论文标题
搜索$ bb \ bar {b} \ bar {b} $ tetraquark在4个muons中衰减，$ b^{+} b^{ - } $，$ b^0 \ bar {b}^0 $ and $ b_s^0 $ and $ b_s^0 \ bar {b} b} _s _s _s^0 $ Channel at LHC
Search for $bb\bar{b}\bar{b}$ tetraquark decays in 4 muons, $B^{+} B^{-}$, $B^0 \bar{B}^0$ and $B_s^0 \bar{B}_s^0$ channels at LHC
论文作者
论文摘要
我们对$ bb \ bar {b} \ bar {b} $ tetraquark进行定量分析，并衰减为隐藏和开放的底部媒介，并首次计算出$ bb \ bar {b} \ bar {b} \ bar {b} $ tetraquark $ tetraquark总衰减宽度。根据结果，我们提出$ bb \ bar {b} \ bar {b} \ to b^{+} b^{ - }（b^0 \ bar {b}^0）（b_s^0 \ bar {b bar {b} _s _s _s^0）观察$ bb \ bar {b} \ bar {b} $ tetraquark状态，因为计算出的两个lepton横截面上限，$ \ simeq 39 $ fb，以至于可以通过2018 LHCB灵敏度检测到很大， 铺平了观察$ bb \ bar {b} \ bar {b} $ tetraquark的方式，以后lhcb升级。 $4μ$信号的基础状态，$ j^{pc} = 0^{++} $，即使对于升级的LHCB来说也可能太小，但是对于$ J^{pc} = 2^{++} $完全bottom状态而言，它可能不会绝望。
We perform a quantitative analysis of the $bb\bar{b}\bar{b}$ tetraquark decays into hidden- and open-bottom mesons and calculate, for the first time, the $bb\bar{b}\bar{b}$ tetraquark total decay width. On the basis of our results, we propose the $bb\bar{b}\bar{b} \to B^{+} B^{-} (B^0 \bar{B}^0) (B_s^0 \bar{B}_s^0) \to l^{+} l^{-}+\text{X}$ decays as the most suitable channels to observe the $bb\bar{b}\bar{b}$ tetraquark states, since the calculated two-lepton cross section upper limit, $\simeq 39 $ fb, is so large as to be potentially detectable with the 2018 LHCb sensitivity, paving the way to the observation of the $bb\bar{b}\bar{b}$ tetraquark in the future LHCb upgrade. The $4μ$ signal for the ground state, $J^{PC}=0^{++}$, is likely to be too small even for the upgraded LHCb, but it may not be hopeless for the $J^{PC}=2^{++}$ fully-bottom state.
