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Measurement of J/ψ-pair production in pp collisions at √s=13 TeV and study of gluon transverse-momentum dependent PDFs

Title:	Measurement of J/ψ-pair production in pp collisions at √s=13 TeV and study of gluon transverse-momentum dependent PDFs
Authors:	Aaij, R; Abdelmotteleb, ASW; Beteta, CA; Abudinén, F; Ackernley, T; Adeva, B; Adinolfi, M; Adlarson, P; Afsharnia, H; Agapopoulou, C; Aidala, CA; Ajaltouni, Z; Akar, S; Akiba, K; Albicocco, P; Albrecht, J; Alessio, F; Alexander, M; Albero, AA; Aliouche, Z; Cartelle, PA; Amalric, R; Amato, S; Amey, JL; Amhis, Y; An, L; Anderlini, L; Andersson, M; Andreianov, A; Andreola, P; Andreotti, M; Andreou, D; Anelli, A; Ao, D; Archilli, F; Cuendis, SA; Artamonov, A; Artuso, M; Aslanides, E; Atzeni, M; Audurier, B; Bacher, D; Perea, IB; Bachmann, S; Bachmayer, M; Back, JJ; Bailly-reyre, A; Rodriguez, PB; Balagura, V; Baldini, W; Leite, JBD; Barbetti, M; Barbosa, IR; Barlow, RJ; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, JM; Bassi, G; Batsukh, B; Battig, A; Bay, A; Beck, A; Becker, M; Bedeschi, F; Bediaga, IB; Beiter, A; Belin, S; Bellee, V; Belous, K; Belov, I; Belyaev, I; Benane, G; Bencivenni, G; Ben-Haim, E; Berezhnoy, A; Bernet, R; Andres, SB; Bernstein, HC; Bertella, C; Bertolin, A; Betancourt, C; Betti, F; Bex, J; Bezshyiko, I; Bhom, J; Bieker, MS; Biesuz, NV; Billoir, P; Biolchini, A; Birch, M; Bishop, FCR; Bitadze, A; Bizzeti, A; Blago, MP; Blake, T; Blanc, F; Blank, JE; Blusk, S; Bobulska, D; Bocharnikov, V; Boelhauve, JA; Garcia, OB; Boettcher, T; Bohare, A; Boldyrev, A; Bolognani, CS; Bolzonella, R; Bondar, N; Borgato, F; Borghi, S; Borsato, M; Borsuk, JT; Bouchiba, SA; Bowcock, TJV; Boyer, A; Bozzi, C; Bradley, MJ; Braun, S; Rodriguez, AB; Breer, N; Brodzicka, J; Brossa Gonzalo, A; Brown, J; Brundu, D; Buonaura, A; Buonincontri, L; Burke, AT; Burr, C; Bursche, A; Butkevich, A; Butter, JS; Buytaert, J; Byczynski, W; Cadeddu, S; Cai, H; Calabrese, R; Calefice, L; Cali, S; Calvi, M; Gomez, MC; Bouzas, JC; Campana, P; Campora Perez, DH; Quezada, AFC; Capelli, S; Capriotti, L; Carbone, A; Salgado, LC; Cardinale, R; Cardini, A; Carniti, P; Carus, L; Vidal, AC; Caspary, R; Casse, G; Godinez, JC; Cattaneo, M; Cavallero, G; Cavallini, V; Celani, S; Cerasoli, J; Cervenkov, D; Cesare, S; Chadwick, AJ; Chahrour, I; Charles, M; Charpentier, P; Barajas, CAC; Chefdeville, M; Chen, C; Chen, S; Chernov, A; Chernyshenko, S; Chobanova, V; Cholak, S; Chrzaszcz, M; Chubykin, A; Chulikov, V; Ciambrone, P; Cicala, MF; Vidal, XC; Ciezarek, G; Cifra, P; Clarke, PEL; Clemencic, M; Cliff, HV; Closier, J; Cobbledick, JL; Toapaxi, CC; Coco, V; Cogan, J; Cogneras, E; Cojocariu, L; Collins, P; Colombo, T; Comerma-Montells, A; Congedo, L; Contu, A; Cooke, N; Corredoira, I; Correia, A; Corti, G; Meldrum, JJC; Couturier, B; Craik, DC; Torres, MC; Currie, R; Da