Results 91 to 100 of about 62,213 (219)

Effective chiral lagrangian in the chiral limit from the instanton vacuum

, 2003
We study the effective chiral Lagrangian in the chiral limit from the instanton vacuum. Starting from the nonlocal effective chiral action, we derive the effective chiral Lagrangian, using the derivative expansion to order $O(p^4)$ in the chiral limit ...
A. Dhar, A. Pich, A.A. Andrianov, A.A. Bolokhov, B. Golli, B. Holdom, C.D. Roberts, C.V. Christov, D. Diakonov, D. Diakonov, D. Diakonov, D. Diakonov, D. Diakonov, D. Ebert, D. Espriu, D. Espriu, E. Ruiz Arriola, E. Witten, G. Amoros, G. Amoros, G. Ecker, G. Ecker, G. ’t Hooft, G. ’t Hooft, H.W. Fearing, Hyun-Ah Choi, Hyun-Chul Kim, J. Alfaro, J. Balog, J. Bijnens, J. Gasser, J. Gasser, J. Gasser, J. Heitger, J. Wess, J.A. Zuk, J.R. Aitchison, J.R. Aitchison, L.H. Chan, Lai-Him Chan, M. Franz, M. Franz, M. Franz, M. Musakhanov, M. Praszalowicz, M.M. Nagels, M.V. Polyakov, M.V. Polyakov, P. Simic, Q. Wang, R. Alkofer, R.D. Bowler, S. Peris, S. Weinberg, T. Banks, V.Y. Petrov, V.Y. Petrov   +56 more
core   +1 more source

Hard thermal loops and chiral Lagrangians [PDF]

Physical Review D, 1998
Chiral symmetry is used as the guiding principle to derive hard thermal loop effects in chiral perturbation theory. This is done by using a chiral invariant background field method for the non-linear sigma model and the Wess-Zumino-Witten lagrangian, with and without external vector and axial vector sources.
openaire   +2 more sources

Visible GeV ALP from TeV Vector‐Like Leptons

Fortschritte der Physik, Volume 73, Issue 3, March 2025.
Abstract A model is presented where a GeV axion‐like‐particle (ALP) is predicted in a large portion of the parameter space due to the presence of explicit Peccei–Quinn (PQ) symmetry‐breaking terms in an exotic leptonic sector. The latter provides a solution to the muon g−2$g-2$ anomaly, within the framework of the Linear Seesaw neutrino mechanism.
Arturo de Giorgi, Marta Fuentes Zamoro, Luca Merlo   +2 more
wiley   +1 more source

Micropolar Elastoplasticity Using a Fast Fourier Transform‐Based Solver

International Journal for Numerical Methods in Engineering, Volume 126, Issue 1, 15 January 2025.
ABSTRACT This work presents a micromechanical spectral formulation for obtaining the full‐field and homogenized response of elastoplastic micropolar composites. A closed‐form radial‐return mapping is derived from thermodynamics‐based micropolar elastoplastic constitutive equations to determine the increment of plastic strain necessary to return the ...
Noah M. Francis, Ricardo A. Lebensohn, Fatemeh Pourahmadian, Rémi Dingreville   +3 more
wiley   +1 more source

Chiral condensate in nuclear matter beyond linear density using chiral Ward identity*

EPJ Web of Conferences, 2012
We discuss density corrections of the chiral condensate up to a NLO order using the chiral Ward identity and an in-medium chiral perturbation theory.
Jido Daisuke, Goda Soichiro
doaj   +1 more source

Bifurcation, Chaotic, Sensitivity Analysis, and Optical Soliton Profiles for the Spin Hirota–Maxwell–Bloch Equation in an Erbium‐Doped Fiber

Advances in Mathematical Physics, Volume 2025, Issue 1, 2025.
In this work, the reduced spin Hirota–Maxwell–Bloch (rsHMB) equation is examined analytically. This model is useful for characterizing the propagation of femtosecond pulses in an erbium‐doped fiber. The optical soliton solutions of the introduced rsHMB problem are constructed using the Jacobi elliptic function (JEF) expansion technique.
Asma Taskeen, Muhammad Ozair Ahmed, Muhammad Zafarullah Baber, Baboucarr Ceesay, Nauman Ahmed, Zine El Abiddine Fellah   +5 more
wiley   +1 more source

Pseudoscalar mesons and their radial excitations from the Effective Chiral Lagrangian

, 2003
Effective Chiral Lagrangian is derived from QCD in the framework of Field Correlator Method. It contains the effects of both confinement and chiral symmetry breaking due to a special structure of the resulting quark mass operator.
A. Giacomo Di, A. Yu. Dubin, A. Yu. Dubin, J. Gasser, J. M. Carmona, S. M. Fedorov, S. V. Ivanov, V. I. Shevchenko, V. I. Shevchenko, Yu. A. Simonov, Yu. A. Simonov, Yu. A. Simonov, Yu. A. Simonov   +12 more
core   +1 more source

Tensor Condensate Accompanied by Chiral Transition in a Strong Magnetic Field

Advances in High Energy Physics, Volume 2025, Issue 1, 2025.
We investigate tensor condensates and chiral condensates in the (2 + 1)‐flavor Nambu–Jona–Lasinio model at finite temperature and density in the presence of a strong magnetic field. The emergence of the tensor condensate is attributed to the four‐fermion interaction.
Yuan-Hao Niu, Xin-Jian Wen, Subhash Singha   +2 more
wiley   +1 more source

Quartet of spin-3/2 baryons in chiral multiplet $(1, 1/2) \oplus (1/2, 1) $ with mirror assignment

, 2010
We study the possible existence of chiral partners in the spin-$\thalf$ sector of the baryon spectrum. We consider a quartet scheme where four spin-3/2 baryons, $P_{33}$, $D_{33}$, $D_{13}$ and $P_{13}$, group into higher-dimensional chiral multiplets ...
Nagata, Keitaro
core   +1 more source

U(3) chiral perturbation theory with infrared regularization [PDF]

, 2001
We include the eta-prime in chiral perturbation theory without employing 1/N_c counting rules. The method is illustrated by calculating the masses and decay constants of the Goldstone boson octet (pions, kaons, eta) and the singlet eta-prime up to one ...
A. Bramon, B. Borasoy, B. Borasoy, C. Caso, G. Ecker, H. Leutwyler, H. Leutwyler, J. Gasser, J. Kodaira, M. Mojzis, P. Herrera-Siklódy, P. J. Ellis, P. J. Ellis, R. Kaiser, S. L. Adler, S. Wetzel, T. Becher, V. Bernard   +17 more
core   +2 more sources