论文标题
轻中性介子的能量依赖性$ p _ {\ rm t} $频谱在pp碰撞中产生的LHC在Alice中测得的LHC
Energy dependence of light neutral meson $p_{\rm T}$ spectrum produced in pp collisions at the LHC measured in ALICE
论文作者
论文摘要
我们介绍了光中性介子的测量，$π^{0} $和$η$，在LHC的爱丽丝实验获得的不同质量中心能量的PP碰撞中。 $π^{0} $和$η$介子是通过电磁热量表和中央跟踪系统重建的光子测量的。 $π^{0} $的不变横截面和$η$介子以$ p _ {\ rm t} $ range的$ \ sqrt {s} = 0.9，2.76，7，7，5.02 $和8 tev进行测量。 $π^{0} $的光谱和$η$介子在不同的碰撞能量中测量的$ x _ {\ rm t} $ - 以高$ p _ {\ rm t} $缩放，违反$ m _ {\ rm t} $ - 在低$ p p _ _ {与RHIC相比，较小的$ x _ {\ rm t} $ - 我们测量的缩放指数可能暗示LHC较高扭曲过程的重要性降低了。
We present the measurement of light neutral mesons, $π^{0}$ and $η$, in pp collisions at different center-of-mass energies obtained with the ALICE experiment at the LHC. The $π^{0}$ and $η$ mesons are measured via photons reconstructed by the electromagnetic calorimeters and the central tracking system. The invariant cross-section of $π^{0}$ and $η$ mesons are measured in a broad $p_{\rm T}$ range at $\sqrt{s} = 0.9, 2.76, 7, 5.02$ and 8 TeV. The spectra of $π^{0}$ and $η$ mesons measured in pp collisions at different collision energies show $x_{\rm T}$-scaling at high $p_{\rm T}$ and violation of $m_{\rm T}$-scaling at low $p_{\rm T}$. The smaller $x_{\rm T}$-scaling exponents of our measurements compared to RHIC may hint at a reduced importance of higher twist processes at LHC.
