Author: "Abusleme Hoffman, AC [0000-0003-0762-7204]" - Searchworks@Jio Institute Digital Library Search Results

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15 results on '"Abusleme Hoffman, AC [0000-0003-0762-7204]"'

1. Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abeling, K, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam Bourdarios, C, 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, Al Khoury, K, Alberghi, GL, Albert, J, Albicocco, P, 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, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Aly, M, Amaral Coutinho, Y, Ambler, A, Amelung, C, Ames, CG, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amos, KR, 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, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Appelt, C, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abeling, K [0000-0002-1002-1652], Abidi, SH [0000-0002-8496-9294], Aboulhorma, A [0000-0002-9987-2292], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Addepalli, SV [0000-0002-2919-6663], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmed, WS [0000-0003-0128-3279], Ahuja, S [0000-0003-4368-9285], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Aizenberg, I [0000-0003-2150-1624], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Albicocco, P [0000-0001-6430-1038], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Alkakhi, W [0000-0001-9355-4245], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Aly, M [0000-0003-3043-3715], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ames, CG [0000-0002-2126-4246], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Amos, KR [0000-0003-1757-5620], Ananiev, V [0000-0003-3649-7621], Anastopoulos, C [0000-0003-1587-5830], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aoki, T [0000-0002-6618-5170], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Appelt, C [0000-0003-1205-6784], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], and Apollo - University of Cambridge Repository
Subjects: 51 Physical Sciences, 5107 Particle and High Energy Physics
Abstract: In a special run of the LHC with $$\beta ^{\star } = 2.5$$ β ⋆ = 2.5 km, proton–proton elastic-scattering events were recorded at $$\sqrt{s} = 13$$ s = 13 TeV with an integrated luminosity of $$340~\upmu {\text {b}}^{-1}$$ 340 μ b - 1 using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured differentially in the Mandelstam t variable in the range from $$-t = 2.5 \cdot 10^{-4}$$ - t = 2.5 · 10 - 4 GeV$$^{2}$$ 2 to $$-t = 0.46$$ - t = 0.46 GeV$$^{2}$$ 2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section $$\sigma _{\text {tot}}$$ σ tot , parameters of the nuclear slope, and the $$\rho $$ ρ -parameter defined as the ratio of the real part to the imaginary part of the elastic-scattering amplitude in the limit $$t \rightarrow 0$$ t → 0 . These parameters are determined from a fit to the differential elastic cross section using the optical theorem and different parameterizations of the t-dependence. The results for $$\sigma _{\text {tot}}$$ σ tot and $$\rho $$ ρ are $$\begin{aligned} \sigma _{\text {tot}}(pp\rightarrow X) = 104.7 \pm 1.1 \; \text{ mb },\quad \rho = 0.098 \pm 0.011 . \end{aligned}$$ σ tot ( p p → X ) = 104.7 ± 1.1 mb , ρ = 0.098 ± 0.011 . The uncertainty in $$\sigma _{\text {tot}}$$ σ tot is dominated by the luminosity measurement, and in $$\rho $$ ρ by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude.
Published: 2023

2. Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb −1 of pp collision data at √s = 13 TeV

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Addepalli, SV, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Aizenberg, I, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Albicocco, P, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amos, KR, Amrouche, CS, Ananiev, V, Anastopoulos, C, Andari, N, 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, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Aboulhorma, A [0000-0002-9987-2292], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Addepalli, SV [0000-0002-2919-6663], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Aizenberg, I [0000-0003-2150-1624], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Albicocco, P [0000-0001-6430-1038], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Amos, KR [0000-0003-1757-5620], Ananiev, V [0000-0003-3649-7621], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], and Apollo - University of Cambridge Repository
Subjects: Hadron-Hadron Scattering, Higgs Physics, High Energy Physics::Phenomenology, Beyond Standard Model, High Energy Physics::Experiment
Abstract: Searches are conducted for new spin-0 or spin-1 bosons using events where a Higgs boson with mass $125$ GeV decays into four leptons ($\ell =$ $e$,$\mu$). This decay is presumed to occur via an intermediate state which contains two on-shell, promptly decaying bosons: $H \rightarrow XX/ZX \rightarrow 4\ell$, where the new boson $X$ has a mass between 1 and 60 GeV. The search uses $pp$ collision data collected with the ATLAS detector at the LHC with an integrated luminosity of 139 fb$^{-1}$ at a centre-of-mass energy $\sqrt{s}=13$ TeV. The data are found to be consistent with Standard Model expectations. Limits are set on fiducial cross sections and on the branching ratio of the Higgs boson to decay into $XX/ZX$, improving those from previous publications by a factor between two and four. Limits are also set on mixing parameters relevant in extensions of the Standard Model containing a dark sector where $X$ is interpreted to be a dark boson.
Published: 2022
Full Text: View/download PDF

3. Measurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Argyropoulos, S, Arling, JH, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], Argyropoulos, S [0000-0001-7748-1429], Arling, JH [0000-0002-1577-5090], and Apollo - University of Cambridge Repository
Subjects: Top physics, Hadron-Hadron scattering (experiments), High Energy Physics::Experiment
Abstract: A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb$^{-1}$ is presented. Events are selected if they contain a single lepton (electron or muon) or an opposite-sign lepton pair, in association with multiple jets. The events are categorised according to the number of jets and how likely these are to contain $b$-hadrons. A multivariate technique is then used to discriminate between signal and background events. The measured four-top-quark production cross section is found to be 26$^{+17}_{-15}$ fb, with a corresponding observed (expected) significance of 1.9 (1.0) standard deviations over the background-only hypothesis. The result is combined with the previous measurement performed by the ATLAS Collaboration in the multilepton final state. The combined four-top-quark production cross section is measured to be 24$^{+7}_{-6}$ fb, with a corresponding observed (expected) signal significance of 4.7 (2.6) standard deviations over the background-only predictions. It is consistent within 2.0 standard deviations with the Standard Model expectation of 12.0$\pm$2.4 fb.
Published: 2022
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4. Search for dark matter produced in association with a Standard Model Higgs boson decaying into b-quarks using the full Run 2 dataset from the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Argyropoulos, S, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], AbouZeid, OS [0000-0002-8279-9324], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], Argyropoulos, S [0000-0001-7748-1429], and Apollo - University of Cambridge Repository
Subjects: Hadron-Hadron scattering, Quantum Physics, Particle and Plasma Physics, Hadron-Hadron scattering (experiments), High Energy Physics::Phenomenology, Dark matter, Molecular, Nuclear, High Energy Physics::Experiment, Atomic, Nuclear & Particles Physics, Mathematical Physics
Abstract: The production of dark matter in association with Higgs bosons is predicted in several extensions of the Standard Model. An exploration of such scenarios is presented, considering final states with missing transverse momentum and b-tagged jets consistent with a Higgs boson. The analysis uses proton-proton collision data at a centre-of-mass energy of 13 TeV recorded by the ATLAS experiment at the LHC during Run 2, amounting to an integrated luminosity of 139 fb−1. The analysis, when compared with previous searches, benefits from a larger dataset, but also has further improvements providing sensitivity to a wider spectrum of signal scenarios. These improvements include both an optimised event selection and advances in the object identification, such as the use of the likelihood-based significance of the missing transverse momentum and variable-radius track-jets. No significant deviation from Standard Model expectations is observed. Limits are set, at 95% confidence level, in two benchmark models with two Higgs doublets extended by either a heavy vector boson Z′ or a pseudoscalar singlet a and which both provide a dark matter candidate χ. In the case of the two-Higgs-doublet model with an additional vector boson Z′, the observed limits extend up to a Z′ mass of 3 TeV for a mass of 100 GeV for the dark matter candidate. The two-Higgs-doublet model with a dark matter particle mass of 10 GeV and an additional pseudoscalar a is excluded for masses of the a up to 520 GeV and 240 GeV for tan β = 1 and tan β = 10 respectively. Limits on the visible cross-sections are set and range from to 0.05 fb to 3.26 fb, depending on the missing transverse momentum and b-quark jet multiplicity requirements. [Figure not available: see fulltext.]
Published: 2022
Full Text: View/download PDF

