[논문]Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at <tex> <tex>$$ </tex> \\sqrt{s}<tex>$$ </tex></tex> = 8 TeV

Aad, G.; Abbott, B.; Abbott, D. C.; Abed Abud, A.; Abeling, K.; Abhayasinghe, D. K.; Abidi, S. H.; Abou Zeid, O. S.; Abraham, N. L.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Achkar, B.; Adam, L.; Adam Bourdarios, C.; Adamczyk, L.; Adamek, L.; Adelman, J.; Adersberger, M.; Adiguzel, A.; Adorni, S.; Adye, T.; Affolder, A. A.; Afik, Y.; Agapopoulou, C.; Agaras, M. N.; Aggarwal, A.; Agheorghiesei, C.; Aguilar-Saavedra, J. A.; Ahmad, A.; Ahmadov, F.; Ahmed, W. S.; Ai, X.; Aielli, G.; Akatsuka, S.; Å; kesson, T. P. A.; Akilli, E.; Akimov, A. V.; AlKhoury, K.; Alberghi, G. L.; Albert, J.; Alconada Verzini, M. J.; Alderweireldt, S.; Aleksa, M.; Aleksandrov, I. N.; Alexa, C.; Alexopoulos, T.; Alfonsi, A.; Alfonsi, F.; Alhroob, M.; Ali, B.; Ali, S.; Aliev, M.; Alimonti, G.; Allaire, C.; Allbrooke, B. M. M.; Allen, B. W.; Allport, P.P.; Aloisio, A.; Alonso, F.; Alpigiani, C.; Alshehri, A. A.; Alunno Camelia, E.; A

doi:10.1007/jhep08(2020)051

[해외논문] Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at $$ \\sqrt{s}$$ = 8 TeV 원문보기

Journal of high energy physics : JHEP, v.2020 no.8, 2020년, pp.51 -

Aad, G. , Abbott, B. , Abbott, D. C. , Abed Abud, A. , Abeling, K. , Abhayasinghe, D. K. , Abidi, S. H. , Abou Zeid, O. S. , Abraham, N. L. , Abramowicz, H. , Abreu, H. , Abulaiti, Y. , Acharya, B. S. , Achkar, B. , Adam, L. , Adam Bourdarios, C. , Adamczyk, L. , Adamek, L. , Adelman, J. , Adersberger, M. , Adiguzel, A. , Adorni, S. , Adye, T. , Affolder, A. A. , Afik, Y. , Agapopoulou, C. , Agaras, M. N. , Aggarwal, A. , Agheorghiesei, C. , Aguilar-Saavedra, J. A. , Ahmad, A. , Ahmadov, F. , Ahmed, W. S. , Ai, X. , Aielli, G. , Akatsuka, S. , Åkesson, T. P. A. , Akilli, E. , Akimov, A. V. , AlKhoury, K. , Alberghi, G. L. , Albert, J. , Alconada Verzini, M. J. , Alderweireldt, S. , Aleksa, M. , Aleksandrov, I. N. , Alexa, C. , Alexopoulos, T. , Alfonsi, A. , Alfonsi, F. , Alhroob, M. , Ali, B. , Ali, S. , Aliev, M. , Alimonti, G. , Allaire, C. , Allbrooke, B. M. M. , Allen, B. W. , Allport, P.P. , Aloisio, A. , Alonso, F. , Alpigiani, C. , Alshehri, A. A. , Alunno Camelia, E. , A

Abstract ▼ AI-Helper

AbstractThe 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.

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