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Autor:
Bethke, Siegfried
Quantum Chromodynamics predicts that the strong coupling strength $\alpha_s$ decreases with increasing energy or momentum transfer, and vanishes at asymptotically high energies. The history and the status of experimental tests of asymptotic freedom a
Externí odkaz:
http://arxiv.org/abs/2310.01111
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Autor:
Bethke, Siegfried
As a part of the homage on Guido Altarelli, summarised in the book "From my vast repertoire - the legacy of Guido Altarelli" edited by S. Forte, A. Levy and G. Ridolfi, this contribution collects some of the technological and scientific highlights of
Externí odkaz:
http://arxiv.org/abs/1712.03035
We present a determination of the strong coupling constant $\alpha_s(m_Z)$ using inclusive top-quark pair production cross section measurements performed at the LHC and at the Tevatron. Following a procedure first applied by the CMS collaboration, we
Externí odkaz:
http://arxiv.org/abs/1708.07495
Autor:
Bethke, Siegfried
Determinations of the strong coupling strength, $\alpha_s$, are summarised and a new world average value of $\alpha_s (M_Z)$ is determined, using a new method of pre-averaging results within classes of measurements like hadronic $\tau$ decays, deep i
Externí odkaz:
http://arxiv.org/abs/1210.0325
Autor:
Akopov, Z., Amerio, Silvia, Asner, David, Avetisyan, Eduard, Barring, Olof, Beacham, James, Bellis, Matthew, Bernardi, Gregorio, Bethke, Siegfried, Boehnlein, Amber, Brooks, Travis, Browder, Thomas, Brun, Rene, Cartaro, Concetta, Cattaneo, Marco, Chen, Gang, Corney, David, Cranmer, Kyle, Culbertson, Ray, Dallmeier-Tiessen, Sunje, Denisov, Dmitri, Diaconu, Cristinel, Dodonov, Vitaliy, Doyle, Tony, Dubois-Felsmann, Gregory, Ernst, Michael, Gasthuber, Martin, Geiser, Achim, Gianotti, Fabiola, Giubellino, Paolo, Golutvin, Andrey, Gordon, John, Guelzow, Volker, Hara, Takanori, Hayashii, Hisaki, Heiss, Andreas, Hemmer, Frederic, Hernandez, Fabio, Heyes, Graham, Holzner, Andre, Igo-Kemenes, Peter, Iijima, Toru, Incandela, Joe, Jones, Roger, Kemp, Yves, van Dam, Kerstin Kleese, Knobloch, Juergen, Kreincik, David, Lassila-Perini, Kati, Diberder, Francois Le, Levonian, Sergey, Levy, Aharon, Li, Qizhong, Lobodzinski, Bogdan, Maggi, Marcello, Malka, Janusz, Mele, Salvatore, Mount, Richard, Neal, Homer, Olsson, Jan, Ozerov, Dmitri, Piilonen, Leo, Punzi, Giovanni, Regimbal, Kevin, Riley, Daniel, Roney, Michael, Roser, Robert, Ruf, Thomas, Sakai, Yoshihide, Sasaki, Takashi, Schnell, Gunar, Schroeder, Matthias, Schutz, Yves, Shiers, Jamie, Smith, Tim, Snider, Rick, South, David M., Denis, Rick St., Steder, Michael, Van Wezel, Jos, Varnes, Erich, Votava, Margaret, Wang, Yifang, Weygand, Dennis, White, Vicky, Wichmann, Katarzyna, Wolbers, Stephen, Yamauchi, Masanori, Yavin, Itay, von der Schmitt, Hans
Data from high-energy physics (HEP) experiments are collected with significant financial and human effort and are mostly unique. An inter-experimental study group on HEP data preservation and long-term analysis was convened as a panel of the Internat
Externí odkaz:
http://arxiv.org/abs/1205.4667
Autor:
Schieck, Jochen, Bethke, Siegfried, Kluth, Stefan, Pahl, Christoph, Trocsanyi, Zoltan, Collaboration, the JADE
We present a measurement of the strong coupling alpha_S using the three-jet rate measured with the Durham algorithm in e+e- -annihilation using data of the JADE experiment at centre-of-mass energies between 14 and 44 GeV. Recent theoretical improveme
Externí odkaz:
http://arxiv.org/abs/1205.3714
Autor:
Bethke, Siegfried
Publikováno v:
Nucl.Phys.Proc.Suppl.207-208:156-159,2010
Long-term preservation of data and software of large experiments and detectors in high energy physics is of utmost importance to secure the heritage of (mostly unique) data and to allow advanced physics (re-)analyses at later times. Summarising the w
Externí odkaz:
http://arxiv.org/abs/1009.3763
Autor:
Bethke, Siegfried
Publikováno v:
Eur.Phys.J.C64:689-703,2009
Measurements of $\alpha_s$, the coupling strength of the Strong Interaction between quarks and gluons, are summarised and an updated value of the world average of $\alpha_s (M_Z)$ is derived. Building up on previous reviews, special emphasis is laid
Externí odkaz:
http://arxiv.org/abs/0908.1135
Study of moments of event shapes and a determination of \as using \epem annihilation data from \Jade
Publikováno v:
Eur.Phys.J.C60:181-196,2009; Erratum-ibid.C62:451-452,2009
Data from \epem annihilation into hadrons, collected by the \Jade experiment at centre-of-mass energies between 14 GeV and 44 GeV, are used to study moments of event shape distributions. Models with hadronisation parameters tuned to the LEP 1 precisi
Externí odkaz:
http://arxiv.org/abs/0810.2933