5. Search for exotic decays of the Higgs boson into long-lived particles in pp collisions at √s = 13 TeV using displaced vertices in the ATLAS inner detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Argyropoulos, S, Arling, JH, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], Argyropoulos, S [0000-0001-7748-1429], Arling, JH [0000-0002-1577-5090], and Apollo - University of Cambridge Repository
Subjects: Exotics, Quantum Physics, High Energy Physics::Phenomenology, Molecular, Higgs physics, Atomic, Nuclear & Particles Physics, proton-proton scattering, Hadron-Hadron scattering, Particle and Plasma Physics, Hadron-Hadron scattering (experiments), Nuclear, High Energy Physics::Experiment, Mathematical Physics, Lifetime
Abstract: A novel search for exotic decays of the Higgs boson into pairs of long-lived neutral particles, each decaying into a bottom quark pair, is performed using 139 fb−1 of s = 13 TeV proton-proton collision data collected with the ATLAS detector at the LHC. Events consistent with the production of a Higgs boson in association with a leptonically decaying Z boson are analysed. Long-lived particle (LLP) decays are reconstructed from inner-detector tracks as displaced vertices with high mass and track multiplicity relative to Standard Model processes. The analysis selection requires the presence of at least two displaced vertices, effectively suppressing Standard Model backgrounds. The residual background contribution is estimated using a data-driven technique. No excess over Standard Model predictions is observed, and upper limits are set on the branching ratio of the Higgs boson to LLPs. Branching ratios above 10% are excluded at 95% confidence level for LLP mean proper lifetimes cτ as small as 4 mm and as large as 100 mm. For LLP masses below 40 GeV, these results represent the most stringent constraint in this lifetime regime. [Figure not available: see fulltext.]
Published: 2022
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6. Measurement of the c-jet mistagging efficiency in tt¯ events using pp collision data at √s=13 TeV collected with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abud, AA, Abeling, K, Abhayasinghe, DK, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Addepalli, SV, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Aizenberg, I, Akatsuka, S, 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, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Coutinho, YA, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amos, KR, Amrouche, CS, Ananiev, V, Anastopoulos, C, Andari, N, 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, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Ferraz, VA, Arcangeletti, C, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abud, AA [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Aboulhorma, A [0000-0002-9987-2292], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Addepalli, SV [0000-0002-2919-6663], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Aizenberg, I [0000-0003-2150-1624], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Khoury, KA [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Albicocco, P [0000-0001-6430-1038], Verzini, MJA [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Coutinho, YA [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Amos, KR [0000-0003-1757-5620], Ananiev, V [0000-0003-3649-7621], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Ferraz, VA [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], and Apollo - University of Cambridge Repository
Subjects: Quantum Physics, Particle and Plasma Physics, hep-ex, Astrophysics::High Energy Astrophysical Phenomena, Molecular, Nuclear, High Energy Physics::Experiment, Atomic, Nuclear & Particles Physics
Abstract: A technique is presented to measure the efficiency with which $c$-jets are mistagged as b-jets (mistagging efficiency) using $t\bar{t}$ events, where one of the $W$ bosons decays into an electron or muon and a neutrino and the other decays into a quark-antiquark pair. The measurement utilises the relatively large and known $W\to cs$ branching ratio, which allows a measurement to be made in an inclusive $c$-jet sample. The data sample used was collected by the ATLAS detector at $\sqrt{s} = 13$ TeV and corresponds to an integrated luminosity of 139 fb$^{-1}$. Events are reconstructed using a kinematic likelihood technique which selects the mapping between jets and $t\bar{t}$ decay products that yields the highest likelihood value. The distribution of the $b$-tagging discriminant for jets from the hadronic $W$ decays in data is compared with that in simulation to extract the mistagging efficiency as a function of jet transverse momentum. The total uncertainties are in the range 3%-17%. The measurements generally agree with those in simulation but there are some differences in the region corresponding to the most stringent $b$-jet tagging requirement.
Published: 2022
Full Text: View/download PDF

