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Understanding the role of parton mass and Casimir color factors in the quantum chromodynamics parton shower represents an important step in characterizing the emission properties of heavy quarks. Recent experimental advances in jet substructure techniques have provided the opportunity to isolate and characterize gluon emissions from heavy quarks. In this Letter, the first direct experimental constraint on the charm-quark splitting function is presented, obtained via the measurement of the groomed shared momentum fraction of the first splitting in charm jets, tagged by a reconstructed D^{0} meson. The measurement is made in proton-proton collisions at sqrt[s]=13 TeV, in the low jet transverse-momentum interval of 15≤p_{T}^{jet ch}<30 GeV/c where the emission properties are sensitive to parton mass effects. In addition, the opening angle of the first perturbative emission of the charm quark, as well as the number of perturbative emissions it undergoes, is reported. Comparisons to measurements of an inclusive-jet sample show a steeper splitting function for charm quarks compared with gluons and light quarks. Charm quarks also undergo fewer perturbative emissions in the parton shower, with a reduced probability of large-angle emissions.
Measurements of Groomed-Jet Substructure of Charm Jets Tagged by D^{0} Mesons in Proton-Proton Collisions at sqrt[s]=13 TeV
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;Ali, Y;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;Anuj, C;Apadula, N;Aphecetche, L;Appelshäuser, H;Arata, C;Arcelli, S;Aresti, M;Arnaldi, R;Arsene, I C;Arslandok, M;Augustinus, A;Averbeck, R;Azmi, M D;Badalà, A;Baek, Y W;Bai, X;Bailhache, R;Bailung, Y;Bala, R;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;Baruffaldi, F;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, 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P;Christakoglou, P;Christensen, C H;Christiansen, P;Chujo, T;Ciacco, M;Cicalo, C;Cifarelli, L;Cindolo, F;Ciupek, M R;Clai, G;Colamaria, F;Colburn, J S;Colella, D;Colocci, M;Concas, M;Conesa Balbastre, G;Conesa Del Valle, Z;Contin, G;Contreras, J G;Coquet, M L;Cormier, T M;Cortese, P;Cosentino, M R;Costa, F;Costanza, S;Crkovská, J;Crochet, P;Cruz-Torres, R;Cuautle, E;Cui, P;Cunqueiro, L;Dainese, A;Danisch, M C;Danu, A;Das, P;Das, P;Das, S;Dash, A R;Dash, S;David, R M H;De Caro, A;de Cataldo, G;de Cuveland, J;De Falco, A;De Gruttola, D;De Marco, N;De Martin, C;De Pasquale, S;Deb, S;Debski, R J;Deja, K R;Del Grande, R;Dello Stritto, L;Deng, W;Dhankher, P;Di Bari, D;Di Mauro, A;Diaz, R A;Dietel, T;Ding, Y;Divià, R;Dixit, D U;Djuvsland, Ø;Dmitrieva, U;Dobrin, A;Dönigus, B;Dubey, A K;Dubinski, J M;Dubla, A;Dudi, S;Dupieux, P;Durkac, M;Dzalaiova, N;Eder, T M;Ehlers, R J;Eikeland, V N;Eisenhut, F;Elia, D;Erazmus, B;Ercolessi, F;Erhardt, F;Ersdal, M R;Espagnon, B;Eulisse, G;Evans, D;Evdokimov, 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2023-01-01
Abstract
Understanding the role of parton mass and Casimir color factors in the quantum chromodynamics parton shower represents an important step in characterizing the emission properties of heavy quarks. Recent experimental advances in jet substructure techniques have provided the opportunity to isolate and characterize gluon emissions from heavy quarks. In this Letter, the first direct experimental constraint on the charm-quark splitting function is presented, obtained via the measurement of the groomed shared momentum fraction of the first splitting in charm jets, tagged by a reconstructed D^{0} meson. The measurement is made in proton-proton collisions at sqrt[s]=13 TeV, in the low jet transverse-momentum interval of 15≤p_{T}^{jet ch}<30 GeV/c where the emission properties are sensitive to parton mass effects. In addition, the opening angle of the first perturbative emission of the charm quark, as well as the number of perturbative emissions it undergoes, is reported. Comparisons to measurements of an inclusive-jet sample show a steeper splitting function for charm quarks compared with gluons and light quarks. Charm quarks also undergo fewer perturbative emissions in the parton shower, with a reduced probability of large-angle emissions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1945715
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simulazione ASN
Il report seguente simula gli indicatori relativi alla 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 presenta gli indicatori calcolati alla data indicata sul report. Si ricorda che in sede di domanda ASN presso il MIUR gli indicatori saranno invece calcolati a partire dal 1° gennaio rispettivamente del quinto/decimo/quindicesimo anno precedente la scadenza del quadrimestre di presentazione della domanda (art 2 del DM 598/2018).
In questa simulazione pertanto il valore degli indicatori potrà differire da quello conteggiato all’atto della domanda ASN effettuata presso il MIUR a seguito di:
Correzioni imputabili a eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori.
Presenza di eventuali errori di catalogazione e/o dati mancanti in IRIS
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Variabilità della finestra temporale considerata in funzione della sessione di domanda ASN a cui si partecipa.
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