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Zavertyaev M, Zhang L, Zhang Y, Zhelezov A, Zheng Y, Zhu X, Zhukov V, Zucchelli S
40European Organization for Nuclear Research (CERN), Geneva, Switzerland.
39Universidad de Santiago de Compostela, Santiago de Compostela, Spain.
Eur Phys J C Part Fields. 2017;77(12):812. doi: 10.1140/epjc/s10052-017-5178-x. Epub 2017 Nov 29.
A search is presented for long-lived particles with a mass between 25 and 50 and a lifetime between 2 and 500 ps, using proton-proton collision data corresponding to an integrated luminosity of 2.0 , collected by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The particles are assumed to be pair-produced in the decay of a 125 Standard-Model-like Higgs boson. The experimental signature is a single long-lived particle, identified by a displaced vertex with two associated jets. No excess above background is observed and limits are set on the production cross-section as a function of the mass and lifetime of the long-lived particle.
利用大型强子对撞机底夸克探测器（LHCb）在质心能量为7和8 TeV时收集的、对应于2.0的积分亮度的质子-质子碰撞数据，对质量在25至50之间且寿命在2至500皮秒之间的长寿命粒子进行了搜索。假设这些粒子是在一个125类似标准模型的希格斯玻色子的衰变中产生的。实验特征是一个单一的长寿命粒子，通过一个带有两个关联喷注的位移顶点来识别。未观察到超出背景的信号，并根据长寿命粒子的质量和寿命对产生截面设定了限制。
