Direct top-quark width measurement at CDF
We present a measurement of the top-quark width in the lepton+jets decay channel of tt̄ events produced in pp̄ collisions at Fermilab's Tevatron collider and collected by the CDF II detector. From a data sample corresponding to 4.3fb⊃-1 of integrated luminosity, we identify 756 candidate events...
| Päätekijät: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Aineistotyyppi: | Journal article |
| Kieli: | English |
| Julkaistu: |
2010
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| _version_ | 1826270961477877760 |
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| author | Aaltonen, T Álvarez González, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Apresyan, A Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bauer, G |
| author_facet | Aaltonen, T Álvarez González, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Apresyan, A Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bauer, G |
| author_sort | Aaltonen, T |
| collection | OXFORD |
| description | We present a measurement of the top-quark width in the lepton+jets decay channel of tt̄ events produced in pp̄ collisions at Fermilab's Tevatron collider and collected by the CDF II detector. From a data sample corresponding to 4.3fb⊃-1 of integrated luminosity, we identify 756 candidate events. The top-quark mass and the mass of the hadronically decaying W boson that comes from the top-quark decay are reconstructed for each event and compared with templates of different top-quark widths (Γt) and deviations from nominal jet energy scale (ΔJES) to perform a simultaneous fit for both parameters, where ΔJES is used for the in situ calibration of the jet energy scale. By applying a Feldman-Cousins approach, we establish an upper limit at 95% confidence level (CL) of Γt<7.6GeV and a two-sided 68% CL interval of 0.3GeV<Γt<4.4GeV for a top-quark mass of 172.5GeV/c2, which are consistent with the standard model prediction. © 2010 The American Physical Society. |
| first_indexed | 2024-03-06T21:49:06Z |
| format | Journal article |
| id | oxford-uuid:4aa319db-53ef-4704-9e53-4eeefe41186f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:49:06Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:4aa319db-53ef-4704-9e53-4eeefe41186f2022-03-26T15:38:49ZDirect top-quark width measurement at CDFJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4aa319db-53ef-4704-9e53-4eeefe41186fEnglishSymplectic Elements at Oxford2010Aaltonen, TÁlvarez González, BAmerio, SAmidei, DAnastassov, AAnnovi, AAntos, JApollinari, GAppel, JApresyan, AArisawa, TArtikov, AAsaadi, JAshmanskas, WAuerbach, BAurisano, AAzfar, FBadgett, WBarbaro-Galtieri, ABarnes, VBarnett, BBarria, PBartos, PBauce, MBauer, GWe present a measurement of the top-quark width in the lepton+jets decay channel of tt̄ events produced in pp̄ collisions at Fermilab's Tevatron collider and collected by the CDF II detector. From a data sample corresponding to 4.3fb⊃-1 of integrated luminosity, we identify 756 candidate events. The top-quark mass and the mass of the hadronically decaying W boson that comes from the top-quark decay are reconstructed for each event and compared with templates of different top-quark widths (Γt) and deviations from nominal jet energy scale (ΔJES) to perform a simultaneous fit for both parameters, where ΔJES is used for the in situ calibration of the jet energy scale. By applying a Feldman-Cousins approach, we establish an upper limit at 95% confidence level (CL) of Γt<7.6GeV and a two-sided 68% CL interval of 0.3GeV<Γt<4.4GeV for a top-quark mass of 172.5GeV/c2, which are consistent with the standard model prediction. © 2010 The American Physical Society. |
| spellingShingle | Aaltonen, T Álvarez González, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Apresyan, A Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bauer, G Direct top-quark width measurement at CDF |
| title | Direct top-quark width measurement at CDF |
| title_full | Direct top-quark width measurement at CDF |
| title_fullStr | Direct top-quark width measurement at CDF |
| title_full_unstemmed | Direct top-quark width measurement at CDF |
| title_short | Direct top-quark width measurement at CDF |
| title_sort | direct top quark width measurement at cdf |
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