Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at s√ = 8 TeV
| dc.contributor.author | Aad, G. | |
| dc.contributor.author | Abbott, B. | |
| dc.contributor.author | Abbott, D.C. | |
| dc.contributor.author | Abed Abud, A. | |
| dc.contributor.author | Abeling, K. | |
| dc.contributor.author | Abhayasinghe, D.K. | |
| dc.contributor.author | Abidi, S.H. | |
| dc.contributor.author | AbouZeid, O.S. | |
| dc.contributor.author | Abraham, N.L. | |
| dc.contributor.author | Abramowicz, H. | |
| dc.contributor.author | Albert, Justin | |
| dc.contributor.author | Anelli, Christopher R. | |
| dc.contributor.author | Carlson, Evan Michael | |
| dc.contributor.author | Chiu, Y. H. | |
| dc.contributor.author | Ghasemi Bostanabad, M. | |
| dc.contributor.author | Hamano, Kenji | |
| dc.contributor.author | Kay, E. F. | |
| dc.contributor.author | Keeler, Richard | |
| dc.contributor.author | Kowalewski, Robert | |
| dc.contributor.author | Lefebvre, Michel | |
| dc.contributor.author | et al. | |
| dc.date.accessioned | 2021-01-26T18:24:25Z | |
| dc.date.available | 2021-01-26T18:24:25Z | |
| dc.date.copyright | 2020 | en_US |
| dc.date.issued | 2020 | |
| dc.description.abstract | The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of about 20 fb−1 for each experiment. The measurements used events containing one lepton and having different jet multiplicities in the final state. The results are quoted as fractions of W bosons with longitudinal (F0), left-handed (FL), or right-handed (FR) polarizations. The resulting combined measurements of the polarization fractions are F0 = 0.693 ± 0.014 and FL = 0.315 ± 0.011. The fraction FR is calculated from the unitarity constraint to be FR = −0.008 ± 0.007. These results are in agreement with the standard model predictions at next-to-next-to-leading order in perturbative quantum chromodynamics and represent an improvement in precision of 25 (29)% for F0 (FL) with respect to the most precise single measurement. A limit on anomalous right-handed vector (VR), and left- and right-handed tensor (gL, gR) tWb couplings is set while fixing all others to their standard model values. The allowed regions are [−0.11, 0.16] for VR, [−0.08, 0.05] for gL, and [−0.04, 0.02] for gR, at 95% confidence level. Limits on the corresponding Wilson coefficients are also derived. | en_US |
| dc.description.reviewstatus | Reviewed | en_US |
| dc.description.scholarlevel | Faculty | en_US |
| dc.description.sponsorship | We acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador); MoER, ERC IUT, PUT and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR, and NRC KI (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI, and FEDER (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (U.S.A.). | en_US |
| dc.identifier.citation | Aad, G., Abbott, B., Abbott, D. C., Abed Abud, A., Abeling, K., Abhayasinghe, D. K., … Zwalinski, L. (2020). Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at s√s = 8 TeV. Journal of High Energy Physics, 2020(8). https://doi.org/10.1007/JHEP08(2020)051 | en_US |
| dc.identifier.uri | https://doi.org/10.1007/JHEP08(2020)051 | |
| dc.identifier.uri | http://hdl.handle.net/1828/12594 | |
| dc.language.iso | en | en_US |
| dc.publisher | Journal of High Energy Physics | en_US |
| dc.subject | Hadron-Hadron scattering (experiments) | |
| dc.subject | Top physics | |
| dc.subject.department | Department of Physics and Astronomy | |
| dc.title | Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at s√ = 8 TeV | en_US |
| dc.type | Article | en_US |