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Measurement of the energy asymmetry in $t{\bar{t}}j$ production at $13\,$TeV with the ATLAS experiment and interpretation in the SMEFT framework

Aad, Georges ; Abbott, Braden Keim ; Abbott, Dale ; Abed Abud, Adam ; Abeling, Kira ; Abhayasinghe, Deshan Kavishka ; Abidi, Haider ; Aboulhorma, Asmaa ; Abramowicz, Halina ; Abreu, Henso ; Abulaiti, Yiming ; Hoffman Abusleme, A.C. ; Acharya, Bobby Samir ; Achkar, Baida ; Adam, Lennart ; Adam Bourdarios, Claire ; Adamczyk, Leszek ; Adamek, Lukas ; Addepalli, Sagar ; Adelman, Jahred ; Adiguzel, Aytul ; Adorni Braccesi Chiassi, Sofia ; Adye, Tim ; Affolder, A.A. ; Affolder, Tony ; Afik, Yoav ; Agapopoulou, Christina ; Agaras, Merve Nazlim ; Agarwala, Jinky ; Aggarwal, Anamika ; Agheorghiesei, Catalin ; Aguilar Saavedra, Juan Antonio ; Ahmad, Ammara ; Ahmadov, Faig ; Ahmed, Waleed Syed ; Ai, Xiaocong ; Aielli, Giulio ; Aizenberg, Iakov ; Akatsuka, Shunichi ; Akbiyik, Melike ; Akesson, Torsten ; Akimov, Andrei ; Al Khoury, Konie ; Alberghi, Gian Luigi ; Albert, Justin ; Albicocco, Pietro ; Verzini Alconada, M.J. ; Alderweireldt, Sara ; Aleksa, Martin ; Aleksandrov, I.N. ; Alexa, Calin ; Alexopoulos, Theodoros ; Alfonsi, Alice ; Alfonsi, Fabrizio ; Alhroob, Muhammad ; Ali, Babar ; Ali, Shahzad ; Aliev, Malik ; Alimonti, Gianluca ; Allaire, Corentin ; Allbrooke, Benedict ; Allport, Philip Patrick ; Aloisio, Alberto ; Alonso, Francisco ; Alpigiani, Cristiano ; Alunno Camelia, Elio ; Alvarez Estevez, Manuel ; Alviggi, Mariagrazia ; Do Amaral Coutinho, Yara ; Ambler, Alessandro ; Ambroz, Luca ; Amelung, Christoph ; Amidei, Dante ; Amor dos Santos, Susana Patricia ; Amoroso, Simone ; Amos, Kieran Robert ; Amrouche, Cherifa Sabrina ; Ananiev, Viktor ; Anastopoulos, Christos ; Andari, Nansi ; Andeen, Timothy Robert ; Anders, John Kenneth ; Andrean, Stefio Yosse ; Andreazza, Attilio ; Angelidakis, Stylianos ; Angerami, Aaron ; Anisenkov, Alexey ; Annovi, Alberto ; Antel, Claire ; Anthony, Matthew Thomas ; Antipov, Egor ; Antonelli, Mario ; Antrim, Daniel Joseph ; Anulli, Fabio ; Aoki, Masato ; Aparisi Pozo, Javier Alberto ; Aparo, Marco ; Aperio Bella, Ludovica ; Aranzabal Barrio, Nordin ; Araujo Ferraz, Victor

The European physical journal. C, Particles and fields, 2022, Vol.82 (4) [Periódico revisado por pares]

Springer Verlag (Germany)

