Now showing 1 - 2 of 2
  • Publication
    Erratum to: Search for exclusive Higgs and Z boson decays to ϕγ and ργ with the ATLAS detector (Journal of High Energy Physics, (2018), 2018, 7, (127), 10.1007/JHEP07(2018)127)
    (2023-12-01)
    Aaboud, M.
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    Aad, G.
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    Abbott, B.
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    Abdinov, O.
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    Abeloos, B.
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    Abidi, S. H.
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    AbouZeid, O. S.
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    Abraham, N. L.
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    Abramowicz, H.
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    Abreu, H.
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    Abreu, R.
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    Abulaiti, Y.
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    Acharya, B. S.
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    Adachi, S.
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    Adamczyk, L.
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    Adelman, J.
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    Adersberger, M.
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    Adye, T.
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    Affolder, A. A.
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    Afik, Y.
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    Agatonovic-Jovin, T.
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    Agheorghiesei, C.
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    Aguilar-Saavedra, J. A.
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    Ahlen, S. P.
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    Ahmadov, F.
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    Aielli, G.
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    Akatsuka, S.
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    Akerstedt, H.
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    Åkesson, T. P.A.
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    Akilli, E.
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    Akimov, A. V.
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    Alberghi, G. L.
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    Albert, J.
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    Albicocco, P.
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    Alconada Verzini, M. J.
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    Alderweireldt, S. C.
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    Aleksa, M.
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    Aleksandrov, I. N.
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    Alexa, C.
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    Alexander, G.
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    Alexopoulos, T.
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    Alhroob, M.
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    Ali, B.
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    Aliev, M.
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    Alimonti, G.
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    Alison, J.
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    Alkire, S. P.
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    Allbrooke, B. M.M.
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    Allen, B. W.
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    Allport, P. P.
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    Aloisio, A.
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    Alonso, A.
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    Alonso, F.
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    Alpigiani, C.
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    Alshehri, A. A.
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    Alstaty, M. I.
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    Alvarez Gonzalez, B.
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    Álvarez Piqueras, D.
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    Alviggi, M. G.
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    Amadio, B. T.
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    Amaral Coutinho, Y.
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    Amelung, C.
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    Amidei, D.
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    Amor Dos Santos, S. P.
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    Amoroso, S.
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    Amundsen, G.
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    Anastopoulos, C.
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    Ancu, L. S.
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    Andari, N.
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    Andeen, T.
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    Anders, C. F.
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    Anders, J. K.
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    Anderson, K. J.
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    Andreazza, A.
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    Andrei, V.
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    Angelidakis, S.
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    Angelozzi, I.
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    Angerami, A.
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    Anisenkov, A. V.
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    Anjos, N.
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    Annovi, A.
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    Antel, C.
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    Antonelli, M.
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    Antonov, A.
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    Antrim, D. J.
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    Anulli, F.
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    Aoki, M.
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    Aperio Bella, L.
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    Arabidze, G.
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    Arai, Y.
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    Araque, J. P.
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    Araujo Ferraz, V.
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    Arce, A. T.H.
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    Ardell, R. E.
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    Arduh, F. A.
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    Arguin, J. F.
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    Argyropoulos, S.
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    Arik, M.
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    N. Viaux Maira
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    G.A. Vasquez
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    Kuleshov, S
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    Lopez, J. A.
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    Prokoshin, F.
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    Javier Salazar Loyola
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    Tapia Araya, S.
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    A search for the exclusive decays of the Higgs and Z bosons to a ϕ or ρ meson and a photon is performed with a pp collision data sample corresponding to an integrated luminosity of up to 35.6 fb−1 collected at s√=13 TeV with the ATLAS detector at the CERN Large Hadron Collider. These decays have been suggested as a probe of the Higgs boson couplings to light quarks. No significant excess of events is observed above the background, as expected from the Standard Model. Upper limits at 95% confidence level were obtained on the branching fractions of the Higgs boson decays to ϕγ and ργ of 5.0×10−4 and 10.4×10−4, respectively. The corresponding 95% confidence level upper limits for the Z boson decays are 0.7×10−6 and 4.0×10−6 for ϕγ and ργ, respectively.
