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arXiv 1405.7653hep-ex
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在sqrt(s)= 8 TeV质子-质子碰撞的包含喷流-铂谱中寻找喷流消光

Search for jet extinction in the inclusive jet-pt spectrum from proton-proton collisions at sqrt(s) = 8 TeV

CMS Collaboration

摘要:

首次在大型强子对撞机上对QCD喷流产生的灭绝进行了研究,使用CMS探测器收集的数据,对应于质心能量为8 TeV的质子-质子碰撞的积分亮度为10.7毫微微电子能垒。在这个分析中研究的灭绝模型的动机是在TeV尺度(万亿次引力)的强引力的签名搜索,并假设存在的弦耦合在强耦合的限制。在这个极限下,弦模型预测了所有高横向动量标准模型过程的抑制,包括喷流的产生,超过一定的能量尺度。为了检验这一预测,将测量的横向动量谱与标准模型的理论预测进行比较。在高横动量时,没有发现明显的事件亏损。95%的置信水平下限为3.3 TeV的消光质量规模。

英文摘要:

The first search at the LHC for the extinction of QCD jet production is presented, using data collected with the CMS detector corresponding to an integrated luminosity of 10.7 inverse femtobarns of proton-proton collisions at a center-of-mass energy of 8 TeV. The extinction model studied in this analysis is motivated by the search for signatures of strong gravity at the TeV scale (terascale gravity) and assumes the existence of string couplings in the strong-coupling limit. In this limit, the string model predicts the suppression of all high-transverse-momentum standard model processes, including jet production, beyond a certain energy scale. To test this prediction, the measured transverse-momentum spectrum is compared to the theoretical prediction of the standard model. No significant deficit of events is found at high transverse momentum. A 95% confidence level lower limit of 3.3 TeV is set on the extinction mass scale.

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