Publications [#374216] of Ashutosh V. Kotwal

Papers Published
  1. Aad, G; Abbott, B; Abbott, DC; Abeling, K; Abidi, SH; Aboulhorma, A; Abramowicz, H; Abreu, H; Abulaiti, Y; Hoffman, ACA; Acharya, BS; Achkar, B; Bourdarios, CA; Adamczyk, L; Adamek, L; Addepalli, SV; Adelman, J; Adiguzel, A; Adorni, S; Adye, T; Affolder, AA; Afik, Y; Agaras, MN; Agarwala, J; Aggarwal, A; Agheorghiesei, C; Aguilar-Saavedra, JA; Ahmad, A; Ahmadov, F; Ahmed, WS; Ahuja, S; Ai, X; Aielli, G; Aizenberg, I; Akbiyik, M; Åkesson, TPA; Akimov, AV; Khoury, KA; Alberghi, GL; Albert, J; Albicocco, P; Verzini, MJA; Alderweireldt, S; Aleksa, M; Aleksandrov, IN; Alexa, C; Alexopoulos, T; Alfonsi, A; Alfonsi, F; Alhroob, M; Ali, B; Ali, S; Aliev, M; Alimonti, G; Alkakhi, W; Allaire, C; Allbrooke, BMM; Allport, PP; Aloisio, A; Alonso, F; Alpigiani, C; Camelia, EA; Estevez, MA; Alviggi, MG; Coutinho, YA; Ambler, A; Amelung, C; Ames, CG; Amidei, D; Santos, SPAD; Amoroso, S; Amos, KR; Amrouche, CS; Ananiev, V; Anastopoulos, C; Andeen, T; Anders, JK; Andrean, SY; Andreazza, A; Angelidakis, S; Angerami, A; Anisenkov, AV; Annovi, A; Antel, C; Anthony, MT; Antipov, E; Antonelli, M; Antrim, DJA; Anulli, F; Aoki, M; Aoki, T; Pozo, JAA; Aparo, MA; Bella, LA; Appelt, C; Aranzabal, N; Ferraz, VA; Arcangeletti, C; Arce, ATH; Arena, E, Measurement of the CP properties of Higgs boson interactions with τ -leptons with the ATLAS detector, European Physical Journal C, vol. 83 no. 7 (July, 2023), Springer Science and Business Media LLC [doi] .

    Abstract:
    A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and τ -leptons is presented. The study is based on a measurement of CP -sensitive angular observables defined by the visible decay products of τ -leptons produced in Higgs boson decays. The analysis uses 139 fb- 1of proton–proton collision data recorded at a centre-of-mass energy of s=13 TeV with the ATLAS detector at the Large Hadron Collider. Contributions from CP -violating interactions between the Higgs boson and τ -leptons are described by a single mixing angle parameter ϕτin the generalised Yukawa interaction. Without constraining the H→ ττ signal strength to its expected value under the Standard Model hypothesis, the mixing angle ϕτis measured to be 9∘± 16∘, with an expected value of 0∘± 28∘at the 68% confidence level. The pure CP -odd hypothesis is disfavoured at a level of 3.4 standard deviations. The results are compatible with the predictions for the Higgs boson in the Standard Model.

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