论文标题
$η_C$和$υ（1s）$衰减的轻膜光谱和Gluonium搜索
Light meson spectroscopy and gluonium searches in $η_c$ and $Υ(1S)$ decays at BaBar
论文作者
论文摘要
我们使用与Babar检测器在Slac Pep-ii不对称能量$ E^+ E^+ E^+ E^ - $ Collider在Center-Mass Encorgies的Slac Pep-ii不对称 - Energy $ E^+ E^ - $υ（2S）$购中的$∂（2S）$∂（3S）（3S）（3S）（3S）（3S）（3S）（3S）（3S）（3S）（3S）（3S）（3s）（3s）（3s）（3s）（3s）（3s）（3s）（3s）（3s）（3s）（3s）（3S）（3S）（3s）（3s）（3s）（3）。 $υ（1s）$共振从衰减$υ（ns）\至π^+π^ - υ（1s）$，$ n = 2,3 $重建。 We also study the processes $γγ\to η_c \to η^{\prime}K^+K^-$, $η^{\prime}π^+π^-$, and $ηπ^+ π^-$ using a data sample of 519 $fb^{-1}$ recorded with the BaBar detector at center-of-mass energies at and near the $Υ(nS)$ （$ n = 2,3,4 $）共振。执行$η_c$衰减到$η^{\ prime} k^+k^ - $，$η^{\ prime}π^+π^ - $和$ηπ^+π^ - $。在$ηπ^{\ pm} $不变性质量频谱中观察到新的$ a_0（1700）$共振，从$η_c\ toηπ^+π^ - $ decay。我们将$η_c$衰减与$η$和$η^{\ prime} $最终状态与标量介子有关，因为它们与标量粘合球的识别有关。
We study the $Υ(1S)$ radiative decays to $γπ^+ π^-$ and $γK^+ K^-$ using data recorded with the BaBar detector operating at the SLAC PEP-II asymmetric-energy $e^+e^-$ collider at center-of-mass energies at the $Υ(2S)$ and $Υ(3S)$ resonances. The $Υ(1S)$ resonance is reconstructed from the decay $Υ(nS)\to π^+ π^- Υ(1S)$, $n=2,3$. We also study the processes $γγ\to η_c \to η^{\prime}K^+K^-$, $η^{\prime}π^+π^-$, and $ηπ^+ π^-$ using a data sample of 519 $fb^{-1}$ recorded with the BaBar detector at center-of-mass energies at and near the $Υ(nS)$ ($n = 2,3,4$) resonances. A Dalitz plot analysis is performed of $η_c$ decays to $η^{\prime}K^+K^-$, $η^{\prime}π^+π^-$, and $ηπ^+ π^-$. A new $a_0(1700)$ resonance is observed in the $ηπ^{\pm}$ invariant-mass spectrum from the $η_c \to ηπ^+ π^-$ decay. We compare $η_c$ decays to $η$ and $η^{\prime}$ final states in association with scalar mesons as they relate to the identification of the scalar glueball.
