Measurements of Groomed-Jet Substructure of Charm Jets Tagged by D^{0} Mesons in Proton-Proton Collisions at sqrt[s]=13  TeV.

Journal: Physical Review Letters
Published:
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.

Authors
S Acharya, D Adamová, A Adler, G Aglieri Rinella, M Agnello, N Agrawal, Z Ahammed, S Ahmad, S Ahn, I Ahuja, A Akindinov, M Al Turany, D Aleksandrov, B Alessandro, H Alfanda, R Alfaro Molina, B Ali, Y Ali, A Alici, N Alizadehvandchali, A Alkin, J Alme, G Alocco, T Alt, I Altsybeev, M Anaam, C Andrei, A Andronic, V Anguelov, F Antinori, P Antonioli, C Anuj, N Apadula, L Aphecetche, H Appelshäuser, C Arata, S Arcelli, M Aresti, R Arnaldi, I Arsene, M Arslandok, A Augustinus, R Averbeck, M Azmi, A Badalà, Y Baek, X Bai, R Bailhache, Y Bailung, R Bala, A Balbino, A Baldisseri, B Balis, D Banerjee, Z Banoo, R Barbera, F Barile, L Barioglio, M Barlou, G Barnaföldi, L Barnby, V Barret, L Barreto, C Bartels, K Barth, E Bartsch, F Baruffaldi, N Bastid, S Basu, G Batigne, D Battistini, B Batyunya, D Bauri, J Bazo Alba, I Bearden, C Beattie, P Becht, D Behera, I Belikov, A D Bell Hechavarria, F Bellini, R Bellwied, S Belokurova, V Belyaev, G Bencedi, S Beole, A Bercuci, Y Berdnikov, A Berdnikova, L Bergmann, M Besoiu, L Betev, P Bhaduri, A Bhasin, M Bhat, B Bhattacharjee, L Bianchi, N Bianchi, J Bielčík, J Bielčíková, J Biernat, A Bigot, A Bilandzic, G Biro, S Biswas, N Bize, J Blair, D Blau, M Blidaru, N Bluhme, C Blume, G Boca, F Bock, T Bodova, A Bogdanov, S Boi, J Bok, L Boldizsár, A Bolozdynya, M Bombara, P Bond, G Bonomi, H Borel, A Borissov, H Bossi, E Botta, Y E Bouziani, L Bratrud, P Braun Munzinger, M Bregant, M Broz, G Bruno, M Buckland, D Budnikov, H Buesching, S Bufalino, O Bugnon, P Buhler, Z Buthelezi, J Butt, S Bysiak, M Cai, H Caines, A Caliva, E Calvo Villar, J Camacho, P Camerini, F D Canedo, M Carabas, F Carnesecchi, R Caron, J Castillo Castellanos, F Catalano, C Ceballos Sanchez, I Chakaberia, P Chakraborty, S Chandra, S Chapeland, M Chartier, S Chattopadhyay, T Chavez, T Cheng, C Cheshkov, B Cheynis, V Chibante Barroso, D Chinellato, E Chizzali, J Cho, S Cho, P Chochula, P Christakoglou, C Christensen, P Christiansen, T Chujo, M Ciacco, C Cicalo, L Cifarelli, F Cindolo, M Ciupek, G Clai, F Colamaria, J Colburn, D Colella, M Colocci, M Concas, G Conesa Balbastre, Z Conesa Del Valle, G Contin, J Contreras, M Coquet, T Cormier, P Cortese, M Cosentino, F Costa, S Costanza, J Crkovská, P Crochet, R Cruz Torres, E Cuautle, P Cui, L Cunqueiro, A Dainese, M Danisch, A Danu, P Das, S Das, A Dash, S Dash, R M David, A De Caro, G De Cataldo, J De Cuveland, A De Falco, D De Gruttola, N De Marco, C De Martin, S De Pasquale, S Deb, R Debski, K Deja, R Del Grande, L Dello Stritto, W Deng, P Dhankher, D Di Bari, A Di Mauro, R Diaz, T Dietel, Y Ding, R Divià, D Dixit, Djuvsland, U Dmitrieva, A Dobrin, B Dönigus, A Dubey, J Dubinski, A