7. Search for exotic decays of the Higgs boson into b b¯ and missing transverse momentum in pp collisions at √s = 13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Addepalli, SV, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Aizenberg, I, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Addepalli, SV [0000-0002-2919-6663], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Aizenberg, I [0000-0003-2150-1624], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], and Apollo - University of Cambridge Repository
Subjects: Quantum Physics, Regular Article - Experimental Physics, High Energy Physics::Phenomenology, Molecular, Atomic, Nuclear & Particles Physics, Hadron-Hadron scattering, Particle and Plasma Physics, Hadron-Hadron scattering (experiments), Beyond Standard Model, Nuclear, High Energy Physics::Experiment, Supersymmetry, Mathematical Physics
Abstract: A search for the exotic decay of the Higgs boson ($H$) into a $b\bar{b}$ resonance plus missing transverse momentum is described. The search is performed with the ATLAS detector at the Large Hadron Collider using 139 $\mathrm{fb}^{-1}$ of $pp$ collisions at $\sqrt{s} = 13$ TeV. The search targets events from $ZH$ production in an NMSSM scenario where $H \rightarrow \tilde{\chi}^{0}_{2}\tilde{\chi}^{0}_{1}$, with $\tilde{\chi}^{0}_{2} \rightarrow {a} \tilde{\chi}^{0}_{1}$, where $a$ is a light pseudoscalar Higgs boson and $\tilde{\chi}^{0}_{1,2}$ are the two lightest neutralinos. The decay of the $a$ boson into a pair of $b$-quarks results in a peak in the dijet invariant mass distribution. The final-state signature consists of two leptons, two or more jets, at least one of which is identified as originating from a $b$-quark, and missing transverse momentum. Observations are consistent with Standard Model expectations and upper limits are set on the product of cross section times branching ratio for a three-dimensional scan of the masses of the $\tilde{\chi}^{0}_{2}$, $\tilde{\chi}^{0}_{1}$ and $a$ boson.
Published: 2022
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8. Search for long-lived charginos based on a disappearing-track signature using 136 fb - 1 of pp collisions at √s = 13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Camelia, EA, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Pozo, JAA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Argyropoulos, S, Arling, JH, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Pozo, JAA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], Argyropoulos, S [0000-0001-7748-1429], Arling, JH [0000-0002-1577-5090], and Apollo - University of Cambridge Repository
Subjects: Regular Article - Experimental Physics, hep-ex
Abstract: A search for long-lived charginos produced either directly or in the cascade decay of heavy prompt gluino states is presented. The search is based on proton-proton collision data collected at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 136 fb$^{-1}$. Long-lived charginos are characterised by a distinct signature of a short and then disappearing track, and are reconstructed using at least four measurements in the ATLAS pixel detector, with no subsequent measurements in the silicon-microstrip tracking volume nor any associated energy deposits in the calorimeter. The final state is complemented by a large missing transverse-momentum requirement for triggering purposes and at least one high-transverse-momentum jet. No excess above the expected backgrounds is observed. Exclusion limits are set at 95% confidence level on the masses of the chargino and gluino for different chargino lifetimes. Chargino masses up to 660 (210) GeV are excluded in scenarios where the chargino is a pure wino (higgsino). For charginos produced during the cascade decay of a heavy gluino, gluinos with masses below 2.1 TeV are excluded for a chargino mass of 300 GeV and a lifetime of 0.2 ns.
Published: 2022

9. Search for type-III seesaw heavy leptons in leptonic final states in pp collisions at √s=13TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abud, AA, Abeling, K, Abhayasinghe, DK, Abidi, SH, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Bourdarios, CA, Adamczyk, L, Adamek, L, Addepalli, SV, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Aizenberg, I, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Albicocco, P, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Camelia, EA, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, 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, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abud, AA [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Bourdarios, CA [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Addepalli, SV [0000-0002-2919-6663], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Aizenberg, I [0000-0003-2150-1624], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Albicocco, P [0000-0001-6430-1038], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], and Apollo - University of Cambridge Repository
Subjects: Regular Article - Experimental Physics, 5106 Nuclear and Plasma Physics, 51 Physical Sciences, 5107 Particle and High Energy Physics
Abstract: A search for the pair production of heavy leptons as predicted by the type-III seesaw mechanism is presented. The search uses proton–proton collision data at a centre-of-mass energy of 13 TeV, corresponding to $$139\,\text {fb}^{-1}$$ 139 fb - 1 of integrated luminosity recorded by the ATLAS detector during Run 2 of the Large Hadron Collider. The analysis focuses on final states with three or four electrons or muons from the possible decays of new heavy leptons via intermediate electroweak bosons. No significant deviations above the Standard Model expectation are observed; upper and lower limits on the heavy lepton production cross-section and masses are derived respectively. These results are then combined for the first time with the ones already published by ATLAS using the channel with two leptons in the final state. The observed lower limit on the mass of the type-III seesaw heavy leptons combining two, three and four lepton channels together is 910 GeV at the 95% confidence level.
Published: 2022