  • Publication
    Measurement of t-channel single-top-quark production in pp collisions at s=5.02 TeV with the ATLAS detector
    (2024-07-01)
    Aad, G.
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    Abbott, B.
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    Abeling, K.
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    Abicht, N. J.
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    Abidi, S. H.
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    Aboulhorma, A.
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    Abramowicz, H.
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    Abreu, H.
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    Abulaiti, Y.
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    Acharya, B. S.
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    Adam Bourdarios, C.
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    Adamczyk, L.
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    Adamek, L.
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    Addepalli, S. V.
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    Addison, M. J.
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    Adelman, J.
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    Adiguzel, A.
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    Adye, T.
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    Affolder, A. A.
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    Afik, Y.
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    Agaras, M. N.
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    Agarwala, J.
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    Aggarwal, A.
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    Agheorghiesei, C.
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    Ahmad, A.
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    Ahmadov, F.
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    Ahmed, W. S.
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    Ahuja, S.
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    Ai, X.
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    Aielli, G.
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    Aikot, A.
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    Ait Tamlihat, M.
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    Aitbenchikh, B.
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    Aizenberg, I.
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    Akbiyik, M.
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    Åkesson, T. P.A.
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    Akimov, A. V.
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    Akiyama, D.
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    Akolkar, N. N.
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    Al Khoury, K.
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    Alberghi, G. L.
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    Albert, J.
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    Albicocco, P.
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    Albouy, G. L.
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    Alderweireldt, S.
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    Aleksa, M.
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    Aleksandrov, I. N.
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    Alexa, C.
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    Alexopoulos, T.
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    Alfonsi, F.
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    Algren, M.
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    Alhroob, M.
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    Ali, B.
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    Ali, H. M.J.
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    Ali, S.
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    Alibocus, S. W.
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    Aliev, M.
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    Alimonti, G.
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    Alkakhi, W.
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    Allaire, C.
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    Allbrooke, B. M.M.
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    Allen, J. F.
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    Allendes Flores, C. A.
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    Allport, P. P.
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    Aloisio, A.
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    Alonso, F.
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    Alpigiani, C.
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    Alvarez Estevez, M.
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    Alvarez Fernandez, A.
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    Alves Cardoso, M.
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    Alviggi, M. G.
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    Aly, M.
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    Amaral Coutinho, Y.
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    Ambler, A.
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    Amelung, C.
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    Amerl, M.
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    Ames, C. G.
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    Amidei, D.
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    Amor Dos Santos, S. P.
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    Amos, K. R.
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    Ananiev, V.
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    Anastopoulos, C.
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    Andeen, T.
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    Anders, J. K.
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    Andrean, S. Y.
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    Andreazza, A.
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    Angelidakis, S.
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    Angerami, A.
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    Anisenkov, A. V.
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    Annovi, A.
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    Antel, C.
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    Anthony, M. T.
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    Antipov, E.
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    Antonelli, M.
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    Anulli, F.
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    Aoki, M.
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    Aoki, T.
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    Aparisi Pozo, J. A.
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    Aparo, M. A.
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    Aperio Bella, L.
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    ; ;
    Fernandez Luengo, S.I.
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    Carolina Robles Gajardo
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    The observation of the electroweak production of single-top-quarks is made using 255 pb−1 of proton-proton collision data recorded at s√=5.02 TeV with the ATLAS detector at the Large Hadron Collider. An event selection is used to identify single-top-quark candidates arising from t-channel production with the top quark decaying semi-leptonically. Events passing the selection are then used to measure the inclusive cross-section for the combined production of single-top-quarks and antiquarks, σ(tq+t¯q), and the ratio Rt between these two. They are measured to be σ(tq+t¯q)=27.1+4.4−4.1(stat.)+4.4−3.7(syst.) pb and Rt=2.73+1.43−0.82(stat.)+1.01−0.29(syst.). The individual single-top-quark (tq) and single-top-antiquark (t¯q) production cross-sections are measured to be σ(tq)=19.8+3.9−3.1(stat.)+2.9−2.2(syst.) pb and σ(t¯q)=7.3+3.2−2.1(stat.)+2.8−1.5(syst.) pb. All measurements are in good agreement with the Standard Model predictions.