Comparison of Fragmentation Functions for Jets Dominated by Light Quarks and Gluons from pp and Pb+Pb Collisions in ATLAS.
Physical review letters 123:4 (2019) 042001
Authors:
M Aaboud, G Aad, B Abbott, O Abdinov, B Abeloos, DK Abhayasinghe, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, S Adachi, L Adamczyk, J Adelman, M Adersberger, A Adiguzel, T Adye, AA Affolder, Y Afik, C Agheorghiesei, JA Aguilar-Saavedra, F Ahmadov, G Aielli, S Akatsuka, TPA Åkesson, E Akilli, AV Akimov, GL Alberghi, J Albert, P Albicocco, MJ Alconada Verzini, S Alderweireldt, M Aleksa, IN Aleksandrov, C Alexa, T Alexopoulos, M Alhroob, B Ali, G Alimonti, J Alison, SP Alkire, C Allaire, BMM Allbrooke, BW Allen, PP Allport, A Aloisio, A Alonso, F Alonso, C Alpigiani, AA Alshehri, MI Alstaty, B Alvarez Gonzalez, D Álvarez Piqueras, MG Alviggi, BT Amadio, Y Amaral Coutinho, L Ambroz, C Amelung, D Amidei, SP Amor Dos Santos, S Amoroso, CS Amrouche, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, JK Anders, KJ Anderson, A Andreazza, V Andrei, CR Anelli, S Angelidakis, I Angelozzi, A Angerami, AV Anisenkov, A Annovi, C Antel, MT Anthony, M Antonelli, DJA Antrim, F Anulli, M Aoki, JA Aparisi Pozo, L Aperio Bella, G Arabidze, JP Araque, V Araujo Ferraz, R Araujo Pereira, ATH Arce, RE Ardell, FA Arduh, J-F Arguin, S Argyropoulos, AJ Armbruster, LJ Armitage, A Armstrong, O Arnaez, H Arnold, M Arratia, O Arslan, A Artamonov, G Artoni, S Artz, S Asai, N Asbah, A Ashkenazi, EM Asimakopoulou, L Asquith, K Assamagan, R Astalos, RJ Atkin, M Atkinson, NB Atlay, K Augsten, G Avolio, R Avramidou, MK Ayoub, G Azuelos, AE Baas, MJ Baca, H Bachacou, K Bachas, M Backes, P Bagnaia, M Bahmani, H Bahrasemani, AJ Bailey, JT Baines, M Bajic, C Bakalis, OK Baker, PJ Bakker, D Bakshi Gupta, EM Baldin, P Balek, F Balli, WK Balunas, J Balz, E Banas, A Bandyopadhyay, S Banerjee, AAE Bannoura, L Barak, WM Barbe, EL Barberio, D Barberis, M Barbero, T Barillari, M-S Barisits, J Barkeloo, T Barklow, N Barlow, R Barnea, SL Barnes, BM Barnett, RM Barnett, Z Barnovska-Blenessy, A Baroncelli, G Barone, AJ Barr, L Barranco Navarro, F Barreiro, J Barreiro Guimarães da Costa, R Bartoldus, AE Barton, P Bartos, A Basalaev, A Bassalat, RL Bates, SJ Batista, S Batlamous, JR Batley, M Battaglia, M Bauce, F Bauer, KT Bauer, HS Bawa, JB Beacham, T Beau, PH Beauchemin, P Bechtle, HC Beck, HP Beck, K Becker, M Becker, C Becot, A Beddall, AJ Beddall, VA Bednyakov, M Bedognetti, CP Bee, TA Beermann, M Begalli, M Begel, A Behera, JK Behr, AS Bell, G Bella, L Bellagamba, A Bellerive, M Bellomo, P Bellos, K Belotskiy, NL Belyaev, O Benary, D Benchekroun, M Bender, N Benekos, Y Benhammou, E Benhar Noccioli, J Benitez, DP Benjamin, M Benoit, JR Bensinger, S Bentvelsen, L Beresford, M Beretta, D Berge, E Bergeaas Kuutmann, N Berger, LJ Bergsten, J Beringer, S Berlendis, NR Bernard, G Bernardi, C Bernius, FU Bernlochner, T Berry, P Berta, C Bertella, G