Threshold Resummation Effects in the Associated Production of Chargino and Neutralino at Hadron Colliders
Threshold Resummation Effects in the Associated Production of Chargino and Neutralino at Hadron Colliders
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强子对撞机中中子和中子相关产生的阈值恢复效应
DOI：
10.1103/physrevd.77.034010
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发表时间：
2007-07
影响因子：
5
通讯作者：
中科院分区：
文献类型：
--
作者：
We investigate the QCD effects in the associated production of the chargino and the neutralino, {chi}-tilde{sub 1}{sup {+-}} and {chi}-tilde{sub 2}{sup 0}, in the minimal supersymmetric standard model at both the Fermilab Tevatron and the CERN Large Hadron Collider. We include the next-to-leading order (NLO) QCD corrections (including supersymmetric QCD) and the threshold resummation effects. Our results show that, compared to the NLO predictions, the threshold resummation effects can increase the total cross sections by 3.6% and 3.9% for the associated production of {chi}-tilde{sub 1}{sup +}{chi}-tilde{sub 2}{sup 0} and {chi}-tilde{sub 1}{sup -}{chi}-tilde{sub 2}{sup 0} at the LHC, respectively, and by 4.7% for those of {chi}-tilde{sub 1}{sup {+-}}{chi}-tilde{sub 2}{sup 0} at the Tevatron. In the invariant mass distributions the resummation effects are significant for large invariant mass. The threshold resummation reduces the dependence of the total cross sections at the LHC (Tevatron) on the renormalization/factorization scales to 5% (4%) from up to 7% (11%) at NLO.
We investigate the QCD effects in the associated production of the chargino and the neutralino, {chi}-tilde{sub 1}{sup {+-}} and {chi}-tilde{sub 2}{sup 0}, in the minimal supersymmetric standard model at both the Fermilab Tevatron and the CERN Large Hadron Collider. We include the next-to-leading order (NLO) QCD corrections (including supersymmetric QCD) and the threshold resummation effects. Our results show that, compared to the NLO predictions, the threshold resummation effects can increase the total cross sections by 3.6% and 3.9% for the associated production of {chi}-tilde{sub 1}{sup +}{chi}-tilde{sub 2}{sup 0} and {chi}-tilde{sub 1}{sup -}{chi}-tilde{sub 2}{sup 0} at the LHC, respectively, and by 4.7% for those of {chi}-tilde{sub 1}{sup {+-}}{chi}-tilde{sub 2}{sup 0} at the Tevatron. In the invariant mass distributions the resummation effects are significant for large invariant mass. The threshold resummation reduces the dependence of the total cross sections at the LHC (Tevatron) on the renormalization/factorization scales to 5% (4%) from up to 7% (11%) at NLO.
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DOI：
10.1016/0550-3213(81)90165-6
发表时间：
1981-02
期刊：
Nuclear Physics
影响因子：
--
作者：
R. Ellis;D. A. Ross;A. E. Terrano
通讯作者：
R. Ellis;D. A. Ross;A. E. Terrano
DOI：
10.1007/s100529900216
发表时间：
1999
期刊：
The European Physical Journal C - Particles and Fields
影响因子：
--
作者：
H. W.;Kraus E.;S. D.
通讯作者：
H. W.;Kraus E.;S. D.
DOI：
10.1016/0550-3213(72)90279-9
发表时间：
1972-07
期刊：
Nuclear Physics
影响因子：
--
作者：
G. Hooft;M. Veltman
通讯作者：
G. Hooft;M. Veltman
影响因子：
8
作者：
A. Denner
通讯作者：
A. Denner
DOI：
10.1016/0550-3213(85)90565-6
发表时间：
1985
期刊：
Nuclear Physics
影响因子：
--
作者：
J. Collins;D. Soper;G. Sterman
通讯作者：
J. Collins;D. Soper;G. Sterman