10. Search for flavour-changing neutral-current interactions of a top quark and a gluon in pp collisions at √s=13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Addepalli, SV, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Aizenberg, I, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Albicocco, P, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amos, KR, Amrouche, CS, Ananiev, V, Anastopoulos, C, Andari, N, 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, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Aboulhorma, A [0000-0002-9987-2292], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Addepalli, SV [0000-0002-2919-6663], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Aizenberg, I [0000-0003-2150-1624], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Albicocco, P [0000-0001-6430-1038], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Amos, KR [0000-0003-1757-5620], Ananiev, V [0000-0003-3649-7621], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], and Apollo - University of Cambridge Repository
Subjects: Quantum Physics, Particle and Plasma Physics, Regular Article - Experimental Physics, hep-ex, High Energy Physics::Phenomenology, Molecular, Nuclear, High Energy Physics::Experiment, Atomic, Nuclear & Particles Physics
Abstract: A search is presented for the production of a single top quark via left-handed flavour-changing neutral-current (FCNC) interactions of a top quark, a gluon and an up or charm quark. Two production processes are considered: $u+g\rightarrow t$ and $c+g\rightarrow t$. The analysis is based on proton-proton collision data taken at a centre-of-mass energy of 13$\,$TeV with the ATLAS detector at the LHC. The data set corresponds to an integrated luminosity of 139 fb$^{-1}$. Events with exactly one electron or muon, exactly one $b$-tagged jet and missing transverse momentum are selected, resembling the decay products of a singly produced top quark. Neural networks based on kinematic variables differentiate between events from the two signal processes and events from background processes. The measured data are consistent with the background-only hypothesis, and limits are set on the production cross-sections of the signal processes: $\sigma(u+g\rightarrow t)\times\mathcal{B}(t\rightarrow Wb)\times\mathcal{B}(W\rightarrow \ell\nu)
Published: 2022

11. A search for the decays of stopped long-lived particles at √s = 13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akilli, E, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], AbouZeid, OS [0000-0002-8279-9324], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akilli, E [0000-0003-1309-5937], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], and Apollo - University of Cambridge Repository
Subjects: Hadron-Hadron scattering, Quantum Physics, Particle and Plasma Physics, Hadron-Hadron scattering (experiments), Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Molecular, High Energy Physics::Experiment, Nuclear, Nuclear & Particles Physics, Atomic, Mathematical Physics
Abstract: A search for long-lived particles, which have come to rest within the ATLAS detector, is presented. The subsequent decays of these long-lived particles can produce high-momentum jets, resulting in large out-of-time energy deposits in the ATLAS calorimeters. These decays are detected using data collected during periods in the LHC bunch structure when collisions are absent. The analysed dataset is composed of events from proton-proton collisions produced by the Large Hadron Collider at a centre-of-mass energy of $\sqrt{s}=13$ TeV and recorded by the ATLAS experiment during 2017 and 2018. The dataset used for this search corresponds to a total live time of 579 hours. The results of this search are used to derive lower limits on the mass of gluino $R$-hadrons, assuming a branching fraction $B(\tilde{g} \rightarrow q \bar{q} \tilde{\chi}_1^0)=100$%, with masses of up to 1.4 TeV excluded for gluino lifetimes of $10^{-5}$ to $10^3$ s.
Published: 2021

12. Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Addepalli, SV, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Aizenberg, I, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, 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, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, J-F, Argyropoulos, S, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Addepalli, SV [0000-0002-2919-6663], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Aizenberg, I [0000-0003-2150-1624], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], Argyropoulos, S [0000-0001-7748-1429], and Apollo - University of Cambridge Repository
Subjects: Quantum Physics, Molecular, photon production, Atomic, Nuclear & Particles Physics, QCD, proton-proton scattering, Hadron-Hadron scattering, Particle and Plasma Physics, Hadron-Hadron scattering (experiments), Nuclear, High Energy Physics::Experiment, Mathematical Physics
Abstract: A measurement of prompt photon-pair production in proton-proton collisions at s = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb−1. Events with two photons in the well-instrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT,γ1(2)> 40 (30) GeV for the leading (sub-leading) photon. The differential cross sections as functions of several observables for the diphoton system are measured and compared with theoretical predictions from state-of-the-art Monte Carlo and fixed-order calculations. The QCD predictions from next-to-next-to-leading-order calculations and multi-leg merged calculations are able to describe the measured integrated and differential cross sections within uncertainties, whereas lower-order calculations show significant deviations, demonstrating that higher-order perturbative QCD corrections are crucial for this process. The resummed predictions with parton showers additionally provide an excellent description of the low transverse-momentum regime of the diphoton system. [Figure not available: see fulltext.].
Published: 2021

13. Measurement of b-quark fragmentation properties in jets using the decay B ± → J/ψK ± in pp collisions at √s = 13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Argyropoulos, S, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], AbouZeid, OS [0000-0002-8279-9324], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], Argyropoulos, S [0000-0001-7748-1429], and Apollo - University of Cambridge Repository
Subjects: Hadron-Hadron scattering (experiments), Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: The fragmentation properties of jets containing $b$-hadrons are studied using charged $B$ mesons in 139 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 13$ TeV, recorded with the ATLAS detector at the LHC during the period from 2015 to 2018. The $B$ mesons are reconstructed using the decay of $B^{\pm}$ into $J/\psi K^{\pm}$, with the $J/\psi$ decaying into a pair of muons. Jets are reconstructed using the anti-$k_t$ algorithm with radius parameter $R=0.4$. The measurement determines the longitudinal and transverse momentum profiles of the reconstructed $B$ hadrons with respect to the axes of the jets to which they are geometrically associated. These distributions are measured in intervals of the jet transverse momentum, ranging from 50 GeV to above 100 GeV. The results are corrected for detector effects and compared with several Monte Carlo predictions using different parton shower and hadronisation models. The results for the longitudinal and transverse profiles provide useful inputs to improve the description of heavy-flavour fragmentation in jets.
Published: 2021

14. Search for chargino–neutralino pair production in final states with three leptons and missing transverse momentum in √s=13 TeV pp collisions with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akimov, AV, Khoury, KA, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Coutinho, YA, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Argyropoulos, S, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], AbouZeid, OS [0000-0002-8279-9324], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Khoury, KA [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Coutinho, YA [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], Argyropoulos, S [0000-0001-7748-1429], and Apollo - University of Cambridge Repository
Subjects: Quantum Physics, Particle and Plasma Physics, hep-ex, High Energy Physics::Phenomenology, Molecular, Nuclear, High Energy Physics::Experiment, Atomic, Nuclear & Particles Physics
Abstract: A search for chargino$-$neutralino pair production in three-lepton final states with missing transverse momentum is presented. The study is based on a dataset of $\sqrt{s} = 13$ TeV $pp$ collisions recorded with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb$^{-1}$. No significant excess relative to the Standard Model predictions is found in data. The results are interpreted in simplified models of supersymmetry, and statistically combined with results from a previous ATLAS search for compressed spectra in two-lepton final states. Various scenarios for the production and decay of charginos ($\tilde\chi^\pm_1$) and neutralinos ($\tilde\chi^0_2$) are considered. For pure higgsino $\tilde\chi^\pm_1\tilde\chi^0_2$ pair-production scenarios, exclusion limits at 95% confidence level are set on $\tilde\chi^0_2$ masses up to 210 GeV. Limits are also set for pure wino $\tilde\chi^\pm_1\tilde\chi^0_2$ pair production, on $\tilde\chi^0_2$ masses up to 640 GeV for decays via on-shell $W$ and $Z$ bosons, up to 300 GeV for decays via off-shell $W$ and $Z$ bosons, and up to 190 GeV for decays via $W$ and Standard Model Higgs bosons.
Published: 2021

