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Acharya, S, Adamova, D, Adler, A, Adolfsson, J, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU et al (show 1005 more authors) , Ahuja, I, Akbar, Z, Akindinov, A, Al-Turany, M, Alam, SN, Aleksandrov, D, Alessandro, B, Alfanda, HM, Alfaro, R, Ali, B, Ali, Y, Alici, A, Alizadehvandchali, N, Alkin, A, Alme, J, Alocco, G, Alt, T, Altsybeev, I, Anaam, MN, Andrei, C, Andreou, D, Andronic, A, Anguelov, V, Antinori, F, Antonioli, P, Anuj, C, Apadula, N, Aphecetche, L, Appelshaeuser, H, Arcelli, S, Arnaldi, R, Arsene, IC, Arslandok, M, Augustinus, A, Averbeck, R, Aziz, S, Azmi, MD, Badala, A, Baek, YW, Bai, X, Bailhache, R, Bailung, Y, Bala, R, Balbino, A, Baldisseri, A, Balis, B, Banerjee, D, Banoo, Z, Barbera, R, Barioglio, L, Barlou, M, Barnafoldi, GG, Barnby, LS, Barret, V, Bartels, C, Barth, K, Bartsch, E, Baruffaldi, F, Bastid, N, Basu, S, Batigne, G, Batyunya, B, Bauri, D, Bazo, JL, Bearden, IG, Beattie, C, Becht, P, Belikov, I, Bell, ADC, Bellini, F, Bellwied, R, Belokurova, S, Belyaev, V, Bencedi, G, Beole, S, Bercuci, A, Berdnikov, Y, Berdnikova, A, Bergmann, L, Besoiu, MG, Betev, L, Bhaduri, PP, Bhasin, A, Bhat, IR, Bhat, MA, Bhattacharjee, B, Bhattacharya, P, Bianchi, L, Bianchi, N, Bielcik, J, Bielcikova, J, Biernat, J, Bilandzic, A, Biro, G, Biswas, S, Blair, JT, Blau, D, Blidaru, MB, Blume, C, Boca, G, Bock, F, Bogdanov, A, Boi, S, Bok, J, Boldizsar, L, Bolozdynya, A, Bombara, M, Bond, PM, Bonomi, G, Borel, H, Borissov, A, Bossi, H, Botta, E, Bratrud, L, Braun-Munzinger, P, Bregant, M, Broz, M, Bruno, GE, Buckland, MD, Budnikov, D, Buesching, H, Bufalino, S, Bugnon, O, Buhler, P, Buthelezi, Z, Butt, JB, Bylinkin, A, Bysiak, SA, Cai, M, Caines, H, Caliva, A, Calvo, E, Camacho, JMM, Camacho, RS, Camerini, P, Canedo, FDM, Carnesecchi, F, Caron, R, Castellanos, J Castillo, Casula, EAR, Catalano, F, Ceballos, C, Chakaberia, I, Chakraborty, P, Chandra, S, Chapeland, S, Chartier, M 
ORCID: 0000-0003-0578-5567, Chattopadhyay, S, Chattopadhyay, S, Chavez, TG, Cheng, T, Cheshkov, C, Cheynis, B, Barroso, V Chibante, Chinellato, DD, Cho, S, Chochula, P, Christakoglou, P, Christensen, CH, Christiansen, P, Chujo, T, Cicalo, C, Cifarelli, L, Cindolo, F, Ciupek, MR, Clai, G, Cleymans, J, Colamaria, F, Colburn, JS, Colella, D, Collu, A, Colocci, M, Concas, M, Balbastre, G Conesa, del Valle, Z Conesa, Contin, G, Contreras, JG, Coquet, ML, Cormier, TM, Cortese, P, Cosentino, MR, Costa, F, Costanza, S, Crochet, P, Cruz-Torres, R, Cuautle, E, Cui, P, Cunqueiro, L, Dainese, A, Danisch, MC, Danu, A, Das, P, Das, P, Das, S, Dash, S, De Caro, A, de Cataldo, G, De Cilladi, L, de Cuveland, J, De Falco, A, De Gruttola, D, De Marco, N, De Martin, C, De Pasquale, S, Deb, S, Degenhardt, HF, Deja, KR, Del Grande, R, Dello Stritto, L, Deng, W, Dhankher, P, Di Bari, D, Di Mauro, A, Diaz, RA, Dietel, T, Ding, Y, Divia, R, Dixit, DU, Djuvsland, O, Dmitrieva, U, Do, J, Dobrin, A, Doenigus, B, 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(2022)
Observation of a multiplicity dependence in the <i>p</i><sub>T</sub>-differential charm baryon-to-meson ratios in proton-proton collisions at √<i>s</i>=13 TeV.
PHYSICS LETTERS B, 829.
p. 137065.
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Abstract
The production of prompt D0, Ds+, and Λc+ hadrons, and their ratios, Ds+/D0 and Λc+/D0, are measured in proton–proton collisions at s=13 TeV at midrapidity (|y|<0.5) with the ALICE detector at the LHC. The measurements are performed as a function of the charm-hadron transverse momentum (pT) in intervals of charged-particle multiplicity, measured with two multiplicity estimators covering different pseudorapidity regions. While the strange to non-strange Ds+/D0 ratio indicates no significant multiplicity dependence, the baryon-to-meson pT-differential Λc+/D0 ratio shows a multiplicity-dependent enhancement, with a significance of 5.3σ for 1<pT<12 GeV/c, comparing the highest multiplicity interval with respect to the lowest one. The measurements are compared with a theoretical model that explains the multiplicity dependence by a canonical treatment of quantum charges in the statistical hadronisation approach, and with predictions from event generators that implement colour reconnection mechanisms beyond the leading colour approximation to model the hadronisation process. The Λc+/D0 ratios as a function of pT present a similar shape and magnitude as the Λ/KS0 ratios in comparable multiplicity intervals, suggesting a potential common mechanism for light- and charm-hadron formation, with analogous multiplicity dependence. The pT-integrated ratios, extrapolated down to pT=0, do not show a significant dependence on multiplicity within the uncertainties.
Dimensions
Dimensions