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Título:
Measurement of the energy asymmetry in $t{\bar{t}}j$ production at $13\,$TeV with the ATLAS experiment and interpretation in the SMEFT framework
Autor: Aad, Georges ; Abbott, Braden Keim ; Abbott, Dale ; Abed Abud, Adam ; Abeling, Kira ; Abhayasinghe, Deshan Kavishka ; Abidi, Haider ; Aboulhorma, Asmaa ; Abramowicz, Halina ; Abreu, Henso ; Abulaiti, Yiming ; Hoffman Abusleme, A.C. ; Acharya, Bobby Samir ; Achkar, Baida ; Adam, Lennart ; Adam Bourdarios, Claire ; Adamczyk, Leszek ; Adamek, Lukas ; Addepalli, Sagar ; Adelman, Jahred ; Adiguzel, Aytul ; Adorni Braccesi Chiassi, Sofia ; Adye, Tim ; Affolder, A.A. ; Affolder, Tony ; Afik, Yoav ; Agapopoulou, Christina ; Agaras, Merve Nazlim ; Agarwala, Jinky ; Aggarwal, Anamika ; Agheorghiesei, Catalin ; Aguilar Saavedra, Juan Antonio ; Ahmad, Ammara ; Ahmadov, Faig ; Ahmed, Waleed Syed ; Ai, Xiaocong ; Aielli, Giulio ; Aizenberg, Iakov ; Akatsuka, Shunichi ; Akbiyik, Melike ; Akesson, Torsten ; Akimov, Andrei ; Al Khoury, Konie ; Alberghi, Gian Luigi ; Albert, Justin ; Albicocco, Pietro ; Verzini Alconada, M.J. ; Alderweireldt, Sara ; Aleksa, Martin ; Aleksandrov, I.N. ; Alexa, Calin ; Alexopoulos, Theodoros ; Alfonsi, Alice ; Alfonsi, Fabrizio ; Alhroob, Muhammad ; Ali, Babar ; Ali, Shahzad ; Aliev, Malik ; Alimonti, Gianluca ; Allaire, Corentin ; Allbrooke, Benedict ; Allport, Philip Patrick ; Aloisio, Alberto ; Alonso, Francisco ; Alpigiani, Cristiano ; Alunno Camelia, Elio ; Alvarez Estevez, Manuel ; Alviggi, Mariagrazia ; Do Amaral Coutinho, Yara ; Ambler, Alessandro ; Ambroz, Luca ; Amelung, Christoph ; Amidei, Dante ; Amor dos Santos, Susana Patricia ; Amoroso, Simone ; Amos, Kieran Robert ; Amrouche, Cherifa Sabrina ; Ananiev, Viktor ; Anastopoulos, Christos ; Andari, Nansi ; Andeen, Timothy Robert ; Anders, John Kenneth ; Andrean, Stefio Yosse ; Andreazza, Attilio ; Angelidakis, Stylianos ; Angerami, Aaron ; Anisenkov, Alexey ; Annovi, Alberto ; Antel, Claire ; Anthony, Matthew Thomas ; Antipov, Egor ; Antonelli, Mario ; Antrim, Daniel Joseph ; Anulli, Fabio ; Aoki, Masato ; Aparisi Pozo, Javier Alberto ; Aparo, Marco ; Aperio Bella, Ludovica ; Aranzabal Barrio, Nordin ; Araujo Ferraz, Victor
Assuntos: High Energy Physics - Experiment ; Physics
É parte de: The European physical journal. C, Particles and fields, 2022, Vol.82 (4)
Descrição: A measurement of the energy asymmetry in jet-associated top-quark pair production is presented using $139\,{\mathrm {fb}}^{-1}$ of data collected by the ATLAS detector at the Large Hadron Collider during pp collisions at $\sqrt{s}=13\,\text {TeV}$. The observable measures the different probability of top and antitop quarks to have the higher energy as a function of the jet scattering angle with respect to the beam axis. The energy asymmetry is measured in the semileptonic $t{\bar{t}}$ decay channel, and the hadronically decaying top quark must have transverse momentum above $350\,\text {GeV}$. The results are corrected for detector effects to particle level in three bins of the scattering angle of the associated jet. The measurement agrees with the SM prediction at next-to-leading-order accuracy in quantum chromodynamics in all three bins. In the bin with the largest expected asymmetry, where the jet is emitted perpendicular to the beam, the energy asymmetry is measured to be $-0.043\pm 0.020$, in agreement with the SM prediction of $-0.037\pm 0.003$. Interpreting this result in the framework of the Standard Model effective field theory (SMEFT), it is shown that the energy asymmetry is sensitive to the top-quark chirality in four-quark operators and is therefore a valuable new observable in global SMEFT fits.
Editor: Springer Verlag (Germany)
Idioma: Inglês

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Measurement of the energy asymmetry in $t{\bar{t}}j$ production at $13\,$TeV with the ATLAS experiment and interpretation in the SMEFT framework

Springer Verlag (Germany)

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