Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state
A search is presented for a massive particle, generically referred to as a Z', decaying into a tt̄ pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged...
| Główni autorzy: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Wydane: |
2012
|
| _version_ | 1826294413752532992 |
|---|---|
| author | Chatrchyan, S Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Eroe, J Fabjan, C Friedl, M Fruehwirth, R Ghete, V Hammer, J Hoermann, N Hrubec, J Jeitler, M Kiesenhofer, W Krammer, M Liko, D Mikulec, I Pernicka, M Rahbaran, B Rohringer, C Rohringer, H Schoefbeck, R |
| author_facet | Chatrchyan, S Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Eroe, J Fabjan, C Friedl, M Fruehwirth, R Ghete, V Hammer, J Hoermann, N Hrubec, J Jeitler, M Kiesenhofer, W Krammer, M Liko, D Mikulec, I Pernicka, M Rahbaran, B Rohringer, C Rohringer, H Schoefbeck, R |
| author_sort | Chatrchyan, S |
| collection | OXFORD |
| description | A search is presented for a massive particle, generically referred to as a Z', decaying into a tt̄ pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 fb -1. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, the result contrain any enhancement in tt̄ production beyond expectations of the standard mode for tt invariant mass larger than 1TeV/c 2. |
| first_indexed | 2024-03-07T03:45:15Z |
| format | Journal article |
| id | oxford-uuid:bf3f863d-b40d-4040-b93c-6aabd49f32b7 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:45:15Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:bf3f863d-b40d-4040-b93c-6aabd49f32b72022-03-27T05:46:06ZSearch for anomalous t(t)over-bar production in the highly-boosted all-hadronic final stateJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:bf3f863d-b40d-4040-b93c-6aabd49f32b7Symplectic Elements at Oxford2012Chatrchyan, SKhachatryan, VSirunyan, ATumasyan, AAdam, WBergauer, TDragicevic, MEroe, JFabjan, CFriedl, MFruehwirth, RGhete, VHammer, JHoermann, NHrubec, JJeitler, MKiesenhofer, WKrammer, MLiko, DMikulec, IPernicka, MRahbaran, BRohringer, CRohringer, HSchoefbeck, RA search is presented for a massive particle, generically referred to as a Z', decaying into a tt̄ pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 fb -1. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, the result contrain any enhancement in tt̄ production beyond expectations of the standard mode for tt invariant mass larger than 1TeV/c 2. |
| spellingShingle | Chatrchyan, S Khachatryan, V Sirunyan, A Tumasyan, A Adam, W Bergauer, T Dragicevic, M Eroe, J Fabjan, C Friedl, M Fruehwirth, R Ghete, V Hammer, J Hoermann, N Hrubec, J Jeitler, M Kiesenhofer, W Krammer, M Liko, D Mikulec, I Pernicka, M Rahbaran, B Rohringer, C Rohringer, H Schoefbeck, R Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state |
| title | Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state |
| title_full | Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state |
| title_fullStr | Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state |
| title_full_unstemmed | Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state |
| title_short | Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state |
| title_sort | search for anomalous t t over bar production in the highly boosted all hadronic final state |
| work_keys_str_mv | AT chatrchyans searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT khachatryanv searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT sirunyana searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT tumasyana searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT adamw searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT bergauert searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT dragicevicm searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT eroej searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT fabjanc searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT friedlm searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT fruehwirthr searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT ghetev searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT hammerj searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT hoermannn searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT hrubecj searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT jeitlerm searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT kiesenhoferw searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT krammerm searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT likod searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT mikuleci searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT pernickam searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT rahbaranb searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT rohringerc searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT rohringerh searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate AT schoefbeckr searchforanomalousttoverbarproductioninthehighlyboostedallhadronicfinalstate |