.2405] [INSPI
  • Kulesza, A., Motyka, L., Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC (2009) Phys. Rev., 500. , arXiv:0905.4749] [INSPI
  • Beenakker, W., Soft-gluon resummation for squark and gluino hadroproduction (2009) JHEP, 12, p. 041. , arXiv:0909.4418] [INSPI
  • Beenakker, W., Squark and Gluino Hadroproduction (2011) Int. J. Mod. Phys., A 26, p. 2637. , arXiv:1105.1110] [INSPI
  • Borschensky, C., Krämer, M., Kulesza, A., Mangano, M., Padhi, S., Plehn, T., Squark and gluino production cross sections in pp collisions at s = 13, 14, 33 and 100 TeV (2014) Eur. Phys. J., 100, p. 3174. , arXiv:1407.5066] [INSPI
  • (2016) Simulation of top-quark production for the ATLAS experiment at √ s=13 TeV
  • (2016) Monte Carlo Generators for the Production of a W or Z/γ ∗ Boson in Association with Jets at ATLAS in Run 2
  • Multi-boson simulation for 13 TeV ATLAS analyses, , ATLAS collabration, (2016
  • (2016) Z) processes for √ s=13 TeV ATLAS analyses
  • Event generation with SHERPA 1.1 (2009) JHEP, , T. Gleisberg et al.007 [] [
  • 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. , arXiv:0903.2120] [INSPI
  • Lai, H.-L., New parton distributions for collider physics (2010) Phys. Rev., 500. , arXiv:1007.2241] [INSPI
  • a generator for hard multiparton processes in hadronic collisions (2003) JHEP, , M.L. Mangano, M. Moretti, F. Piccinini, R. Pittau and A.D. Polosa, ALPGEN001 [] [
  • PYTHIA 6.4 physics and manual (2006) JHEP, , T. Sjöstrand, S. Mrenna and P.Z. Skands026 [] [
  • Skands, P.Z., Tuning Monte Carlo generators: the Perugia tunes (2010) Phys. Rev., 500. , arXiv:1005.3457] [INSPI
  • Alioli, S., Nason, P., Oleari, C., Re, E., A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX (2010) JHEP, 6, p. 043. , arXiv:1002.2581] [INSPI
  • Czakon, M., Fiedler, P., Mitov, A., Total top-quark pair-production cross section at hadron colliders through O(α S 4 ) (2013) Phys. Rev. Lett., 110, p. 252004. , arXiv:1303.6254] [INSPI
  • Czakon, M., Mitov, A., NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction (2013) JHEP, 1, p. 080. , arXiv:1210.6832] [INSPI
  • Czakon, M., Mitov, A., NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels (2012) JHEP, 12, p. 054. , arXiv:1207.0236] [INSPI
  • Bärnreuther, P., Czakon, M., Mitov, A., Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to qq¯ → tt¯ + X (2012) Phys. Rev. Lett., 109, p. 132001. , arXiv:1204.5201] [INSPI
  • Cacciari, M., 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] [INSPI
  • 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] [INSPI
  • Kidonakis, N., Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production (2011) Phys. Rev., 500. , arXiv:1103.2792] [INSPI
  • Kidonakis, N., Two-loop soft anomalous dimensions for single top quark associated production with a W − or H − (2010) Phys. Rev., 500. , arXiv:1005.4451] [INSPI
  • Kidonakis, N., NNLL resummation for s-channel single top quark production (2010) Phys. Rev., 500. , arXiv:1001.5034] [INSPI
  • Handbook of LHC Higgs cross sections: 1. Inclusive observables, , LHC Higgs Cross section Working Group collaboration, S. Dittmaier et al
  • Cacciari, M., Salam, G.P., Soyez, G., The anti-k t jet clustering algorithm (2008) JHEP, 4, p. 063. , arXiv:0802.1189] [INSPI
  • Dispelling the N 3 myth for the k t jet-finder (2006) Phys. Lett. B, , M. Cacciari and G.P. Salam57 [] [
  • Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1 (2017) Eur. Phys. J. C, , 77 490 [] [
  • Cacciari, M., Salam, G.P., Pileup subtraction using jet areas (2008) Phys. Lett., B 659, p. 119. , arXiv:0707.1378] [INSPI
  • Pile-up subtraction and suppression for jets in ATLAS (2013) ATLAS-CONF-2013-083
  • Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at √ s=13 TeV with the ATLAS detector, , ATLAS collaboration
  • Tagging and suppression of pileup jets with the ATLAS detector (2014) ATLAS-CONF-2014-018
  • Selection of jets produced in 13 TeV proton-proton collisions with the ATLAS detector (2015) ATLAS-CONF-2015-029
