KEK素粒子原子核研究所・理論セミナー(Prof. Rainer Sommer)

分類理論セミナー
開始2018/03/02(金)16:00
終了2018/03/02(金)17:00
会場研究本館1階会議室1
講演タイトルHow strong are the strong interactions
講演者Prof. Rainer Sommer
言語英語/English
連絡先takashi.kaneko-AT-kek.jp
ウェブサイト
食堂・売店利用予定なし/0

概要

The ALPHA Collaboration has computed one of the most elusive fundamental parameters of Nature: the strong coupling. It governs the interactions of quarks and gluons. At high energies, such as the ones reached at the Large Hadron Collider (LHC) at CERN, many processes can be computed in terms of a Taylor series in this coupling. A precise input value for these series is thus essential to make best use of the accelerator. We have "simulated" QCD, the fundamental theory of the strong interactions, over a large range of energy scales in order to extract the coupling at LHC energies. The experimental input which is presently best suited to minimize the total uncertainty is, surprisingly, the weak decay rate of Pions and Kaons. We explain how our work sets a new standard in the determination of the strong coupling.

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