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Viaux Maira, Nicolas
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Nombre
Viaux Maira, Nicolas
Departamento
Campus / Sede
Campus Santiago San Joaquín
Email
ORCID
Scopus Author ID
57194523952
Now showing 1 - 3 of 3
- PublicationAzimuthal Angle Correlations of Muons Produced via Heavy-Flavor Decays in 5.02 TeV Pb+Pb and pp Collisions with the ATLAS Detector(2024-05-17)
;Filmer, E. K. ;Grant, C. M. ;Jackson, P. ;Kong, A. X.Y. ;Pandya, H. D. ;Potti, H. ;Ruggeri, T. A. ;Ting, E. X.L. ;White, M. J. ;Gingrich, D. M. ;Lindon, J. H. ;Nishu, N. ;Pinfold, J. L. ;Cakir, O. ;Yildiz, H. Duran ;Kuday, S. ;Turk Cakir, I. ;Sultansoy, S. ;Adam Bourdarios, C. ;Arnaez, O. ;Berger, N. ;Castillo, F. L. ;Costanza, F. ;Delmastro, M. ;Di Ciaccio, L. ;Hryn’ova, T. ;Jézéquel, S. ;Koletsou, I. ;Levêque, J. ;Lewis, D. J. ;Little, J. D. ;Lorenzo Martinez, N. ;Poddar, G. ;Sanchez Pineda, A. ;Sauvan, E. ;Bernardi, G. ;Bomben, M. ;Li, A. ;Li, T. ;Marchiori, G. ;Nakkalil, K. ;Shen, Q. ;Zhang, Y. ;Chekanov, S. ;Darmora, S. ;Hopkins, W. H. ;Hoya, J. ;Love, J. ;Luongo, N. A. ;Metcalfe, J. ;Mete, A. S. ;Paramonov, A. ;Proudfoot, J. ;Van Gemmeren, P. ;Wamorkar, T. ;Wang, R. ;Zhang, J. ;Cheu, E. ;Cui, Z. ;Ghosh, A. ;Johns, K. A. ;Lampl, W. ;Lindley, R. E. ;Loch, P. ;Rutherfoord, J. P. ;Sardain, J. ;Varnes, E. W. ;Zhou, H. ;Zhou, Y. ;Bakshi Gupta, D. ;Burghgrave, B. ;Cardenas, J. C.J. ;De, K. ;Farbin, A. ;Hadavand, H. K. ;Myers, A. J. ;Ozturk, N. ;Usai, G. ;White, A. ;Angelidakis, S. ;Fassouliotis, D. ;Fountas, L. ;Gkialas, I. ;Kourkoumelis, C. ;Alexopoulos, T. ;Drivas-Koulouris, I. ;Gazis, E. N. ;Kitsaki, C. ;Maltezos, S. ;Paraskevopoulos, C. ;Perganti, M. ;Tzanis, P. ;Andeen, T. ;Burton, C. D. ;Choi, K. ;Onyisi, P. U.E. ;Panchal, D. K. ;Tost, M. ;Unal, M. ;Huseynov, N.; ; ; ;Fernandez Luengo, S.I. ;Fuenzalida Garrido, S.; ;Carolina Robles Gajardo ;Tapia Araya, S.Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semileptonic decays of heavy quarks produced in 5.02 TeV Pb+Pb and 𝑝𝑝 collisions at the LHC. The muons are measured with transverse momenta and pseudorapidities satisfying 𝑝𝜇T>4 GeV and |𝜂𝜇|<2.4, respectively. The distributions of azimuthal angle separation Δ𝜙 for muon pairs having pseudorapidity separation |Δ𝜂|>0.8, are measured in different Pb+Pb centrality intervals and compared to the same distribution measured in 𝑝𝑝 collisions at the same center-of-mass energy. Results are presented separately for muon pairs with opposite-sign charges, same-sign charges, and all pairs. A clear peak is observed in all Δ𝜙 distributions at Δ𝜙∼𝜋, consistent with the parent heavy-quark pairs being produced via hard-scattering processes. The widths of that peak, characterized using Cauchy-Lorentz fits to the Δ𝜙 distributions, are found to not vary significantly as a function of Pb+Pb collision centrality and are similar for 𝑝𝑝 and Pb+Pb collisions. This observation will provide important constraints on theoretical descriptions of heavy-quark interactions with the quark-gluon plasma. - PublicationMeasurement of t-channel single-top-quark production in pp collisions at s=5.02 TeV with the ATLAS detector(2024-07-01)
