Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector
A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed wit...
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2014
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| Online Access: | http://hdl.handle.net/1721.1/89429 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1811093220208148480 |
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| author | Taylor, Frank E. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. |
| author_sort | Taylor, Frank E. |
| collection | MIT |
| description | A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at √s = 8\ TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb[superscript −1]. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state ([~ over t][subscript 2]) followed by the decay to the lighter top squark state ([~ over t][subscript 1]) via [~ over t][subscript 2] →Z[~ over t][subscript 1], and for [~ over t][subscript 1] pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino ([~ over X[0 over 1]) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino ([~ over G]) via the [~ over X[0 over 1] → Z[~ over G] process. |
| first_indexed | 2024-09-23T15:41:34Z |
| format | Article |
| id | mit-1721.1/89429 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:41:34Z |
| publishDate | 2014 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/894292022-10-02T03:29:16Z Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector Taylor, Frank E. Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at √s = 8\ TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb[superscript −1]. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state ([~ over t][subscript 2]) followed by the decay to the lighter top squark state ([~ over t][subscript 1]) via [~ over t][subscript 2] →Z[~ over t][subscript 1], and for [~ over t][subscript 1] pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino ([~ over X[0 over 1]) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino ([~ over G]) via the [~ over X[0 over 1] → Z[~ over G] process. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2014-09-11T13:51:02Z 2014-09-11T13:51:02Z 2014-06 2014-03 Article http://purl.org/eprint/type/JournalArticle 1434-6044 1434-6052 http://hdl.handle.net/1721.1/89429 Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector.” Eur. Phys. J. C 74, no. 6 (June 2014). © CERN for the benefit of the ATLAS collaboration https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1140/epjc/s10052-014-2883-6 The European Physical Journal C Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer-Verlag |
| spellingShingle | Taylor, Frank E. Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector |
| title | Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector |
| title_full | Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector |
| title_fullStr | Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector |
| title_full_unstemmed | Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector |
| title_short | Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector |
| title_sort | search for direct top squark pair production in events with a z boson b jets and missing transverse momentum in √s 8 tev pp collisions with the atlas detector |
| url | http://hdl.handle.net/1721.1/89429 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke searchfordirecttopsquarkpairproductionineventswithazbosonbjetsandmissingtransversemomentumins8tevppcollisionswiththeatlasdetector |