论文标题
在$ \ sqrt {s} = 7 $ tev的质子质子碰撞中的独家斜杆对生产的测量
Measurement of exclusive pion pair production in proton-proton collisions at $\sqrt{s} = 7$ TeV with the ATLAS detector
论文作者
论文摘要
在此过程中，PPπ^+π^ - $在该过程中的独家生产$ pp \ $ $以$ \ sqrt {s} $ = 7 tev在LHC上的Atlas detector进行了测量，使用80 $ $ $ $ b $ b $^{ - 1} $低亮度数据的$。在Atlas Central探测器中检测到PION对，同时在前向Atlas Alfa探测器系统中测量了传出的质子。这代表了质子标记的首次使用来测量LHC处的独家耐药性最终状态。横截面测量是在由质子动量，锥速速度和横向动量以及斜向偏置不变质量定义的两个运动区域进行的。截面值$ 4.8 \ pm 1.0 \ text {（stat。）} + {}^{ + 0.3} _ { - 0.2} \ text {（syst。）}μ$ $ b和$ 9 \ pm 6 \ pm 6 \ pm 6 \ pm 6 \ text {（stat。在两个地区；它们与理论模型进行了比较，并提供了这种类型测量的可行性的证明。
The exclusive production of pion pairs in the process $pp\to ppπ^+π^-$ has been measured at $\sqrt{s}$ = 7 TeV with the ATLAS detector at the LHC, using 80 $μ$b$^{-1}$ of low-luminosity data. The pion pairs were detected in the ATLAS central detector while outgoing protons were measured in the forward ATLAS ALFA detector system. This represents the first use of proton tagging to measure an exclusive hadronic final state at the LHC. A cross-section measurement is performed in two kinematic regions defined by the proton momenta, the pion rapidities and transverse momenta, and the pion-pion invariant mass. Cross section values of $4.8 \pm 1.0 \text{(stat.)} + {}^{+0.3}_{-0.2} \text{(syst.)}μ$b and $9 \pm 6 \text{(stat.)} + {}^{+2}_{-2}\text{(syst.)}μ$b are obtained in the two regions; they are compared with theoretical models and provide a demonstration of the feasibility of measurements of this type.
