Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at √ s = 8 TeV
© 2016 The Author The W boson helicity fractions from top quark decays in tt‾ events are measured using data from proton–proton collisions at a centre-of-mass energy of 8TeV. The data were collected in 2012 with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.8fb−1. Even...
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| Format: | Article |
| Language: | English |
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Elsevier BV
2021
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| Online Access: | https://hdl.handle.net/1721.1/134298 |
| _version_ | 1826203075381035008 |
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| author | The CMS Collaboration |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics The CMS Collaboration |
| author_sort | The CMS Collaboration |
| collection | MIT |
| description | © 2016 The Author The W boson helicity fractions from top quark decays in tt‾ events are measured using data from proton–proton collisions at a centre-of-mass energy of 8TeV. The data were collected in 2012 with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.8fb−1. Events are reconstructed with either one muon or one electron, along with four jets in the final state, with two of the jets being identified as originating from b quarks. The measured helicity fractions from both channels are combined, yielding F0=0.681±0.012(stat)±0.023(syst), FL=0.323±0.008(stat)±0.014(syst), and FR=−0.004±0.005(stat)±0.014(syst) for the longitudinal, left-, and right-handed components of the helicity, respectively. These measurements of the W boson helicity fractions are the most accurate to date and they agree with the predictions from the standard model. |
| first_indexed | 2024-09-23T12:31:17Z |
| format | Article |
| id | mit-1721.1/134298 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:31:17Z |
| publishDate | 2021 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1342982023-01-06T16:09:42Z Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at √ s = 8 TeV The CMS Collaboration Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science © 2016 The Author The W boson helicity fractions from top quark decays in tt‾ events are measured using data from proton–proton collisions at a centre-of-mass energy of 8TeV. The data were collected in 2012 with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.8fb−1. Events are reconstructed with either one muon or one electron, along with four jets in the final state, with two of the jets being identified as originating from b quarks. The measured helicity fractions from both channels are combined, yielding F0=0.681±0.012(stat)±0.023(syst), FL=0.323±0.008(stat)±0.014(syst), and FR=−0.004±0.005(stat)±0.014(syst) for the longitudinal, left-, and right-handed components of the helicity, respectively. These measurements of the W boson helicity fractions are the most accurate to date and they agree with the predictions from the standard model. 2021-10-27T20:04:22Z 2021-10-27T20:04:22Z 2016 2019-05-13T13:36:19Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134298 Khachatryan, V., et al. "Measurement of the W Boson Helicity Fractions in the Decays of Top Quark Pairs to Lepton�+�jets Final States Produced in Pp Collisions at S=8tev." Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 762 (2016): 512-34. en 10.1016/J.PHYSLETB.2016.10.007 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier BV Elsevier |
| spellingShingle | The CMS Collaboration Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at √ s = 8 TeV |
| title | Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at √ s = 8 TeV |
| title_full | Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at √ s = 8 TeV |
| title_fullStr | Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at √ s = 8 TeV |
| title_full_unstemmed | Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at √ s = 8 TeV |
| title_short | Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at √ s = 8 TeV |
| title_sort | measurement of the w boson helicity fractions in the decays of top quark pairs to lepton jets final states produced in pp collisions at √ s 8 tev |
| url | https://hdl.handle.net/1721.1/134298 |
| work_keys_str_mv | AT thecmscollaboration measurementofthewbosonhelicityfractionsinthedecaysoftopquarkpairstoleptonjetsfinalstatesproducedinppcollisionsats8tev |