4 research outputs found
Search for heavy long-lived charged particles in pp collisions at âs = 7 TeV
The result of a search for heavy long-lived charged particles produced in pp collisions at âs = 7 TeV at the LHC is described. The data sample has been collected using the CMS detector and corresponds to an integrated luminosity of 5.0 fbâ1. The inner tracking detectors are used to define a sample of events containing tracks with high momentum and high ionization energy loss. A second sample of events, which have high-momentum tracks satisfying muon identification requirements in addition to meeting high-ionization and long time-of-flight requirements, is analyzed independently. In both cases, the results are consistent with the expected background estimated from data. The results are used to establish cross section limits as a function of mass within the context of models with long-lived gluinos, scalar top quarks and scalar taus. Cross section limits on hyper-meson particles, containing new elementary longlived hyper-quarks predicted by a vector-like confinement model, are also presented. Lower limits at 95% confidence level on the mass of gluinos (scalar top quarks) are found to be 1098 (737) GeV/c2. A limit of 928 (626) GeV/c2 is set for a gluino (scalar top quark) that hadronizes into a neutral bound state before reaching the muon detectors. The lower mass limit for a pair produced scalar tau is found to be 223 GeV/c2. Mass limits for a hyper-kaon are placed at 484, 602, and 747 GeV/c2 for hyper-Ï masses of 800, 1200, and 1600 GeV/c2, respectively.We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council (European Union); the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation Ă la Recherche dans lâIndustrie et dans lâAgriculture (FRIA â Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT â Belgium); the Council of Science and Industrial Research, India; and the HOMING PLUS programme of Foundation for Polish Science, cofinanced from European Union, Regional Development Fund
Search for heavy long-lived charged particles in collisions at TeV
The result of a search for heavy long-lived charged particles produced in pp collisions at sqrt(s) = 7 TeV at the LHC is described. The data sample has been collected using the CMS detector and corresponds to an integrated luminosity of 5.0 inverse femtobarns. The inner tracking detectors are used to define a sample of events containing tracks with high momentum and high ionization energy loss. A second sample of events with high-momentum and high-ionization tracks satisfying muon identification and long time-of-flight criteria is analyzed independently. In both cases, the results are consistent with the expected background estimated from data. The results are used to establish cross section limits as a function of mass within the context of models with long-lived gluinos, scalar top quarks and scalar taus. Cross section limits on hyper-meson particles, containing new elementary long-lived hyper-quarks predicted by a vector-like confinement model, are also presented. Lower limits at 95% confidence level on the mass of gluinos (scalar top quarks) are found to be 1098 (737) GeV. A limit of 928 (626) GeV is set for a gluino (scalar top quark) that hadronizes into a neutral bound state before reaching the muon detectors. The lower mass limit for a pair produced scalar tau is found to be 223 GeV. Mass limits for a hyper-kaon are placed at 484, 602, and 747 GeV for hyper-rho masses of 800, 1200, and 1600 GeV, respectively.Peer Reviewe
Search for heavy long-lived charged particles in pp collisions at âs=7 TeV
The result of a search for heavy long-lived charged particles produced in pp collisions at âs=7 TeV at the LHC is described. The data sample has been collected using the CMS detector and corresponds to an integrated luminosity of 5.0 fb-1. The inner tracking detectors are used to define a sample of events containing tracks with high momentum and high ionization energy loss. A second sample of events, which have high-momentum tracks satisfying muon identification requirements in addition to meeting high-ionization and long time-of-flight requirements, is analyzed independently. In both cases, the results are consistent with the expected background estimated from data. The results are used to establish cross section limits as a function of mass within the context of models with long-lived gluinos, scalar top quarks and scalar taus. Cross section limits on hyper-meson particles, containing new elementary long-lived hyper-quarks predicted by a vector-like confinement model, are also presented. Lower limits at 95% confidence level on the mass of gluinos (scalar top quarks) are found to be 1098 (737) GeV/c2. A limit of 928 (626) GeV/c2 is set for a gluino (scalar top quark) that hadronizes into a neutral bound state before reaching the muon detectors. The lower mass limit for a pair produced scalar tau is found to be 223 GeV/c2. Mass limits for a hyper-kaon are placed at 484, 602, and 747 GeV/c2 for hyper-Ï masses of 800, 1200, and 1600 GeV/c2, respectively.0CMS Collaborationinfo:eu-repo/semantics/publishe
Search for heavy long-lived charged particles in pp collisions at TeV
The result of a search for heavy long-lived charged particles produced in pp
collisions at sqrt(s) = 7 TeV at the LHC is described. The data sample has been
collected using the CMS detector and corresponds to an integrated luminosity of
5.0 inverse femtobarns. The inner tracking detectors are used to define a
sample of events containing tracks with high momentum and high ionization
energy loss. A second sample of events with high-momentum and high-ionization
tracks satisfying muon identification and long time-of-flight criteria is
analyzed independently. In both cases, the results are consistent with the
expected background estimated from data. The results are used to establish
cross section limits as a function of mass within the context of models with
long-lived gluinos, scalar top quarks and scalar taus. Cross section limits on
hyper-meson particles, containing new elementary long-lived hyper-quarks
predicted by a vector-like confinement model, are also presented. Lower limits
at 95% confidence level on the mass of gluinos (scalar top quarks) are found to
be 1098 (737) GeV. A limit of 928 (626) GeV is set for a gluino (scalar top
quark) that hadronizes into a neutral bound state before reaching the muon
detectors. The lower mass limit for a pair produced scalar tau is found to be
223 GeV. Mass limits for a hyper-kaon are placed at 484, 602, and 747 GeV for
hyper-rho masses of 800, 1200, and 1600 GeV, respectively.Comment: Submitted to Physics Letters