Results 111 to 120 of about 15,240 (207)

Chiral effective Lagrangian and quark masses [PDF]

Nuclear Physics B - Proceedings Supplements, 2003
The status of lattice determinations of quark masses is reviewed (with the exception of m_b). Attempts to extract the low-energy constants in the effective chiral Lagrangian are discussed, with special emphasis on those couplings which are required to test the hypothesis of a massless up-quark.
openaire   +2 more sources

Advances in Miniaturized Computational Spectrometers

Advanced Science, Volume 11, Issue 47, December 18, 2024.
This review presents a comprehensive overview of miniaturized computational spectrometers, focusing on spectral encoding strategies and reconstruction algorithms. The analysis includes recent advances, optimization strategies, performance metrics, and considerations for practical applications.
Qian Xue, Yang Yang, Wenkai Ma, Hanqiu Zhang, Daoli Zhang, Xinzheng Lan, Liang Gao, Jianbing Zhang, Jiang Tang   +8 more
wiley   +1 more source

Chiral Lagrangian with confinement from the QCD Lagrangian [PDF]

Physical Review D, 2002
An effective Lagrangian for the light quark in the field of a static source is derived systematically using the exact field correlator expansion. The lowest Gaussian term is bosonized using nonlocal colorless bosonic fields and a general structure of effective chiral Lagrangian is obtained containing all set of fields.
openaire   +2 more sources

The standard model at low energies

, 1993
The hadronic sector of the standard model at low energies is described by a non--decoupling effective field theory, chiral perturbation theory. An introduction is given to the construction of effective chiral Lagrangians, both in the purely mesonic ...
A. G. Cohen, A. I. Vainshtein, A. Krause, A. V. Manohar, B. Grinstein, C. Callan, D. Morgan, E. Eichten, E. Jenkins, E. Jenkins, E. Witten, G. D'Ambrosio, G. D. Barr, G. Ecker, G. Ecker, G. Ecker, G. Ecker, G. Ecker, G. Ecker, G. Ecker, H. Euler, H. Georgi, H. Georgi, H. Leutwyler, H. Marsiske, J. A. Bagger, J. Bijnens, J. Bijnens, J. Bijnens, J. Bijnens, J. F. Donoghue, J. F. Donoghue, J. F. Donoghue, J. Gasser, J. Gasser, J. Gasser, J. Gasser, J. Kambor, J. L. Goity, J. S. Bell, J. Wess, L. Cappiello, L. Cappiello, M. Bandoc, M. Goldberger, M. Praszalowicz, M. R. Pennington, N. Isgur, P. Baenst de, R. Dashen, R. Funck, R. M. Davidson, S. Coleman, S. L. Adler, S. Scherer, S. Weinberg, S. Weinberg, S. Weinberg, T. Mannel, U.-G. Meißner, U.-G. Meißner, U.-G. Meißner, V. Bernard, V. Bernard, V. Bernard, V. Bernard, W. A. Bardeen, W. Heisenberg   +67 more
core   +2 more sources

Reconciling threshold and subthreshold expansions for pion–nucleon scattering

Physics Letters B, 2017
Heavy-baryon chiral perturbation theory (ChPT) at one loop fails in relating the pion–nucleon amplitude in the physical region and for subthreshold kinematics due to loop effects enhanced by large low-energy constants.
D. Siemens, J. Ruiz de Elvira, E. Epelbaum, M. Hoferichter, H. Krebs, B. Kubis, U.-G. Meißner   +6 more
doaj   +1 more source

A new theory framework for the electroweak radiative corrections in K l3 decays

Journal of High Energy Physics, 2020
We propose a new theory framework to study the electroweak radiative corrections in K l3 decays by combining the classic current algebra approach with the modern effective field theory. Under this framework, the most important O $$ \mathcal{O} $$ (G F α)
Chien-Yeah Seng, Daniel Galviz, Ulf-G. Meißner   +2 more
doaj   +1 more source

Remarks on the pion–nucleon σ-term

Physics Letters B, 2016
The pion–nucleon σ-term can be stringently constrained by the combination of analyticity, unitarity, and crossing symmetry with phenomenological information on the pion–nucleon scattering lengths. Recently, lattice calculations at the physical point have
Martin Hoferichter, Jacobo Ruiz de Elvira, Bastian Kubis, Ulf-G. Meißner   +3 more
doaj   +1 more source

Vector two-point functions in finite volume using partially quenched chiral perturbation theory at two loops

Journal of High Energy Physics, 2017
We calculate vector-vector correlation functions at two loops using partially quenched chiral perturbation theory including finite volume effects and twisted boundary conditions.
Johan Bijnens, Johan Relefors
doaj   +1 more source

Counting chiral primaries in N=1 d=4 superconformal field theories

, 2005
I derive a procedure to count chiral primary states in N=1 superconformal field theories in four dimensions. The chiral primaries are counted by putting the N=1 field theory on S^3 X R.
Affleck, Aharony, Baha Balantekin, Beasley, Berenstein, Berenstein, Blau, Brandhuber, Cachazo, Christian Römelsberger, Dijkgraaf, Douglas, Ferrara, Gopakumar, Intriligator, Kachru, Kim, Klebanov, Kutasov, Leigh, Lin, Lin, Okuyama, Seiberg, Seiberg, Svrcek, Wess, Witten   +27 more
core   +1 more source

Hadronic light-by-light contribution to aμ: extended Nambu-Jona-Lasinio, chiral quark models and chiral Lagrangians

EPJ Web of Conferences, 2016
This talk discusses our old work on the hadronic light-by-light contribution to the muon anomalous magnetic moment and some more recent contributions. I discuss the various contributions starting with pseudoscalar meson exchange, the quark- and pion-loop,
Bijnens Johan
doaj   +1 more source