Bertoli, IA Bertram, GJ Besjes, O Bessidskaia Bylund, M Bessner, N Besson, A Bethani, S Bethke, A Betti, AJ Bevan, J Beyer, RM Bianchi, O Biebel, D Biedermann, R Bielski, K Bierwagen, NV Biesuz, M Biglietti, TRV Billoud, M Bindi, A Bingul, C Bini, S Biondi, M Birman, T Bisanz, JP Biswal, C Bittrich, DM Bjergaard, JE Black, KM Black, T Blazek, I Bloch, C Blocker, A Blue, U Blumenschein, Dr Blunier, GJ Bobbink, VS Bobrovnikov, SS Bocchetta, A Bocci, D Boerner, D Bogavac, AG Bogdanchikov, C Bohm, V Boisvert, P Bokan, T Bold, AS Boldyrev, AE Bolz, M Bomben, M Bona, JS Bonilla, M Boonekamp, A Borisov, G Borissov, J Bortfeldt, D Bortoletto, V Bortolotto, D Boscherini, M Bosman, JD Bossio Sola, K Bouaouda, J Boudreau, EV Bouhova-Thacker, D Boumediene, C Bourdarios, SK Boutle, A Boveia, J Boyd, D Boye, IR Boyko, AJ Bozson, J Bracinik, N Brahimi, A Brandt, G Brandt, O Brandt, F Braren, U Bratzler, B Brau, JE Brau, WD Breaden Madden, K Brendlinger, AJ Brennan, L Brenner, R Brenner, S Bressler, B Brickwedde, DL Briglin, D Britton, D Britzger, I Brock, R Brock, G Brooijmans, T Brooks, WK Brooks, E Brost, JH Broughton, PA Bruckman de Renstrom, D Bruncko, A Bruni, G Bruni, LS Bruni, S Bruno, BH Brunt, M Bruschi, N Bruscino, P Bryant, L Bryngemark, T Buanes, Q Buat, P Buchholz, AG Buckley, IA Budagov, MK Bugge, F Bührer, O Bulekov, D Bullock, TJ Burch, S Burdin, CD Burgard, AM Burger, B Burghgrave, K Burka, S Burke, I Burmeister, JTP Burr, D Büscher, V Büscher, E Buschmann, P Bussey, JM Butler, CM Buttar, JM Butterworth, P Butti, W Buttinger, A Buzatu, AR Buzykaev, G Cabras, S Cabrera Urbán, D Caforio, H Cai, VMM Cairo, O Cakir, N Calace, P Calafiura, A Calandri, G Calderini, P Calfayan, G Callea, LP Caloba, S Calvente Lopez, D Calvet, S Calvet, TP Calvet, M Calvetti, R Camacho Toro, S Camarda, P Camarri, D Cameron, R Caminal Armadans, C Camincher, S Campana, M Campanelli, A Camplani, A Campoverde, V Canale, M Cano Bret, J Cantero, T Cao, Y Cao, MDM Capeans Garrido, I Caprini, M Caprini, M Capua, RM Carbone, R Cardarelli, FC Cardillo, I Carli, T Carli, G Carlino, BT Carlson, L Carminati, RMD Carney, S Caron, E Carquin, S Carrá, GD Carrillo-Montoya, D Casadei, MP Casado, AF Casha, DW Casper, R Castelijn, FL Castillo, V Castillo Gimenez, NF Castro, A Catinaccio, JR Catmore, A Cattai, J Caudron, V Cavaliere, E Cavallaro, D Cavalli, M Cavalli-Sforza, V Cavasinni, E Celebi, F Ceradini, L Cerda Alberich, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, A Cervelli, SA Cetin, A Chafaq, D Chakraborty, SK Chan, WS Chan, YL Chan, JD Chapman, B Chargeishvili, DG Charlton, CC Chau, CA Chavez Barajas, S Che, A Chegwidden, S Chekanov, SV Chekulaev, GA Chelkov, MA Chelstowska, C Chen, CH Chen, H Chen, J Chen, J Chen, S Chen, SJ Chen, X Chen, Y Chen, Y-H Chen, HC Cheng, HJ Cheng, A Cheplakov, E Cheremushkina, R Cherkaoui El Moursli, E Cheu, K Cheung, L Chevalier, V Chiarella, G Chiarelli, G Chiodini, AS