Silva, CL; Dadabaev, S; Dai, L; Dai, X; Dall'Occo, E; Dalseno, J; D'Ambrosio, C; Daniel, J; Danilina, A; d'Argent, P; Davidson, A; Davies, JE; Davis, A; Francisco, OD; De Angelis, C; de Boer, J; De Bruyn, K; De Capua, S; De Cian, M; Da Graca, UDC; De Lucia, E; De Miranda, JM; De Paula, L; De Serio, M; De Simone, D; De Simone, P; De Vellis, F; de Vries, JA; Debernardis, F; Decamp, D; Dedu, V; Del Buono, L; Delaney, B; Dembinski, H-P; Deng, J; Denysenko, V; Deschamps, O; Dettori, F; Dey, B; Di Nezza, P; Diachkov, I; Didenko, S; Ding, S; Dobishuk, V; Docheva, AD; Dolmatov, A; Dong, C; Donohoe, AM; Dordei, F; dos Reis, AC; Douglas, L; Downes, AG; Duan, W; Duda, P; Dudek, MW; Dufour, L; Duk, V; Durante, P; Duras, MM; Durham, JM; Dutta, D; Dziurda, A; Dzyuba, A; Easo, S; Eckstein, E; Egede, U; Egorychev, A; Egorychev, V; Eirea Orro, C; Eisenhardt, S; Ejopu, E; Ek-In, S; Eklund, L; Elashri, M; Ellbracht, J; Ely, S; Ene, A; Epple, E; Escher, S; Eschle, J; Esen, S; Evans, T; Fabiano, F; Falcao, LN; Fan, Y; Fang, B; Fantini, L; Faria, M; Farmer, K; Fazzini, D; Felkowski, L; Feng, M; Feo, M; Gomez, MF; Fernez, AD; Ferrari, F; Rodrigues, FF; Sole, SF; Ferrillo, M; Ferro-Luzzi, M; Filippov, S; Fini, RA; Fiorini, M; Firlej, M; Fischer, KM; Fitzgerald, DS; Fitzpatrick, C; Fiutowski, T; Fleuret, F; Fontana, M; Fontanelli, F; Foreman, LF; Forty, R; Foulds-Holt, D; Franco Sevilla, M; Frank, M; Franzoso, E; Frau, G; Frei, C; Friday, DA; Frontini, L; Fu, J; Fuehring, Q; Fujii, Y; Fulghesu, T; Gabriel, E; Galati, G; Galati, MD; Gallas Torreira, A; Galli, D; Gambetta, S; Gandelman, M; Gandini, P; Gao, H; Gao, R; Gao, Y; Garau, M; Martin, LMG; Moreno, PG; Pardiñas, JG; Plana, BG; Garg, KG; Garrido, L; Gaspar, C; Geertsema, RE; Gerken, LL; Gersabeck, E; Gersabeck, M; Gershon, T; Ghorbanimoghaddam, Z; Giambastiani, L; Giasemis, FI; Gibson, V; Giemza, HK; Gilman, AL; Giovannetti, M; Gioventù, A; Gironell, PG; Giugliano, C; Giza, MA; Gkougkousis, EL; Glaser, FC; Gligorov, VV; Göbel, C; Golobardes, E; Golubkov, D; Golutvin, A; Gomes, A; Fernandez, SG; Abrantes, FG; Goncerz, M; Gong, G; Gooding, JA; Gorelov, IV; Gotti, C; Grabowski, JP; Cardoso, LAG; Graugés, E; Graverini, E; Grazette, L; Graziani, G; Grecu, AT; Greeven, LM; Grieser, NA; Grillo, L; Gromov, S; Gu, C; Guarise, M; Guittiere, M; Guliaeva, V; Günther, PA; Guseinov, A-K; Gushchin, E; Guz, Y; Gys, T; Hadavizadeh, T; Hadjivasiliou, C; Haefeli, G; Haen, C; Haimberger, J; Hajheidari, M; Halewood-leagas, T; Halvorsen, MM; Hamilton, PM; Hammerich, J; Han, Q; Han, X; Hansmann-Menzemer, S; Hao, L; Harnew, N; Harrison, T; Hartmann, M; Hasse, C; He, J; Heijhoff, K; Hemmer, F; Henderson, C; Henderson, RDL; Hennequin, AM; Hennessy, K; Henry, L; Herd, J; Heuel, J; Hicheur, A; Hill, D; Hollitt, SE; Horswill, J; Hou, R; Hou, Y; Howarth, N; Hu, J; Hu, W; Hu, X; Huang, W; Hulsbergen, W; Hunter, RJ; Hushchyn, M; Hutchcroft, D; Idzik, M; Ilin, D; Ilten, P; Inglessi, A; Iniukhin, A; Ishteev, A; Ivshin, K; Jacobsson, R; Jage, H; Elles, SJJ; Jakobsen, S; Jans, E; Jashal, BK; Jawahery, A; Jevtic, V; Jiang, E; Jiang, X; Jiang, Y; Jiang, YJ; John, M; Johnson, D; Jones, CR; Jones, TP; Joshi, S; Jost, B; Jurik, N; Juszczak, I; Kaminaris, D; Kandybei, S; Kang, Y; Karacson, M; Karpenkov, D; Karpov, M; Kauniskangas, AM; Kautz, JW; Keizer, F; Keller, DM; Kenzie, M; Ketel, T; Khanji, B; Kharisova, A; Kholodenko, S; Khreich, G; Kirn, T; Kirsebom, VS; Kitouni, O; Klaver, S; Kleijne, N; Klimaszewski, K; Kmiec, MR; Koliiev, S; Kolk, L; Konoplyannikov, A; Kopciewicz, P; Koppenburg, P; Korolev, M; Kostiuk, I; Kot, O; Kotriakhova, S; Kozachuk, A; Kravchenko, P; Kravchuk, L; Kreps, M; Kretzschmar, S; Krokovny, P; Krupa, W; Krzemien, W; Kubat, J; Kubis, S; Kucewicz, W; Kucharczyk, M; Kudryavtsev, V; Kulikova, E; Kupsc, A; Kutsenko, BK; Lacarrere, D; Lafferty, G; Lai, A; Lampis, A; Lancierini, D; Gomez, CL; Lane, JJ; Lane, R; Langenbruch, C; Langer, J; Lantwin, O; Latham, T; Lazzari, F; Lazzeroni, C; Le Gac, R; Lee, SH; Lefèvre, R; Leflat, A; Legotin, S; Lehuraux, M; Leroy, O; Lesiak, T; Leverington, B; Li, A; Li, H; Li, K; Li, L; Li, P; Li, PR; Li, S; Li, T; Li, Y; Li, Z; Lian, Z; Liang, X; Lin, C; Lin, T; Lindner, R; Lisovskyi, V; Litvinov, R; Liu, G; Liu, H; Liu, K; Liu, Q; Liu, S; Liu, Y; Liu, YL; Salvia, AL; Loi, A; Castro, JC; Long, T; Lopes, JH; Huertas, A; Soliño, SL; Lovell, GH; Lucarelli, C; Lucchesi, D; Luchuk, S; Martinez, ML; Lukashenko, V; 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Contributors:	Aaij, R; Abdelmotteleb, Asw; Beteta, Ca; Abudinén, F; Ackernley, T; Adeva, B; Adinolfi, M; Adlarson, P; Afsharnia, H; Agapopoulou, C; Aidala, Ca; Ajaltouni, Z; Akar, S; Akiba, K; Albicocco, P; Albrecht, J; Alessio, F; Alexander, M; Albero, Aa; Aliouche, Z; Cartelle, Pa; Amalric, R; Amato, S; Amey, Jl; Amhis, Y; An, L; Anderlini, L; Andersson, M; Andreianov, A; Andreola, P; Andreotti, M; Andreou, D; Anelli, A; Ao, D; Archilli, F; Cuendis, Sa; Artamonov, A; Artuso, M; Aslanides, E; Atzeni, M; Audurier