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POLITECNICO DI BARI - Catalogo dei prodotti della Ricerca
The transverse-momentum (pT) spectra and coalescence parameters B-2 of (anti)deuterons are measured ffiffiin p-p collisions at vs = 13 TeV for the first time in and out of jets. In this measurement, the direction of the leading particle with the highest pT in the event (p(T)(lead) > 5 GeV/c) is used as an approximation for the jet axis. The event is consequently divided into three azimuthal regions, and the jet signal is obtained as the difference between the toward region, that contains jet fragmentation products in addition to the underlying event (UE), and the transverse region, which is dominated by the UE. The coalescence parameter in the jet is found to be approximately a factor of 10 larger than that in the underlying event. This experimental observation is consistent with the coalescence picture and can be attributed to the smaller average phase -space distance between nucleons in the jet cone as compared with the underlying event. The results presented in this Letter are compared to predictions from a simple nucleon coalescence model, where the phase-space distributions of nucleons are generated using PYTHIA8 with the Monash 2013 tuning, and to predictions from a deuteron production model based on ordinary nuclear reactions with parametrized energy-dependent cross sections tuned on data. The latter model is implemented in PYTHIA8.3. Both models reproduce the observed large difference between in-jet and out-of-jet coalescence parameters, although the almost flat trend of the B-Jet (2) is not reproduced by the models, which instead give a decreasing trend.
Enhanced Deuteron Coalescence Probability in Jets / Acharya, S; Adamová, D; Adler, A; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, S U; Ahuja, I; Akindinov, A; Al-Turany, M; Aleksandrov, D; Alessandro, B; Alfanda, H M; Alfaro Molina, R; Ali, B; Alici, A; Alizadehvandchali, N; Alkin, A; Alme, J; Alocco, G; Alt, T; Altsybeev, I; Anaam, M N; Andrei, C; Andronic, A; Anguelov, V; Antinori, F; Antonioli, P; Apadula, N; Aphecetche, L; Appelshäuser, H; Arata, C; Arcelli, S; Aresti, M; Arnaldi, R; Arneiro, J G M C A; Arsene, I C; Arslandok, M; Augustinus, A; Averbeck, R; Azmi, M D; Badalà, A; Bae, J; Baek, Y W; Bai, X; Bailhache, R; Bailung, Y; Balbino, A; Baldisseri, A; Balis, B; Banerjee, D; Banoo, Z; Barbera, R; Barile, F; Barioglio, L; Barlou, M; Barnaföldi, G G; Barnby, L S; Barret, V; Barreto, L; Bartels, C; Barth, K; Bartsch, E; Bastid, N; Basu, S; Batigne, G; Battistini, D; Batyunya, B; Bauri, D; Bazo Alba, J L; Bearden, I G; Beattie, C; Becht, P; Behera, D; Belikov, I; Bell Hechavarria, A D C; Bellini, F; Bellwied, R; Belokurova, S; Belyaev, V; Bencedi, G; Beole, S; Bercuci, A; Berdnikov, Y; Berdnikova, A; Bergmann, L; Besoiu, M G; Betev, L; Bhaduri, P P; Bhasin, A; Bhat, M A; Bhattacharjee, B; Bianchi, L; Bianchi, N; Bielčík, J; Bielčíková, J; Biernat, J; Bigot, A P; Bilandzic, A; Biro, G; Biswas, S; Bize, N; Blair, J T; Blau, D; Blidaru, M B; Bluhme, N; Blume, C; Boca, G; Bock, F; Bodova, T; Bogdanov, A; Boi, S; Bok, J; Boldizsár, L; Bolozdynya, A; Bombara, M; Bond, P M; Bonomi, G; Borel, H; Borissov, A; Borquez Carcamo, A G; Bossi, H; Botta, E; Bouziani, Y E M; Bratrud, L; Braun-Munzinger, P; Bregant, M; Broz, M; Bruno, G E; Buckland, M D; Budnikov, D; Buesching, H; Bufalino, S; Bugnon, O; Buhler, P; Buthelezi, Z; Bysiak, S A; Cai, M; Caines, H; Caliva, A; Calvo Villar, E; Camacho, J M M; Camerini, P; Canedo, F D M; Carabas, M; Carballo, A A; Carnesecchi, F; Caron, R; Carvalho, L A D; Castillo Castellanos, J; Catalano, F; Ceballos Sanchez, C; Chakaberia, I; 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[10.1103/PhysRevLett.131.042301]
Enhanced Deuteron Coalescence Probability in Jets
Acharya, S;Adamová, D;Adler, A;Aglieri Rinella, G;Agnello, M;Agrawal, N;Ahammed, Z;Ahmad, S;Ahn, S U;Ahuja, I;Akindinov, A;Al-Turany, M;Aleksandrov, D;Alessandro, B;Alfanda, H M;Alfaro Molina, R;Ali, B;Alici, A;Alizadehvandchali, N;Alkin, A;Alme, J;Alocco, G;Alt, T;Altsybeev, I;Anaam, M N;Andrei, C;Andronic, A;Anguelov, V;Antinori, F;Antonioli, P;Apadula, N;Aphecetche, L;Appelshäuser, H;Arata, C;Arcelli, S;Aresti, M;Arnaldi, R;Arneiro, J G M C A;Arsene, I C;Arslandok, M;Augustinus, A;Averbeck, R;Azmi, M D;Badalà, A;Bae, J;Baek, Y W;Bai, X;Bailhache, R;Bailung, Y;Balbino, A;Baldisseri, A;Balis, B;Banerjee, D;Banoo, Z;Barbera, R;Barile, F;Barioglio, L;Barlou, M;Barnaföldi, G G;Barnby, L S;Barret, V;Barreto, L;Bartels, C;Barth, K;Bartsch, E;Bastid, N;Basu, S;Batigne, G;Battistini, D;Batyunya, B;Bauri, D;Bazo Alba, J L;Bearden, I G;Beattie, C;Becht, P;Behera, D;Belikov, I;Bell Hechavarria, A D C;Bellini, F;Bellwied, R;Belokurova, S;Belyaev, V;Bencedi, G;Beole, S;Bercuci, A;Berdnikov, 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2023-01-01
Abstract
The transverse-momentum (pT) spectra and coalescence parameters B-2 of (anti)deuterons are measured ffiffiin p-p collisions at vs = 13 TeV for the first time in and out of jets. In this measurement, the direction of the leading particle with the highest pT in the event (p(T)(lead) > 5 GeV/c) is used as an approximation for the jet axis. The event is consequently divided into three azimuthal regions, and the jet signal is obtained as the difference between the toward region, that contains jet fragmentation products in addition to the underlying event (UE), and the transverse region, which is dominated by the UE. The coalescence parameter in the jet is found to be approximately a factor of 10 larger than that in the underlying event. This experimental observation is consistent with the coalescence picture and can be attributed to the smaller average phase -space distance between nucleons in the jet cone as compared with the underlying event. The results presented in this Letter are compared to predictions from a simple nucleon coalescence model, where the phase-space distributions of nucleons are generated using PYTHIA8 with the Monash 2013 tuning, and to predictions from a deuteron production model based on ordinary nuclear reactions with parametrized energy-dependent cross sections tuned on data. The latter model is implemented in PYTHIA8.3. Both models reproduce the observed large difference between in-jet and out-of-jet coalescence parameters, although the almost flat trend of the B-Jet (2) is not reproduced by the models, which instead give a decreasing trend.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/262886
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.