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Abstract:

This Letter presents a search for heavy charged long-lived particles produced in proton–proton collisions at s=13TeV at the LHC using a data sample corresponding to an integrated luminosity of 36.1fb −1 collected by the ATLAS experiment in 2015 and 2016. These particles are expected to travel with a velocity significantly below the speed of light, and therefore have a specific ionisation higher than any high-momentum Standard Model particle of unit charge. The pixel subsystem of the ATLAS detector is used in this search to measure the ionisation energy loss of all reconstructed charged particles which traverse the pixel detector. Results are interpreted assuming the pair production of R-hadrons as composite colourless states of a long-lived gluino and Standard Model partons. No significant deviation from Standard Model background expectations is observed, and lifetime-dependent upper limits on R-hadron production cross-sections and gluino masses are set, assuming the gluino always decays to two quarks and a 100 GeV stable neutralino. R-hadrons with lifetimes above 1.0 ns are excluded at the 95% confidence level, with lower limits on the gluino mass ranging between 1290 GeV and 2060 GeV. In the case of stable R-hadrons, the lower limit on the gluino mass at the 95% confidence level is 1890 GeV. © 2018 The Author

Registro:

Documento: Artículo
Título:Search for heavy charged long-lived particles in proton–proton collisions at s=13TeV using an ionisation measurement with the ATLAS detector
Autor:Aaboud, M. et al.
Este artículo contiene 2934 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2934 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2019
Volumen:788
Página de inicio:96
Página de fin:116
DOI: http://dx.doi.org/10.1016/j.physletb.2018.10.055
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_03702693_v788_n_p96_Aaboud

Referencias:

