Next-to-leading order QCD predictions for associated production of top squarks and charginos at the CERN LHC
Next-to-leading order QCD predictions for associated production of top squarks and charginos at the CERN LHC
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CERN LHC 顶夸克和充质子相关产生的次领先序 QCD 预测
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Jian Jun Liu
中科院分区：
文献类型：
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作者：
L. Jin;Chong;Jian Jun Liu
摘要：我们提出了相关生产过程的完整次主导阶（NLO）包含总截面的计算方法。
伊塔罗 ilde{t}_i 在欧洲核子研究中心大型强子对撞机上的最小超对称标准模型中的ilde{chi}_k^-+X$。我们的计算表明，总的横截面为$ ilde{t}_1 在100 GeV < m_{1}~（？）范围内较轻顶夸克质量的ilde{chi}_1^-$产生 在目前精密实验所允许的有利参数范围内，<160 GeV的ilde{t}_1}能达到1 pb，而在其它情况下，除了m {t}_1}和m {t}_2}外，总截面一般在10 fb到几百fb之间 ilde{t}_1} >$500 GeV和$ ilde{t}_2 ilde{chi}_2^-$ production channel.此外，我们发现，在一般的非线性光学QCD修正提高了领导阶总截面显着，并大大降低了总截面的依赖重整化/因式分解标度，这导致增加的信心，在预测的基础上，这些结果。
Abstract.We present the calculations of the complete next-to-leading order (NLO) inclusive total cross sections for the associated production processes $pp
ightarrow ilde{t}_i ilde{chi}_k^-+X$ in the minimal supersymmetric standard model at the CERN Large Hadron Collider. Our calculations show that the total cross sections for the $ ilde{t}_1 ilde{chi}_1^-$ production for the lighter top squark masses in the region 100 GeV $ < m_{ ilde{t}_1} < $ 160 GeV can reach 1 pb in the favorable parameter space allowed by the current precise experiments, and in other cases the total cross sections generally vary from 10 fb to several hundred fb except for both $m_{ ilde{t}_1} > $ 500 GeV and the $ ilde{t}_2 ilde{chi}_2^-$ production channel. Moreover, we find that the NLO QCD corrections in general enhance the leading order total cross sections significantly, and vastly reduce the dependence of the total cross sections on the renormalization/factorization scale, which leads to increased confidence in predictions based on these results.