Dubla, S Dudi, P Dupieux, M Durkac, N Dzalaiova, T Eder, R Ehlers, V Eikeland, F Eisenhut, D Elia, B Erazmus, F Ercolessi, F Erhardt, M Ersdal, B Espagnon, G Eulisse, D Evans, S Evdokimov, L Fabbietti, M Faggin, J Faivre, F Fan, W Fan, A Fantoni, M Fasel, P Fecchio, A Feliciello, G Feofilov, A Fernández Téllez, M Ferrer, A Ferrero, C Ferrero, A Ferretti, J Feuillard, V Filova, D Finogeev, F Fionda, F Flor, A Flores, S Foertsch, I Fokin, S Fokin, E Fragiacomo, E Frajna, U Fuchs, N Funicello, C Furget, A Furs, T Fusayasu, J Gaardhøje, M Gagliardi, A Gago, C Galvan, D Gangadharan, P Ganoti, C Garabatos, J R Garcia, E Garcia Solis, K Garg, C Gargiulo, A Garibli, K Garner, A Gautam, M Gay Ducati, M Germain, C Ghosh, S Ghosh, M Giacalone, P Gianotti, P Giubellino, P Giubilato, A M Glaenzer, P Glässel, E Glimos, D J Goh, V Gonzalez, L González Trueba, M Gorgon, S Gotovac, V Grabski, L Graczykowski, E Grecka, A Grelli, C Grigoras, V Grigoriev, S Grigoryan, F Grosa, J Grosse Oetringhaus, R Grosso, D Grund, G Guardiano, R Guernane, M Guilbaud, K Gulbrandsen, T Gundem, T Gunji, W Guo, A Gupta, R Gupta, S Guzman, L Gyulai, M Habib, C Hadjidakis, H Hamagaki, M Hamid, Y Han, R Hannigan, M Haque, J Harris, A Harton, H Hassan, D Hatzifotiadou, P Hauer, L Havener, S Heckel, E Hellbär, H Helstrup, M Hemmer, T Herman, G Herrera Corral, F Herrmann, S Herrmann, K Hetland, B Heybeck, H Hillemanns, C Hills, B Hippolyte, B Hofman, B Hohlweger, J Honermann, G Hong, A Horzyk, R Hosokawa, Y Hou, P Hristov, C Hughes, P Huhn, L Huhta, C Hulse, T Humanic, H Hushnud, A Hutson, D Hutter, J Iddon, R Ilkaev, H Ilyas, M Inaba, G Innocenti, M Ippolitov, A Isakov, T Isidori, M Islam, M Ivanov, V Ivanov, V Izucheev, M Jablonski, B Jacak, N Jacazio, P Jacobs, S Jadlovska, J Jadlovsky, S Jaelani, L Jaffe, C Jahnke, M Jakubowska, M Janik, T Janson, M Jercic, O Jevons, A Jimenez, F Jonas, P Jones, J Jowett, J Jung, M Jung, A Junique, A Jusko, M Kabus, J Kaewjai, P Kalinak, A Kalteyer, A Kalweit, V Kaplin, A Karasu Uysal, D Karatovic, O Karavichev, T Karavicheva, P Karczmarczyk, E Karpechev, V Kashyap, U Kebschull, R Keidel, D Keijdener, M Keil, B Ketzer, A Khan, S Khan, A Khanzadeev, Y Kharlov, A Khatun, A Khuntia, B Kileng, B Kim, C Kim, D Kim, E Kim, J Kim, J Kim, J Kim, J Kim, M Kim, S Kim, T Kim, K Kimura, S Kirsch, I Kisel, S Kiselev, A Kisiel, J Kitowski, J Klay, J Klein, S Klein, C Klein Bösing, M Kleiner, T Klemenz, A Kluge, A Knospe, C Kobdaj, T Kollegger, A Kondratyev, E Kondratyuk, J Konig, S Konigstorfer, P Konopka, G Kornakov, S Koryciak, A Kotliarov, O Kovalenko, V Kovalenko, M Kowalski, I Králik, A Kravčáková, L Kreis, M Krivda, F Krizek, K Krizkova Gajdosova, M Kroesen, M Krüger, D Krupova, E Kryshen, V Kučera, C Kuhn, P Kuijer, T Kumaoka, D Kumar, L Kumar, N Kumar, S Kumar, S Kundu, P Kurashvili, A Kurepin, S Kushpil, J Kvapil, M Kweon, J Kwon, Y Kwon, S La Pointe, P La Rocca, Y