  • Susskind, L., The gauge hierarchy problem, technicolour, supersymmetry, and all that (1984) Phys. Rep., 104, p. 181
  • Dreiner, H.K., An introduction to explicit R-parity violation (2010) Adv. Ser. Dir. High Energy Phys., 21, p. 565
  • Berger, E.L., Sullivan, Z., Lower limits on R-parity-violating couplings in supersymmetry (2004) Phys. Rev. Lett., 92
  • Barbier, R., R-parity violating supersymmetry (2005) Phys. Rep., 420, p. 1
  • Kolda, C.F., Gauge-mediated supersymmetry breaking: introduction, review and update (1998) Nucl. Phys. Proc. Suppl., 62, p. 266
  • Baer, H., Cheung, K., Gunion, J.F., A heavy gluino as the lightest supersymmetric particle (1999) Phys. Rev. D, 59
  • Gates, S.J., Jr., Lebedev, O., Searching for supersymmetry in hadrons (2000) Phys. Lett. B, 477, p. 216
  • Mafi, A., Raby, S., An analysis of a heavy gluino LSP at CDF: the heavy gluino window (2000) Phys. Rev. D, 62
  • Chertok, M.B., Phenomenology of a constrained standard model from an extra dimension (2001) eConf, C010630, p. P310
  • Giudice, G.F., Romanino, A., Split supersymmetry (2004) Nucl. Phys. B, 699, p. 65
  • Arkani-Hamed, N., Dimopoulos, S., Giudice, G.F., Romanino, A., Aspects of split supersymmetry (2005) Nucl. Phys. B, 709, p. 3
  • Fairbairn, M., Stable massive particles at colliders (2007) Phys. Rep., 438, p. 1
  • Buckley, M.R., Randall, L., Shuve, B., LHC searches for non-chiral weakly charged multiplets (2011) J. High Energy Phys., 5
  • Arkani-Hamed, N., Dimopoulos, S., Supersymmetric unification without low energy supersymmetry and signatures for fine-tuning at the LHC (2005) J. High Energy Phys., 6
  • Arvanitaki, A., Craig, N., Dimopoulos, S., Villadoro, G., Mini-split (2013) J. High Energy Phys., 2, p. 126
  • Giudice, G.F., Luty, M.A., Murayama, H., Rattazzi, R., Gaugino mass without singlets (1998) J. High Energy Phys., 12
  • Randall, L., Sundrum, R., Out of this world supersymmetry breaking (1999) Nucl. Phys. B, 557, p. 79
  • Farrar, G.R., Fayet, P., Phenomenology of the production, decay, and detection of new hadronic states associated with supersymmetry (1978) Phys. Lett. B, 76, p. 575
  • Aad, G., ATLAS pixel detector electronics and sensors (2008) J. Instrum., 3
  • The ATLAS experiment at the CERN Large Hadron Collider (2008) J. Instrum., 3
  • Search for metastable heavy charged particles with large ionization energy loss in pp collisions at s=13TeV using the ATLAS experiment (2016) Phys. Rev. D, 93
  • Search for long-lived charged particles in proton–proton collisions at s=13TeV (2016) Phys. Rev. D, 94
  • Search for heavy long-lived charged R-hadrons with the ATLAS detector in 3.2fb −1 of proton–proton collision data at s=13TeV (2016) Phys. Lett. B, 760, p. 647
  • Performance of the ATLAS trigger system in 2015 (2017) Eur. Phys. J. C, 77, p. 317
  • Performance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: tracker properties (2017) J. Instrum., 12
  • Operation and performance of the ATLAS semiconductor tracker (2014) J. Instrum., 9
  • Production and integration of the ATLAS insertable B-layer (2018) J. Instrum., 13
  • Rosenfeld, A., Pfaltz, J.L., Sequential operations in digital picture processing (1966) J. Assoc. Comput. Mach., 13 (4), p. 471. , http://dl.acm.org/citation.cfm?id=321357
  • A neural network clustering algorithm for the ATLAS silicon pixel detector (2014) J. Instrum., 9
  • Mackeprang, R., Rizzi, A., Interactions of coloured heavy stable particles in matter (2007) Eur. Phys. J. C, 50, p. 353
  • Sjöstrand, T., Mrenna, S., Skands, P., PYTHIA 6.4 physics and manual (2006) J. High Energy Phys., 5
  • Further ATLAS tunes of PYTHIA 6 and PYTHIA 8 https://cds.cern.ch/record/1400677, ATL-PHYS-PUB-2011-014, 2011; Pumplin, J., New generation of parton distributions with uncertainties from global QCD analysis (2002) J. High Energy Phys., 7
  • Kraan, A.C., Interactions of heavy stable hadronizing particles (2004) Eur. Phys. J. C, 37, p. 91
  • 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., 7
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., A brief introduction to PYTHIA 8.1 (2008) Comput. Phys. Commun., 178, p. 852
  • Ball, R.D., Parton distributions with LHC data (2013) Nucl. Phys. B, 867, p. 244
  • ATLAS PYTHIA 8 tunes to 7 TeV data https://cds.cern.ch/record/1966419, ATL-PHYS-PUB-2014-021, 2014; The ATLAS simulation infrastructure (2010) Eur. Phys. J. C, 70, p. 823
  • Agostinelli, S., GEANT4: a simulation toolkit (2003) Nucl. Instrum. Methods A, 506, p. 250
  • Mackeprang, R., Milstead, D., An updated description of heavy-hadron interactions in GEANT-4 (2010) Eur. Phys. J. C, 66, p. 493
  • Beenakker, W., Hopker, R., Spira, M., Zerwas, P.M., Squark and gluino production at hadron colliders (1997) Nucl. Phys. B, 492, p. 51
  • Kulesza, A., Motyka, L., Threshold resummation for squark–antisquark and gluino-pair production at the LHC (2009) Phys. Rev. Lett., 102
  • Kulesza, A., Motyka, L., Soft gluon resummation for the production of gluino–gluino and squark–antisquark pairs at the LHC (2009) Phys. Rev. D, 80
  • Beenakker, W., Soft-gluon resummation for squark and gluino hadroproduction (2009) J. High Energy Phys., 12
  • Beenakker, W., Squark and gluino hadroproduction (2011) Int. J. Mod. Phys. A, 26, p. 2637
  • Borschensky, C., Squark and gluino production cross sections in pp collisions at s=13, 14, 33 and 100 TeV (2014) Eur. Phys. J. C, 74, p. 3174
  • Searches for heavy long-lived sleptons and R-hadrons with the ATLAS detector in pp collisions at s=7TeV (2013) Phys. Lett. B, 720, p. 277
  • Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at s=8TeV using the ATLAS experiment (2015) Eur. Phys. J. C, 75, p. 407
  • Bichsel, H., Straggling in thin silicon detectors (1988) Rev. Mod. Phys., 60, p. 663
  • Cacciari, M., Salam, G.P., Soyez, G., The anti-k t jet clustering algorithm (2008) J. High Energy Phys., 4. , http://stacks.iop.org/1126-6708/2008/i=04/a=063
  • Performance of algorithms that reconstruct missing transverse momentum in s=8TeV proton–proton collisions in the ATLAS detector (2017) Eur. Phys. J. C, 77, p. 241
  • Selection of jets produced in 13 TeV proton–proton collisions with the ATLAS detector https://cds.cern.ch/record/2037702, ATLAS-CONF-2015-029, 2015; Muon reconstruction performance of the ATLAS detector in proton–proton collision data at s=13TeV (2016) Eur. Phys. J. C, 76, p. 292
  • Performance of the ATLAS track reconstruction algorithms in dense environments in LHC Run 2 (2017) Eur. Phys. J. C, 77, p. 673
  • Acosta, D.E., Search for long-lived charged massive particles in anti-pp collisions at s=1.8TeV (2003) Phys. Rev. Lett., 90
  • Luminosity determination in pp collisions at s=8TeV using the ATLAS detector at the LHC (2016) Eur. Phys. J. C, 76, p. 653
  • HepData record for this publication https://doi.org/10.17182/hepdata.83962; Read, A.L., Presentation of search results: the CL S technique (2002) J. Phys. G, 28, p. 2693
  • Search for long-lived charginos based on a disappearing-track signature in pp collisions at s=13TeV with the ATLAS detector (2018) J. High Energy Phys., 6
  • Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in s=13TeV pp collisions with the ATLAS detector (2018) Phys. Rev. D, 97
  • ATLAS computing acknowledgements https://cds.cern.ch/record/2202407, ATL-GEN-PUB-2016-002

Citas:

---------- APA ----------
(2019) . Search for heavy charged long-lived particles in proton–proton collisions at s=13TeV using an ionisation measurement with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 788, 96-116.
http://dx.doi.org/10.1016/j.physletb.2018.10.055
---------- CHICAGO ----------
Aaboud, M. "Search for heavy charged long-lived particles in proton–proton collisions at s=13TeV using an ionisation measurement with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 788 (2019) : 96-116.
http://dx.doi.org/10.1016/j.physletb.2018.10.055
---------- MLA ----------
Aaboud, M. "Search for heavy charged long-lived particles in proton–proton collisions at s=13TeV using an ionisation measurement with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 788, 2019, pp. 96-116.
http://dx.doi.org/10.1016/j.physletb.2018.10.055
---------- VANCOUVER ----------
Aaboud, M. Search for heavy charged long-lived particles in proton–proton collisions at s=13TeV using an ionisation measurement with the ATLAS detector. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2019;788:96-116.
http://dx.doi.org/10.1016/j.physletb.2018.10.055