  • Performance of b-jet identification in the ATLAS experiment, , ATLAS collaboration2016 JINST 11 P04008 []
  • Optimisation of the ATLAS b-tagging performance for the 2016 LHC Run (2016) ATL-PHYS-PUB-2016-012
  • Muon reconstruction performance of the ATLAS detector in proton-proton collision data at √ s=13 TeV (2016) Eur. Phys. J. C, , 76 292 [] [
  • Electron efficiency measurements with the ATLAS detector using the 2015 LHC proton-proton collision data (2016) ATLAS-CONF-2016-024
  • (2015) Electron identification measurements in ATLAS using √ s=13 TeV data with 50 ns bunch spacing
  • Ellis, S.D., Kleiss, R., Stirling, W.J., W ’s, Z’s and jets (1985) Phys. Lett., B 154, p. 435. , INSPI
  • Z events at pp¯ colliders (1989) Phys. Lett. B, , F.A. Berends, W.T. Giele, H. Kuijf, R. Kleiss and W.J. Stirling, Multi-jet production in W237 [
  • Giele, W.T., Stirling, W.J., Top search at Fermilab: multi-jet signals and backgrounds (1990) Nucl. Phys., B 343, p. 14. , INSPI
  • Gerwick, E., Plehn, T., Schumann, S., Schichtel, P., Scaling patterns for QCD jets (2012) JHEP, 10, p. 162. , arXiv:1208.3676] [INSPI
  • Measurement of the production cross section of jets in association with a Z boson in pp collisions at √ s=7 TeV with the ATLAS detector (2013) JHEP, , ATLAS collaboration032 [
  • Measurements of the production cross section of a Z boson in association with jets in pp collisions at √ s=13 TeV with the ATLAS detector (2017) Eur. Phys. J. C, , 77 361 [] [
  • Jet production rates in association with W and Z bosons in pp collisions at √ s=7 TeV (2012) JHEP, , 01 010 [] [
  • (2012) Measurements of the photon identification efficiency with the ATLAS detector using 4.9 fb −1 of pp collision data collected in 2011
  • Search for supersymmetry at √ s=13 TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector (2016) Eur. Phys. J. C, , 76 259 [] [
  • (2015) Performance of missing transverse momentum reconstruction with the ATLAS detector in the first proton-proton collisions at √ s=13 TeV
  • (2015) Expected performance of missing transverse momentum reconstruction for the ATLAS detector at √ s=13 TeV
  • The PDF4LHC working group interim recommendations, , M. Botje et al
  • Asymptotic formulae for likelihood-based tests of new physics (2013) Eur. Phys. J. C 71 (2011) 1554, , G. Cowan, K. Cranmer, E. Gross and O. Vitells2501] [] [
  • Read, A.L., Presentation of search results: The CL technique (2002) J. Phys., G 28, p. 2693. , INSPI
  • Measurement of the cross section ratio σ t t¯ b b¯ / σ t t¯ j j in pp collisions at √ s=8 TeV (2015) Phys. Lett. B, , CMD collaboration132 [
  • Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb¯ in pp collisions at √ s=8 TeV with the ATLAS detector (2015) Eur. Phys. J. C, , 75 349 [] [
  • ATLAS computing acknowledgements 2016-2017 (2016) ATL-GEN-PUB-2016-002

Citas:

---------- APA ----------
(2017) . Search for new phenomena in a lepton plus high jet multiplicity final state with the ATLAS experiment using √s=13 TeV proton-proton collision data. Journal of High Energy Physics, 2017(9).
http://dx.doi.org/10.1007/JHEP09(2017)088
---------- CHICAGO ----------
The ATLAS collaboration. "Search for new phenomena in a lepton plus high jet multiplicity final state with the ATLAS experiment using √s=13 TeV proton-proton collision data" . Journal of High Energy Physics 2017, no. 9 (2017).
http://dx.doi.org/10.1007/JHEP09(2017)088
---------- MLA ----------
The ATLAS collaboration. "Search for new phenomena in a lepton plus high jet multiplicity final state with the ATLAS experiment using √s=13 TeV proton-proton collision data" . Journal of High Energy Physics, vol. 2017, no. 9, 2017.
http://dx.doi.org/10.1007/JHEP09(2017)088
---------- VANCOUVER ----------
The ATLAS collaboration. Search for new phenomena in a lepton plus high jet multiplicity final state with the ATLAS experiment using √s=13 TeV proton-proton collision data. J. High Energy Phys. 2017;2017(9).
http://dx.doi.org/10.1007/JHEP09(2017)088