, B; Bacher, D; Perea, Ib; Bachmann, S; Bachmayer, M; Back, Jj; Bailly-reyre, A; Rodriguez, Pb; Balagura, V; Baldini, W; Leite, Jbd; Barbetti, M; Barbosa, Ir; Barlow, Rj; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, Jm; Bassi, G; Batsukh, B; Battig, A; Bay, A; Beck, A; Becker, M; Bedeschi, F; Bediaga, Ib; Beiter, A; Belin, S; Bellee, V; Belous, K; Belov, I; Belyaev, I; Benane, G; Bencivenni, G; Ben-Haim, E; Berezhnoy, A; Bernet, R; Andres, Sb; Bernstein, Hc; Bertella, C; Bertolin, A; Betancourt, C; Betti, F; Bex, J; Bezshyiko, I; Bhom, J; Bieker, M; Biesuz, Nv; Billoir, P; Biolchini, A; Birch, M; Bishop, Fcr; Bitadze, A; Bizzeti, A; Blago, Mp; Blake, T; Blanc, F; Blank, Je; Blusk, S
Publication Year:	2024
Collection:	Università degli Studi di Bari Aldo Moro: CINECA IRIS
Subject Terms:	Hadron-Hadron Scattering; Multi-Parton Interaction; QCD; Quarkonium
Description:	The production cross-section of J/psi pairs in proton-proton collisions at a centre-of-mass energy of root s = 13TeV is measured using a data sample corresponding to an integrated luminosity of 4.2 fb(-1) collected by the LHCb experiment. The measurement is performed with both J/psi mesons in the transverse momentum range 0 < p(T) < 14 GeV/c and rapidity range 2.0 < y < 4.5. The cross-section of this process is measured to be 16.36 +/- 0.28 (stat) +/- 0.88 (syst) nb. The contributions from single-parton scattering and double-parton scattering are separated based on the dependence of the cross-section on the absolute rapidity difference Delta y between the two J/psi mesons. The effective cross-section of double-parton scattering is measured to be sigma(eff)=13.1 +/- 1.8 (stat) +/- 2.3 (syst) mb. The distribution of the azimuthal angle phi(CS) of one of the J/psi mesons in the Collins-Soper frame and the p(T)-spectrum of the J/psi pairs are also measured for the study of the gluon transverse-momentum dependent distributions inside protons. The extracted values of < cos4 phi(CS)> and < cos2 phi(CS)> are consistent with zero, but the presence of azimuthal asymmetry at a few percent level is allowed.
Document Type:	article in journal/newspaper
Language:	English
Relation:	info:eu-repo/semantics/altIdentifier/wos/WOS:001194594600001; volume:2024; issue:3; journal:JOURNAL OF HIGH ENERGY PHYSICS; https://hdl.handle.net/11586/470885
DOI:	10.1007/JHEP03(2024)088
Availability:	https://hdl.handle.net/11586/470885; https://doi.org/10.1007/JHEP03(2024)088
Rights:	info:eu-repo/semantics/openAccess ; license:Creative commons ; license uri:http://creativecommons.org/licenses/by/4.0/
Accession Number:	edsbas.1133247B
Database:	BASE