Abstract
Hitherto unobserved long-lived massive particles with electric and/or colour charge are predicted by a range of theories which extend the Standard Model. In this Letter a search is performed at the ATLAS experiment for slow-moving charged particles produced in proton-proton collisions at 7 TeV centre-of-mass energy at the LHC, using a data-set corresponding to an integrated luminosity of 34 pb{sup -1}. No deviations from Standard Model expectations are found. This result is interpreted in a framework of supersymmetry models in which coloured sparticles can hadronise into long-lived bound hadronic states, termed R-hadrons, and 95% CL limits are set on the production cross-sections of squarks and gluinos. The influence of R-hadron interactions in matter was studied using a number of different models, and lower mass limits for stable sbottoms and stops are found to be 294 and 309 GeV respectively. The lower mass limit for a stable gluino lies in the range from 562 to 586 GeV depending on the model assumed. Each of these constraints is the most stringent to date.
Aad, G;
[1]
Abbott, B;
[2]
Abdallah, J;
[3]
Abdelalim, A A;
[4]
Abdesselam, A;
[5]
Abdinov, O;
[6]
Abi, B;
[7]
Abolins, M;
[8]
Abramowicz, H;
[9]
Abreu, H;
[10]
Acerbi, E;
[11]
Dipartimento di Fisica, Universita di Milano, Milano (Italy)];
Acharya, B S;
[12]
ICTP, Trieste;
[13]
Adams, D L;
[14]
Addy, T N;
[15]
Adelman, J;
[16]
Aderholz, M;
[17]
Adomeit, S;
[18]
Adragna, P;
[19]
Adye, T;
[20]
Aefsky, S
[21]
- Fakultaet fuer Mathematik und Physik, Albert-Ludwigs-Universitaet, Freiburg i.Br. (Germany)
- Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK (United States)
- Institut de Fisica d'Altes Energies and Universitat Autonoma de Barcelona and ICREA, Barcelona (Spain)
- Section de Physique, Universite de Geneve, Geneva (Switzerland)
- Department of Physics, Oxford University, Oxford (United Kingdom)
- Institute of Physics, Azerbaijan Academy of Sciences, Baku (Azerbaijan)
- Department of Physics, Oklahoma State University, Stillwater, OK (United States)
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI (United States)
- Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv (Israel)
- LAL, Univ. Paris-Sud and CNRS/IN2P3, Orsay (France)
- INFN Sezione di Milano (Italy)
- INFN Gruppo Collegato di Udine (Italy)
- Italy
- Physics Department, Brookhaven National Laboratory, Upton, NY (United States)
- Department of Physics, Hampton University, Hampton, VA (United States)
- Department of Physics, Yale University, New Haven, CT (United States)
- Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), Muenchen (Germany)
- Fakultaet fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, Muenchen (Germany)
- Department of Physics, Queen Mary University of London, London (United Kingdom)
- Particle Physics Department, Rutherford Appleton Laboratory, Didcot (United Kingdom)
- Department of Physics, Brandeis University, Waltham, MA (United States)
Citation Formats
Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, and Aefsky, S.
Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC.
Netherlands: N. p.,
2011.
Web.
doi:10.1016/j.physletb.2011.05.010.
Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, & Aefsky, S.
Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC.
Netherlands.
https://doi.org/10.1016/j.physletb.2011.05.010
Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, and Aefsky, S.
2011.
"Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC."
Netherlands.
https://doi.org/10.1016/j.physletb.2011.05.010.
@misc{etde_21579355,
title = {Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC}
author = {Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, and Aefsky, S}
abstractNote = {Hitherto unobserved long-lived massive particles with electric and/or colour charge are predicted by a range of theories which extend the Standard Model. In this Letter a search is performed at the ATLAS experiment for slow-moving charged particles produced in proton-proton collisions at 7 TeV centre-of-mass energy at the LHC, using a data-set corresponding to an integrated luminosity of 34 pb{sup -1}. No deviations from Standard Model expectations are found. This result is interpreted in a framework of supersymmetry models in which coloured sparticles can hadronise into long-lived bound hadronic states, termed R-hadrons, and 95% CL limits are set on the production cross-sections of squarks and gluinos. The influence of R-hadron interactions in matter was studied using a number of different models, and lower mass limits for stable sbottoms and stops are found to be 294 and 309 GeV respectively. The lower mass limit for a stable gluino lies in the range from 562 to 586 GeV depending on the model assumed. Each of these constraints is the most stringent to date.}
doi = {10.1016/j.physletb.2011.05.010}
journal = []
issue = {1}
volume = {701}
place = {Netherlands}
year = {2011}
month = {Jun}
}
title = {Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC}
author = {Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, and Aefsky, S}
abstractNote = {Hitherto unobserved long-lived massive particles with electric and/or colour charge are predicted by a range of theories which extend the Standard Model. In this Letter a search is performed at the ATLAS experiment for slow-moving charged particles produced in proton-proton collisions at 7 TeV centre-of-mass energy at the LHC, using a data-set corresponding to an integrated luminosity of 34 pb{sup -1}. No deviations from Standard Model expectations are found. This result is interpreted in a framework of supersymmetry models in which coloured sparticles can hadronise into long-lived bound hadronic states, termed R-hadrons, and 95% CL limits are set on the production cross-sections of squarks and gluinos. The influence of R-hadron interactions in matter was studied using a number of different models, and lower mass limits for stable sbottoms and stops are found to be 294 and 309 GeV respectively. The lower mass limit for a stable gluino lies in the range from 562 to 586 GeV depending on the model assumed. Each of these constraints is the most stringent to date.}
doi = {10.1016/j.physletb.2011.05.010}
journal = []
issue = {1}
volume = {701}
place = {Netherlands}
year = {2011}
month = {Jun}
}