论文标题
通过非预付款$ {\ rm d}^{0} $ Mesons在$ \ sqrt {s _ {\ rm nn}} $ = 5.02 tev中测量美容产生的美容生产。
Measurement of beauty production via non-prompt ${\rm D}^{0}$ mesons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV
论文作者
论文摘要
在pb-pb碰撞中，以nucleon-nucleon的能量的$ \ \ sqrt {sqrt {sqrt { nn}} = 5.02〜 \ mathrm {tev} $与LHC的Alice实验。它们的核修饰因子（$ r _ {\ rm aa} $），首次衡量至$ p _ {\ rm t} = 1〜 \ mathrm {gev}/c $ in $ 0-10 $％$％$％和$ 30-50 $％$％$％的中心性类别，指示大约三个因素p _ 5〜 \ Mathrm {gev}/c $在$ 0-10 $％％中央PB-PB碰撞中。数据是通过模型描述的，这些模型包括在夸克 - 格鲁隆等离子体中的美容夸克能量损失中既有碰撞和辐射过程，又包括夸克重组，除了碎片作为强国化机制。非宣传与提示$ {\ rm d}^{0} $ - Meson $ r _ {\ rm aa} $的比率大于$ p _ {\ rm t}> 4〜 \ mathrm {gev}/c $在$ 0-10 $％$％$％$％$％的范围内，与0-10 $％$ 0-10 $ pb相比，与undicts ty prouns相比，与模型相比，$ p _ {\ rm t}> 4〜 \ rm t}> 4〜 \ rm tm t}> unity的比例大于unity。由于夸克 - 格鲁恩等离子体的质量较大，夸克的质量较大。
The production of non-prompt ${\rm D}^{0}$ mesons from beauty-hadron decays was measured at midrapidity ($\left| y \right| < 0.5$) in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of $\sqrt{s_{\rm NN}}=5.02~\mathrm{TeV}$ with the ALICE experiment at the LHC. Their nuclear modification factor ($R_{\rm AA}$), measured for the first time down to $p_{\rm T}=1~\mathrm{GeV}/c$ in the $0-10$% and $30-50$% centrality classes, indicates a significant suppression, up to a factor of about three, for $p_{\rm T} > 5~\mathrm{GeV}/c$ in the $0-10$% central Pb-Pb collisions. The data are described by models that include both collisional and radiative processes in the calculation of beauty-quark energy loss in the quark-gluon plasma, and quark recombination in addition to fragmentation as a hadronisation mechanism. The ratio of the non-prompt to prompt ${\rm D}^{0}$-meson $R_{\rm AA}$ is larger than unity for $p_{\rm T} > 4~\mathrm{GeV}/c$ in the $0-10$% central Pb-Pb collisions, as predicted by models in which beauty quarks lose less energy than charm quarks in the quark-gluon plasma because of their larger mass.