;Aad, G. ;Abbott, B. ;Abeling, K. ;Abicht, N. J. ;Abidi, S. H. ;Aboulhorma, A. ;Abramowicz, H. ;Abreu, H. ;Abulaiti, Y. ;Acharya, B. S. ;Adam Bourdarios, C. ;Adamczyk, L. ;Adamek, L. ;Addepalli, S. V. ;Addison, M. J. ;Adelman, J. ;Adiguzel, A. ;Adye, T. ;Affolder, A. A. ;Afik, Y. ;Agaras, M. N. ;Agarwala, J. ;Aggarwal, A. ;Agheorghiesei, C. ;Ahmad, A. ;Ahmadov, F. ;Ahmed, W. S. ;Ahuja, S. ;Ai, X. ;Aielli, G. ;Aikot, A. ;Ait Tamlihat, M. ;Aitbenchikh, B. ;Aizenberg, I. ;Akbiyik, M. ;Åkesson, T. P.A. ;Akimov, A. V. ;Akiyama, D. ;Akolkar, N. N. ;Al Khoury, K. ;Alberghi, G. L. ;Albert, J. ;Albicocco, P. ;Albouy, G. L. ;Alderweireldt, S. ;Aleksa, M. ;Aleksandrov, I. N. ;Alexa, C. ;Alexopoulos, T. ;Alfonsi, F. ;Algren, M. ;Alhroob, M. ;Ali, B. ;Ali, H. M.J. ;Ali, S. ;Alibocus, S. W. ;Aliev, M. ;Alimonti, G. ;Alkakhi, W. ;Allaire, C. ;Allbrooke, B. M.M. ;Allen, J. F. ;Allendes Flores, C. A. ;Allport, P. P. ;Aloisio, A. ;Alonso, F. ;Alpigiani, C. ;Alvarez Estevez, M. ;Alvarez Fernandez, A. ;Alves Cardoso, M. ;Alviggi, M. G. ;Aly, M. ;Amaral Coutinho, Y. ;Ambler, A. ;Amelung, C. ;Amerl, M. ;Ames, C. G. ;Amidei, D. ;Amor Dos Santos, S. P. ;Amos, K. R. ;Ananiev, V. ;Anastopoulos, C. ;Andeen, T. ;Anders, J. K. ;Andrean, S. Y. ;Andreazza, A. ;Angelidakis, S. ;Angerami, A. ;Anisenkov, A. V. ;Annovi, A. ;Antel, C. ;Anthony, M. T. ;Antipov, E. ;Antonelli, M. ;Anulli, F. ;Aoki, M. ;Aoki, T. ;Aparisi Pozo, J. A. ;Aparo, M. A. ;Aperio Bella, L.; ; ;Fernandez Luengo, S.I.; ;Carolina Robles Gajardo; 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. - PublicationMeasurement of vector boson production cross sections and their ratios using pp collisions at s=13.6 TeV with the ATLAS detector(2024-07-01)
;Aad, G. ;Aakvaag, E. ;Abbott, B. ;Abdelhameed, S. ;Abeling, K. ;Abicht, N. J. ;Abidi, S. H. ;Aboelela, M. ;Aboulhorma, A. ;Abramowicz, H. ;Abreu, H. ;Abulaiti, Y. ;Acharya, B. S. ;Ackermann, A. ;Adam Bourdarios, C. ;Adamczyk, L. ;Addepalli, S. V. ;Addison, M. J. ;Adelman, J. ;Adiguzel, A. ;Adye, T. ;Affolder, A. A. ;Afik, Y. ;Agaras, M. N. ;Agarwala, J. ;Aggarwal, A. ;Agheorghiesei, C. ;Ahmad, A. ;Ahmadov, F. ;Ahmed, W. S. ;Ahuja, S. ;Ai, X. ;Aielli, G. ;Aikot, A. ;Ait Tamlihat, M. ;Aitbenchikh, B. ;Akbiyik, M. ;Åkesson, T. P.A. ;Akimov, A. V. ;Akiyama, D. ;Akolkar, N. N. ;Aktas, S. ;Al Khoury, K. ;Alberghi, G. L. ;Albert, J. ;Albicocco, P. ;Albouy, G. L. ;Alderweireldt, S. ;Alegria, Z. L. ;Aleksa, M. ;Aleksandrov, I. N. ;Alexa, C. ;Alexopoulos, T. ;Alfonsi, F. ;Algren, M. ;Alhroob, M. ;Ali, B. ;Ali, H. M.J. ;Ali, S. ;Alibocus, S. W. ;Aliev, M. ;Alimonti, G. ;Alkakhi, W. ;Allaire, C. ;Allbrooke, B. M.M. ;Allen, J. F. ;Allendes Flores, C. A. ;Allport, P. P. ;Aloisio, A. ;Alonso, F. ;Alpigiani, C. ;Alsolami, Z. M.K. ;Alvarez Estevez, M. ;Alvarez Fernandez, A. ;Alves Cardoso, M. ;Alviggi, M. G. ;Aly, M. ;Amaral Coutinho, Y. ;Ambler, A. ;Amelung, C. ;Amerl, M. ;Ames, C. G. ;Amidei, D. ;Amirie, K. J. ;Amor Dos Santos, S. P. ;Amos, K. R. ;An, S. ;Ananiev, V. ;Anastopoulos, C. ;Andeen, T. ;Anders, J. K. ;Andrean, S. Y. ;Andreazza, A. ;Angelidakis, S. ;Angerami, A. ;Anisenkov, A. V. ;Annovi, A. ;Antel, C. ;Antipov, E. ;Antonelli, M.; ;Fernandez Luengo, S.I. ;Fuenzalida Garrido, S.; ;Carolina Robles Gajardo; Fiducial and total 𝑊 ± and 𝑍 boson cross sections, their ratios and the ratio of top-antitop-quark pair and 𝑊 -boson fiducial cross sections are measured in proton–proton collisions at a centre-of-mass energy of √𝑠 = 13.6 TeV, corresponding to an integrated luminosity of 29 fb−1 of data collected in 2022 by the ATLAS experiment at the Large Hadron Collider. The measured fiducial cross-section values for 𝑊 + → 𝓁+𝜈, 𝑊 − → 𝓁−𝜈̄, and 𝑍 → 𝓁+𝓁− (𝓁 = 𝑒 or 𝜇) boson productions are 4250 ± 150 pb, 3310 ± 120 pb, and 744 ± 20 pb, respectively, where the uncertainty is the total uncertainty, including that arising from the luminosity of about 2.2%. The measurements are in agreement with Standard-Model predictions calculated at next-to-next-to-leading-order in 𝛼𝑠 , next-to-nextto-leading logarithmic accuracy and next-to-leading-order electroweak accuracy