Studies of beauty suppression via nonprompt &lt;em&gt;D&lt;/em&gt;&lt;sup&gt;0&lt;/sup&gt; mesons in Pb-Pb collisions at √&lt;em&gt;s&lt;/em&gt;&lt;sub&gt;NN&lt;/sub&gt; = 5.02 TeV

Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Caminada, L.; Deiters, K.; Erdmann, W.; Horisberger, R.; Ingram, Q.; Kaestli, H.C.; Kotlinski, D.; Langenegger, U.; Rohe, T.; Wiederkehr, S.A.; Woods, N.

doi:10.1103/PhysRevLett.123.022001

Studies of beauty suppression via nonprompt D⁰ mesons in Pb-Pb collisions at √s_NN = 5.02 TeV

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Dragicevic M, Erö J, Escalante Del Valle A, Caminada L, Deiters K, Erdmann W, Horisberger R, Ingram Q, Kaestli HC, Kotlinski D, Langenegger U, Rohe T, Wiederkehr SA, Woods N, et al.

Citation

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., … Woods, N. (2019). Studies of beauty suppression via nonprompt D⁰ mesons in Pb-Pb collisions at √s_NN = 5.02 TeV. Physical Review Letters, 123(2), 022001 (18 pp.). https://doi.org/10.1103/PhysRevLett.123.022001

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:27884

The transverse momentum spectra of D⁰ mesons from b hadron decays are measured at midrapidity (|y| < 1) in pp and Pb-Pb collisions at a nucleon-nucleon center of mass energy of 5.02 TeV with the CMS detector at the LHC. The D⁰ mesons from b hadron decays are distinguished from prompt D⁰ mesons by their decay topologies. In Pb-Pb collisions, the B → D⁰ yield is found to be suppressed in the measured p_T range from 2 to 100 GeV/c as compared to pp collisions. The suppression is weaker than that of prompt D⁰ mesons and charged hadrons for p_T around 10 GeV/c. While theoretical calculations incorporating partonic energy loss in the quark-gluon plasma can successfully describe the measured B → D⁰ suppression at higher p_T, the data show an indication of larger suppression than the model predictions in the range of 2 < p_T < 5 GeV/c.