15. Measurements of W + W −+ ≥ 1 jet production cross-sections in pp collisions at √s = 13 TeV with the ATLAS detector

Author: Aad, G, Abbott, B, Abbott, DC, Abed Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam, L, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agapopoulou, C, Agaras, MN, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ai, X, Aielli, G, Akatsuka, S, Akbiyik, M, Åkesson, TPA, Akilli, E, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Alconada Verzini, MJ, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Amaral Coutinho, Y, Ambler, A, Ambroz, L, Amelung, C, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amrouche, CS, Anastopoulos, C, Andari, N, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Andrei, V, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF, Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abed Abud, A [0000-0002-2788-3822], Abeling, K [0000-0002-1002-1652], Abhayasinghe, DK [0000-0002-2987-4006], Abidi, SH [0000-0002-8496-9294], AbouZeid, OS [0000-0002-8279-9324], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam, L [0000-0001-6005-2812], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agapopoulou, C [0000-0002-2368-0147], Agaras, MN [0000-0002-4355-5589], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmadov, F [0000-0003-3644-540X], Ahmed, WS [0000-0003-0128-3279], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Akatsuka, S [0000-0002-1681-6405], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akilli, E [0000-0003-1309-5937], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Alconada Verzini, MJ [0000-0003-2212-7830], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ambroz, L [0000-0002-0987-6637], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Anastopoulos, C [0000-0003-1587-5830], Andari, N [0000-0002-4935-4753], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], and Apollo - University of Cambridge Repository
Subjects: Hadron-Hadron scattering (experiments), Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Fiducial and differential measurements of $W^+W^-$ production in events with at least one hadronic jet are presented. These cross-section measurements are sensitive to the properties of electroweak-boson self-interactions and provide a test of perturbative quantum chromodynamics and the electroweak theory. The analysis is performed using proton$-$proton collision data collected at $\sqrt{s}=13~$TeV with the ATLAS experiment, corresponding to an integrated luminosity of 139$~$fb$^{-1}$. Events are selected with exactly one oppositely charged electron$-$muon pair and at least one hadronic jet with a transverse momentum of $p_{\mathrm{T}}>30~$GeV and a pseudorapidity of $|\eta
Published: 2021

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15 results on '"Abusleme Hoffman, AC [0000-0003-0762-7204]"'

1. Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector

2. Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb −1 of pp collision data at √s = 13 TeV

3. Measurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector

4. Search for dark matter produced in association with a Standard Model Higgs boson decaying into b-quarks using the full Run 2 dataset from the ATLAS detector

5. Search for exotic decays of the Higgs boson into long-lived particles in pp collisions at √s = 13 TeV using displaced vertices in the ATLAS inner detector

6. Measurement of the c-jet mistagging efficiency in tt¯ events using pp collision data at √s=13 TeV collected with the ATLAS detector

7. Search for exotic decays of the Higgs boson into b b¯ and missing transverse momentum in pp collisions at √s = 13 TeV with the ATLAS detector

8. Search for long-lived charginos based on a disappearing-track signature using 136 fb - 1 of pp collisions at √s = 13 TeV with the ATLAS detector

9. Search for type-III seesaw heavy leptons in leptonic final states in pp collisions at √s=13TeV with the ATLAS detector

10. Search for flavour-changing neutral-current interactions of a top quark and a gluon in pp collisions at √s=13 TeV with the ATLAS detector

11. A search for the decays of stopped long-lived particles at √s = 13 TeV with the ATLAS detector

12. Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector

13. Measurement of b-quark fragmentation properties in jets using the decay B ± → J/ψK ± in pp collisions at √s = 13 TeV with the ATLAS detector

14. Search for chargino–neutralino pair production in final states with three leptons and missing transverse momentum in √s=13 TeV pp collisions with the ATLAS detector

15. Measurements of W + W −+ ≥ 1 jet production cross-sections in pp collisions at √s = 13 TeV with the ATLAS detector

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15 results on '"Abusleme Hoffman, AC [0000-0003-0762-7204]"'

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