Chisholm, A Chitan, I Chiu, YH Chiu, MV Chizhov, K Choi, AR Chomont, S Chouridou, YS Chow, V Christodoulou, MC Chu, J Chudoba, AJ Chuinard, JJ Chwastowski, L Chytka, D Cinca, V Cindro, IA Cioară, A Ciocio, F Cirotto, ZH Citron, M Citterio, A Clark, MR Clark, PJ Clark, C 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A De Salvo, U De Sanctis, A De Santo, K De Vasconcelos Corga, JB De Vivie De Regie, C Debenedetti, DV Dedovich, N Dehghanian, M Del Gaudio, J Del Peso, Y Delabat Diaz, D Delgove, F Deliot, CM Delitzsch, M Della Pietra, D Della Volpe, A Dell'Acqua, L Dell'Asta, M Delmastro, C Delporte, PA Delsart, DA DeMarco, S Demers, M Demichev, SP Denisov, D Denysiuk, L D'Eramo, D Derendarz, JE Derkaoui, F Derue, P Dervan, K Desch, C Deterre, K Dette, MR Devesa, PO Deviveiros, A Dewhurst, S Dhaliwal, FA Di Bello, A Di Ciaccio, L Di Ciaccio, WK Di Clemente, C Di Donato, A Di Girolamo, B Di Micco, R Di Nardo, KF Di Petrillo, R Di Sipio, D Di Valentino, C Diaconu, M Diamond, FA Dias, T Dias Do Vale, MA Diaz, J Dickinson, EB Diehl, J Dietrich, S Díez Cornell, A Dimitrievska, J Dingfelder, F Dittus, F Djama, T Djobava, JI Djuvsland, MAB Do Vale, M Dobre, D Dodsworth, C Doglioni, J Dolejsi, Z Dolezal, M Donadelli, J Donini, A D'onofrio, M D'Onofrio, J Dopke, A Doria, MT Dova, AT Doyle, E Drechsler, E 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Zambito, D Zanzi, DR Zaripovas, SV Zeißner, C Zeitnitz, G Zemaityte, JC Zeng, Q Zeng, O Zenin, D Zerwas, M Zgubič, DF Zhang, D Zhang, F Zhang, G Zhang, H Zhang, J Zhang, L Zhang, L Zhang, M Zhang, P Zhang, R Zhang, R Zhang, X Zhang, Y Zhang, Z Zhang, P Zhao, X Zhao, Y Zhao, Z Zhao, A Zhemchugov, B Zhou, C Zhou, L Zhou, MS Zhou, M Zhou, N Zhou, Y Zhou, CG Zhu, HL Zhu, H Zhu, J Zhu, Y Zhu, X Zhuang, K Zhukov, V Zhulanov, A Zibell, D Zieminska, NI Zimine, S Zimmermann, Z Zinonos, M Zinser, M Ziolkowski, G Zobernig, A Zoccoli, K Zoch, TG Zorbas, R Zou, M Zur Nedden, L Zwalinski, ATLAS Collaboration
Abstract:
Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25 pb^{-1} of pp and 0.49 nb^{-1} of Pb+Pb collision data at 5.02 TeV per nucleon pair recorded with the ATLAS detector at the Large Hadron Collider. The measurements are compared to predictions of Monte Carlo generators and to measurements of inclusively selected jets. In pp collisions, a different jet fragmentation function in photon-tagged events from that in inclusive jet events arises from the difference in fragmentation between light quarks and gluons. The ratios of the fragmentation functions in Pb+Pb events to that in pp events are used to explore the parton color-charge dependence of jet quenching in the hot medium. In relatively peripheral collisions, fragmentation functions exhibit a similar modification pattern for photon-tagged and inclusive jets. However, photon-tagged jets are observed to have larger modifications than inclusive jets in central Pb+Pb events.
