DOE OSTI · 3011656
Charm fragmentation fractions and $\mathbf {c\overline{c}}$ cross section in p–Pb collisions at $\mathbf {\sqrt{s _{NN}}=5.02 TeV}$
Abstract
The total charm-quark production cross section per unit of rapidity dσ($\mathbf {c\overline{c}}$)/dy, and the fragmentation fractions of charm quarks to different charm-hadron species f(c → h c ), are measured for the first time in p–Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV at midrapidity (–0.96 < y < 0.04 in the centre-of-mass frame) using data collected by ALICE at the CERN LHC. The results are obtained based on all the available measurements of prompt production of ground-state charm-hadron species: D 0 , D + , D$^{+}_{s}$, and J/ψ mesons, and Λ$^{+}_{c}$ and $Ξ$$^{0}_{c}$ baryons. The resulting cross section is dσ($\mathbf {c\overline{c}}$)/dy = 219.6 ± 6.3 (stat.) $^{+10.5}_{–11.8}$ (syst.) $^{+8.3}_{–2.9}$ (extr.) ± 5.4 (BR) ± 4.6 (lumi.) ± 19.5 (rapidity shape) + 15.0 (Ω$^{0}_{c}$) mb, which is consistent with a binary scaling of pQCD calculations from pp collisions. The measured fragmentation fractions are compatible with those measured in pp collisions at $\sqrt{s_{NN}}$ = 5.02 and 13 TeV, showing an increase in the relative production rates of charm baryons with respect to charm mesons in pp and p–Pb collisions compared with e + e – and e – p collisions. The p T -integrated nuclear modification factor of charm quarks, R pPb ($\mathbf {c\overline{c}}$) = 0.91 ± 0.04 (stat.) $^{+0.08}_{–0.09}$ (syst.) $^{+0.05}_{–0.03}$ (extr.) ± 0.03 (lumi.), is found to be consistent with unity and with theoretical predictions including nuclear modifications of the parton distribution functions.
Explore related subjects
Keep this discovery
Explore connections, maps & timelines
Acharya, S. (ORCID:0000000292135329), Adamová, D. (ORCID:0000000205047428), Agarwal, A., Aglieri Rinella, G. (ORCID:0000000296113696), Aglietta, L. (ORCID:0009000307636802), Agnello, M. (ORCID:0000000207605075), Agrawal, N. (ORCID:0000000303489836), Ahammed, Z. (ORCID:0000000152417412), Ahmad, S. (ORCID:0000000304975705), Ahn, S. U. (ORCID:000000018847489X), Ahuja, I. (ORCID:0000000244171392), Akindinov, A. (ORCID:0000000273883022), Akishina, V., Al-Turany, M. (ORCID:0000000280714497), Aleksandrov, D. (ORCID:0000000297197035), Alessandro, B. (ORCID:0000000196804940), Alfanda, H. M. (ORCID:0000000256592119), Alfaro Molina, R. (ORCID:0000000247137069), Ali, B. (ORCID:0000000208777979), Alici, A. (ORCID:0000000336184617), Alizadehvandchali, N. (ORCID:0009000073651064), Alkin, A. (ORCID:0000000222055761), Alme, J. (ORCID:0000000301770536), Alocco, G. (ORCID:0000000189109173), Alt, T. (ORCID:0009000548625370), Altamura, A. R. (ORCID:0000000180485500), Altsybeev, I. (ORCID:0000000280797026), Alvarado, J. R. (ORCID:0000000250381337), Alvarez, C. O. R., Anaam, M. N. (ORCID:0000000261804243), Andrei, C. (ORCID:0000000185350680), Andreou, N. (ORCID:0009000974576866), Andronic, A. (ORCID:0000000223726117), Andronov, E. (ORCID:0000000304379292), Anguelov, V. (ORCID:0009000602362680), Antinori, F. (ORCID:0000000273668891), Antonioli, P. (ORCID:0000000175163726), Apadula, N. (ORCID:0000000254786120), Aphecetche, L. (ORCID:0000000176623878), Appelshäuser, H. (ORCID:0000000306147671), Arata, C. (ORCID:0009000219907289), Arcelli, S. (ORCID:0000000163679215), Aresti, M. (ORCID:0000000331426787), Arnaldi, R. (ORCID:0000000166989577), Arneiro, J. G. M. C. A. (ORCID:0000000251942079), Arsene, I. C. (ORCID:0000000323169565), Arslandok, M. (ORCID:0000000238888303), Augustinus, A. (ORCID:0009000854606805), Averbeck, R. (ORCID:0000000342774963), Averyanov, D. (ORCID:0000000200274648), Azmi, M. D. (ORCID:0000000225016856), Baba, H., Badalà, A. (ORCID:0000000205694828), Bae, J. (ORCID:0009000848068019), Baek, Y. W. (ORCID:0000000243434883), Bai, X. (ORCID:000900099085079X), Bailhache, R. (ORCID:0000000179874592), Bailung, Y. (ORCID:0000000311720225), Bala, R. (ORCID:0000000241162861), Balbino, A. (ORCID:0000000203591403), Baldisseri, A. (ORCID:000000026186289X), Balis, B. (ORCID:0000000230824209), Banerjee, D. (ORCID:0000000157437578), Banoo, Z. (ORCID:0000000271783001), Barbasova, V., Barile, F. (ORCID:0000000320881290), Barioglio, L. (ORCID:0000000273289154), Barlou, M., Barman, B., Barnaföldi, G. G. (ORCID:0000000192236480), Barnby, L. S. (ORCID:0000000173579904), Barreau, E. (ORCID:0009000315330782), Barret, V. (ORCID:0000000306119283), Barreto, L. (ORCID:0000000264540052), Bartels, C. (ORCID:0009000233714483), Barth, K. (ORCID:0000000176331189), Bartsch, E. (ORCID:0009000679284203), Bastid, N. (ORCID:0000000269058345), Basu, S. (ORCID:0000000306878124), Batigne, G. (ORCID:0000000186386300), Battistini, D. (ORCID:0009000001993372), Batyunya, B. (ORCID:0009000929746985), Bauri, D., Alba, J. L. Bazo (ORCID:0000000191489101), Bearden, I. G. (ORCID:0000000327843094), Beattie, C. (ORCID:0000000174314051), Becht, P. (ORCID:0000000279083288), Behera, D. (ORCID:0000000225997957), Belikov, I. (ORCID:0009000559228936), Bell Hechavarria, A. D. C. (ORCID:0000000204426549), Bellini, F. (ORCID:0000000334984661), Bellwied, R. (ORCID:0000000231560188), Belokurova, S. (ORCID:0000000248623384), Beltran, L. G. E. (ORCID:0000000294136069), Beltran, Y. A. V. (ORCID:0009000282124789), Bencedi, G. (ORCID:0000000290405292), Bensaoula, A., Beole, S. (ORCID:0000000346738038), Berdnikov, Y. (ORCID:0000000303095917), Berdnikova, A. (ORCID:0000000337057898). 2024-12-13. Charm fragmentation fractions and $\mathbf {c\overline{c}}$ cross section in p–Pb collisions at $\mathbf {\sqrt{s _{NN}}=5.02 TeV}$. https://doi.org/10.1140/epjc%2Fs10052-024-13394-1
Cite the original work for its findings. Save a collection to share your selection of sources.