Production of ω mesons in pp collisions at √s=7TeV
European Physical Journal C(2020)
摘要
The invariant differential cross section of inclusive $$\omega (782)$$
meson production at midrapidity (
$$|y|<0.5$$
) in pp collisions at $$\sqrt{s}=7\,\hbox {TeV}$$
was measured with the ALICE detector at the LHC over a transverse momentum range of $$2< p_{\mathrm {T}}< 17\,\hbox {GeV}/c$$
. The $$\omega $$
meson was reconstructed via its $$\omega \rightarrow \pi ^+\pi ^-\pi ^0$$
decay channel. The measured $$\omega $$
production cross section is compared to various calculations: PYTHIA 8.2 Monash 2013 describes the data, while PYTHIA 8.2 Tune 4C overestimates the data by about 50%. A recent NLO calculation, which includes a model describing the fragmentation of the whole vector-meson nonet, describes the data within uncertainties below $$6\,\hbox {GeV}/c$$
, while it overestimates the data by up to 50% for higher $$p_{\mathrm {T}}$$
. The $$\omega /\pi ^0$$
ratio is in agreement with previous measurements at lower collision energies and the PYTHIA calculations. In addition, the measurement is compatible with transverse mass scaling within the measured $$p_{\mathrm {T}}$$
range and the ratio is constant with $$C^{\omega /\pi ^{0}}= 0.67 \pm 0.03 \text {~(stat)~} \pm 0.04 \text {~(sys)~}$$
above a transverse momentum of $$2.5\,\hbox {GeV}/c$$
.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要