Measurement of the Mass Difference between t and [overline t] Quarks
We present a direct measurement of the mass difference between t and t̄ quarks using tt̄ candidate events in the lepton+jets channel, collected with the CDFII detector at Fermilab's 1.96 TeV Tevatron pp̄ Collider. We make an event by event estimate of the mass difference to construct templates...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Published: |
American Physical Society (APS)
2018
|
| Online Access: | http://hdl.handle.net/1721.1/116674 https://orcid.org/0000-0002-6047-4211 |
| _version_ | 1826197260351832064 |
|---|---|
| author | CDF Collaboration Bauer, Gerry P Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. |
| author2 | Massachusetts Institute of Technology. Laboratory for Nuclear Science |
| author_facet | Massachusetts Institute of Technology. Laboratory for Nuclear Science CDF Collaboration Bauer, Gerry P Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. |
| author_sort | CDF Collaboration |
| collection | MIT |
| description | We present a direct measurement of the mass difference between t and t̄ quarks using tt̄ candidate events in the lepton+jets channel, collected with the CDFII detector at Fermilab's 1.96 TeV Tevatron pp̄ Collider. We make an event by event estimate of the mass difference to construct templates for top quark pair signal events and background events. The resulting mass difference distribution of data is compared to templates of signals and background using a maximum likelihood fit. From a sample corresponding to an integrated luminosity of 5.6fb ⁻¹, we measure a mass difference, ΔM top =M t -M t̄ =-3.3±1.4(stat) ±1.0(syst)GeV/c², approximately 2standard deviations away from the CPT hypothesis of zero mass difference. |
| first_indexed | 2024-09-23T10:44:58Z |
| format | Article |
| id | mit-1721.1/116674 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:44:58Z |
| publishDate | 2018 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1166742022-09-27T14:43:25Z Measurement of the Mass Difference between t and [overline t] Quarks CDF Collaboration Bauer, Gerry P Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. Massachusetts Institute of Technology. Laboratory for Nuclear Science Bauer, Gerry P Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. We present a direct measurement of the mass difference between t and t̄ quarks using tt̄ candidate events in the lepton+jets channel, collected with the CDFII detector at Fermilab's 1.96 TeV Tevatron pp̄ Collider. We make an event by event estimate of the mass difference to construct templates for top quark pair signal events and background events. The resulting mass difference distribution of data is compared to templates of signals and background using a maximum likelihood fit. From a sample corresponding to an integrated luminosity of 5.6fb ⁻¹, we measure a mass difference, ΔM top =M t -M t̄ =-3.3±1.4(stat) ±1.0(syst)GeV/c², approximately 2standard deviations away from the CPT hypothesis of zero mass difference. 2018-06-28T16:38:25Z 2018-06-28T16:38:25Z 2011-04 2011-03 2018-06-19T18:21:46Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/116674 Aaltonen, T. et al. “Measurement of the Mass Difference betweentandt¯Quarks.” Physical Review Letters 106, 15 (April 2011): 152001 © 2011 American Physical Society https://orcid.org/0000-0002-6047-4211 http://dx.doi.org/10.1103/PhysRevLett.106.152001 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | CDF Collaboration Bauer, Gerry P Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. Measurement of the Mass Difference between t and [overline t] Quarks |
| title | Measurement of the Mass Difference between t and [overline t] Quarks |
| title_full | Measurement of the Mass Difference between t and [overline t] Quarks |
| title_fullStr | Measurement of the Mass Difference between t and [overline t] Quarks |
| title_full_unstemmed | Measurement of the Mass Difference between t and [overline t] Quarks |
| title_short | Measurement of the Mass Difference between t and [overline t] Quarks |
| title_sort | measurement of the mass difference between t and overline t quarks |
| url | http://hdl.handle.net/1721.1/116674 https://orcid.org/0000-0002-6047-4211 |
| work_keys_str_mv | AT cdfcollaboration measurementofthemassdifferencebetweentandoverlinetquarks AT bauergerryp measurementofthemassdifferencebetweentandoverlinetquarks AT gomezceballosguillelmo measurementofthemassdifferencebetweentandoverlinetquarks AT goncharovmaxim measurementofthemassdifferencebetweentandoverlinetquarks AT makhoulkhaldoun measurementofthemassdifferencebetweentandoverlinetquarks AT pauschristophme measurementofthemassdifferencebetweentandoverlinetquarks |