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Observation of a multiplicity dependence in the p T-differential charm baryon-to-meson ratios in proton–proton collisions at s = 13 TeV
- Collaboration, ALICE;
- Acharya, S;
- Adamová, D;
- Adler, A;
- Adolfsson, J;
- Rinella, G Aglieri;
- Agnello, M;
- Agrawal, N;
- Ahammed, Z;
- Ahmad, S;
- Ahn, SU;
- Ahuja, I;
- Akbar, Z;
- Akindinov, A;
- Al-Turany, M;
- Alam, SN;
- Aleksandrov, D;
- Alessandro, B;
- Alfanda, HM;
- Molina, R Alfaro;
- 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;
- Appelshäuser, H;
- Arcelli, S;
- Arnaldi, R;
- Arsene, IC;
- Arslandok, M;
- Augustinus, A;
- Averbeck, R;
- Aziz, S;
- Azmi, MD;
- Badalà, A;
- Baek, YW;
- Bai, X;
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- Bailung, Y;
- Bala, R;
- Balbino, A;
- Baldisseri, A;
- Balis, B;
- Banerjee, D;
- Banoo, Z;
- Barbera, R;
- Barioglio, L;
- Barlou, M;
- Barnaföldi, GG;
- Barnby, LS;
- Barret, V;
- Bartels, C;
- Barth, K;
- Bartsch, E;
- Baruffaldi, F;
- Bastid, N;
- Basu, S;
- Batigne, G;
- Batyunya, B;
- Bauri, D;
- Alba, JL Bazo;
- Bearden, IG;
- Beattie, C;
- Becht, P;
- Belikov, I;
- Hechavarria, ADC Bell;
- Bellini, F;
- Bellwied, R;
- Belokurova, S;
- Belyaev, V;
- Bencedi, G;
- Beole, S;
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- Berdnikov, Y;
- Berdnikova, A;
- Bergmann, L;
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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
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