Lai, A Lakrathok, M Lamanna, R Langoy, P Larionov, E Laudi, L Lautner, R Lavicka, T Lazareva, R Lea, G Legras, J Lehrbach, R Lemmon, I León Monzón, M Lesch, E Lesser, M Lettrich, P Lévai, X Li, X Li, J Lien, R Lietava, B Lim, S Lim, V Lindenstruth, A Lindner, C Lippmann, A Liu, D Liu, J Liu, I Lofnes, C Loizides, P Loncar, J Lopez, X Lopez, E López Torres, P Lu, J Luhder, M Lunardon, G Luparello, Y Ma, A Maevskaya, M Mager, T Mahmoud, A Maire, M Malaev, G Malfattore, N Malik, Q Malik, S Malik, L Malinina, D Mal'kevich, D Mallick, N Mallick, G Mandaglio, V Manko, F Manso, V Manzari, Y Mao, G Margagliotti, A Margotti, A Marín, C Markert, P Martinengo, J Martinez, M Martínez, G Martínez García, S Masciocchi, M Masera, A Masoni, L Massacrier, A Mastroserio, A Mathis, O Matonoha, P F Matuoka, A Matyja, C Mayer, A Mazuecos, F Mazzaschi, M Mazzilli, J Mdhluli, A Mechler, Y Melikyan, A Menchaca Rocha, E Meninno, A Menon, M Meres, S Mhlanga, Y Miake, L Micheletti, L Migliorin, D Mihaylov, K Mikhaylov, A Mishra, D Miśkowiec, A Modak, A Mohanty, B Mohanty, M Khan, M Molander, Z Moravcova, C Mordasini, D Moreira De Godoy, I Morozov, A Morsch, T Mrnjavac, V Muccifora, S Muhuri, J Mulligan, A Mulliri, M Munhoz, R Munzer, H Murakami, S Murray, L Musa, J Musinsky, J Myrcha, B Naik, R Nair, A Nambrath, B Nandi, R Nania, E Nappi, A Nassirpour, A Nath, C Nattrass, A Neagu, A Negru, L Nellen, S Nesbo, G Neskovic, D Nesterov, B Nielsen, E Nielsen, S Nikolaev, S Nikulin, V Nikulin, F Noferini, S Noh, P Nomokonov, J Norman, N Novitzky, P Nowakowski, A Nyanin, J Nystrand, M Ogino, A Ohlson, V Okorokov, J Oleniacz, A Oliveira Da Silva, M Oliver, A Onnerstad, C Oppedisano, A Ortiz Velasquez, A Oskarsson, J Otwinowski, M Oya, K Oyama, Y Pachmayer, S Padhan, D Pagano, G Paić, A Palasciano, S Panebianco, H Park, J Park, J Parkkila, R Patra, B Paul, H Pei, T Peitzmann, X Peng, M Pennisi, L Pereira, H Pereira Da Costa, D Peresunko, G Perez, S Perrin, Y Pestov, V Petráček, V Petrov, M Petrovici, R Pezzi, S Piano, M Pikna, P Pillot, O Pinazza, L Pinsky, C Pinto, S Pisano, M Płoskoń, M Planinic, F Pliquett, M Poghosyan, S Politano, N Poljak, A Pop, S Porteboeuf Houssais, J Porter, V Pozdniakov, S Prasad, S Prasad, R Preghenella, F Prino, C Pruneau, I Pshenichnov, M Puccio, S Pucillo, Z Pugelova, S Qiu, L Quaglia, R Quishpe, S Ragoni, A Rakotozafindrabe, L Ramello, F Rami, S A Ramirez, T Rancien, R Raniwala, S Raniwala, M Rasa, S Räsänen, R Rath, I Ravasenga, K Read, C Reckziegel, A Redelbach, K Redlich, A Rehman, F Reidt, H Reme Ness, Z Rescakova, K Reygers, A Riabov, V Riabov, R Ricci, T Richert, M Richter, A Riedel, W Riegler, F Riggi, C Ristea, M Rodríguez Cahuantzi, K Røed, R Rogalev, E Rogochaya, T Rogoschinski, D Rohr, D Röhrich, P Rojas, S Rojas Torres, P Rokita, G Romanenko, F Ronchetti, A Rosano, E Rosas, A Rossi, A Roy, P Roy, S Roy, N Rubini, O Rueda, D Ruggiano, R Rui, B Rumyantsev, P Russek, R Russo, A Rustamov, E Ryabinkin, Y Ryabov, A Rybicki, H Rytkonen, W Rzesa, O A Saarimaki, R Sadek, S Sadhu, S Sadovsky, J Saetre, K Šafařík, S Saha, B Sahoo, R Sahoo, S Sahoo, D Sahu, P Sahu, J Saini, K Sajdakova, S Sakai, M Salvan, S Sambyal, T Saramela, D Sarkar, N Sarkar, P Sarma, V Sarritzu, V Sarti, M H Sas, J Schambach, H Scheid, C Schiaua, R Schicker, A Schmah, C Schmidt, H Schmidt, M Schmidt, M Schmidt, N Schmidt, A Schmier, R Schotter, J Schukraft, K Schwarz, K Schweda, G Scioli, E Scomparin, J Seger, Y Sekiguchi, D Sekihata, I Selyuzhenkov, S Senyukov, J Seo, D Serebryakov, L Šerkšnytė, A Sevcenco, T Shaba, A Shabetai, R Shahoyan, A Shangaraev, A Sharma, D Sharma, H Sharma, M Sharma, N Sharma, S Sharma, S Sharma, U Sharma, A Shatat, O Sheibani, K Shigaki, M Shimomura, S Shirinkin, Q Shou, Y Sibiriak, S Siddhanta, T Siemiarczuk, T Silva, D Silvermyr, T Simantathammakul, R Simeonov, B Singh, B Singh, R Singh, R Singh, S Singh, V Singh, V Singhal, T Sinha, B Sitar, M Sitta, T Skaali, G Skorodumovs, M Slupecki, N Smirnov, R J Snellings, E Solheim, J Song, A Songmoolnak, F Soramel, S Sorensen, R Spijkers, I Sputowska, J Staa, J Stachel, I Stan, P Steffanic, S Stiefelmaier, D Stocco, I Storehaug, M Storetvedt, P Stratmann, S Strazzi, C Stylianidis, A Suaide, C Suire, M Sukhanov, M Suljic, V Sumberia, S Sumowidagdo, S Swain, I Szarka, U Tabassam, S Taghavi, G Taillepied, J Takahashi, G Tambave, S Tang, Z Tang, J Tapia Takaki, N Tapus, L Tarasovicova, M Tarzila, G Tassielli, A Tauro, A Telesca, L Terlizzi, C Terrevoli, G Tersimonov, S Thakur, D Thomas, A Tikhonov, A Timmins, M Tkacik, T Tkacik, A Toia, R Tokumoto, N Topilskaya, M Toppi, F Torales Acosta, T Tork, A Torres Ramos, A Trifiró, A Triolo, S Tripathy, T Tripathy, S Trogolo, V Trubnikov, W Trzaska, T Trzcinski, R Turrisi, T Tveter, K Ullaland, B Ulukutlu, A Uras, M Urioni, G Usai, M Vala, N Valle, S Vallero, L Van Doremalen, M Van Leeuwen, C Van Veen, R J Van Weelden, P Vande Vyvre, D Varga, Z Varga, M Varga Kofarago, M Vasileiou, A Vasiliev, O Vázquez Doce, V Vechernin, E Vercellin, S Vergara Limón, L Vermunt, R Vértesi, M Verweij, L Vickovic, Z Vilakazi, O Villalobos Baillie, G Vino, A Vinogradov, T Virgili, V Vislavicius, A Vodopyanov, B Volkel, M Völkl, K Voloshin, S Voloshin, G Volpe, B Von Haller, I Vorobyev, N Vozniuk, J Vrláková, B Wagner, C Wang, D Wang, A Wegrzynek, F Weiglhofer, S Wenzel, J Wessels, S Weyhmiller, J Wiechula, J Wikne, G Wilk, J Wilkinson, G Willems, B Windelband, M Winn, J Wright, W Wu, Y Wu, R Xu, A Yadav, A Yadav, S Yalcin, Y Yamaguchi, K Yamakawa, S Yang, S Yano, Z Yin, I-k Yoo, J Yoon, S Yuan, A Yuncu, V Zaccolo, C Zampolli, H J Zanoli, F Zanone, N Zardoshti, A Zarochentsev, P Závada, N Zaviyalov, M Zhalov, B Zhang, S Zhang, X Zhang, Y Zhang, Z Zhang, M Zhao, V Zherebchevskii, Y Zhi, N Zhigareva, D Zhou, Y Zhou, J Zhu, Y Zhu, G Zinovjev, N Zurlo