Erzeugung schwerer Hadronen mit vorhandenen und zukünftigen Beschleunigern in einem massiven Schema mit veränderlicher Flavour-Zahl
Erzeugung schwerer Hadronen mit vorhandenen und zukünftigen Beschleunigern in einem massiven Schema mit veränderlicher Flavour-Zahl
批准号:
32091429
负责人:
Professor Dr. Bernd A. Kniehl
金额:
$0.0万
依托单位国家:
德国
项目类别:
Research Grants
财政年份:
2006
资助国家:
德国
项目状态:
已结题
起止时间:
2005-12-31 至 2010-12-31
中文摘要
几年来,在HERA, LEP2和Tevatron测量的b介子产生率已经臭名昭著地超过了通常的次一级(NLO) QCD对大质量b夸克(b强子异常)的预测,最高可达三个标准差。这甚至引发了理论尝试,将这种偏差解释为标准模型之外的新物理信号。然而,这种偏差是否可以通过改进和完善QCD预测本身来解释仍有待澄清。为此,我们计划为高能碰撞中重味强子(H = D, B)的包容性产生制定一个严格的理论形式。然后,我们将在该方案中评估NLO相关生产过程的横截面,并对可用的D和B数据集进行全局分析,试图改善整体协议。利用由此提取的FFs,我们将为LHC和未来的e+ e线性对撞机提供可靠的预测。
英文摘要
For several years, the B-meson production rates measured at HERA, LEP2 and Tevatron have been notoriously exceeding, by up to three standard deviations, the usual next-toleading- order (NLO) QCD predictions for massive b quarks (B-hadron anomaly). This has even triggered theoretical attempts to interpret this deviation as a signal of new physics beyond the standard model. However, it remains to be clarified if this deviation can be explained by improving and refining the QCD prediction itself. To this end, we plan to elaborate a rigorous theoretical formalism for the inclusive production of heavy-flavoured hadrons (H = D, B) in high-energy collisions. ¿ We shall then evaluate the cross sections for the relevant production processes at NLO in this scheme and perform global analyses of the available D and B data sets trying to improve the overall agreement. Using the FFs thus extracted, we shall provide reliable predictions for LHC and a future e+ e- linear collider.
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批准号:409060694
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项目类别:Research Grants
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资助金额:$0.0万
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负责人:Professor Dr. Bernd A. Kniehl
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依托单位:
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资助金额:$0.0万
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财政年份:2005
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负责人:Professor Dr. Bernd A. Kniehl
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资助金额:$0.0万
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财政年份:2004
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负责人:Professor Dr. Bernd A. Kniehl
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依托单位:
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项目类别:Research Grants
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资助金额:$0.0万
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财政年份:2000
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负责人:Professor Dr. Bernd A. Kniehl
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财政年份:--
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负责人:Professor Dr. Bernd A. Kniehl
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依托单位:
海外基金