Results 61 to 70 of about 198,978 (237)

A Linear Sigma Model with Three Flavors and Vector and Axial-Vector Mesons

, 2010
We outline the extension of the globally chirally invariant Nf = 2 linear sigma model with vector and axial-vector degrees of freedom to Nf=3. We present preliminary results concerning the scalar meson masses.Comment: Prepared for the Proceedings of the ...
Giacosa, Francesco, Kovacs, Peter, Parganlija, Denis, Rischke, Dirk H., Wolf, Gyorgy   +4 more
core   +1 more source

Scalar Mesons and Axial-vector Mesons Via Dyson-Schwinger Equation and Bethe-Salpeter Equation Approach [PDF]

arXiv, 2021
In this work, I studied the spectrum of scalar mesons and axial-vector mesons via Dyson-Schwinger equation and Bethe-Salpeter equation approach in the rainbow-ladder approximation. An interaction model with a repulsive term added to the one used for the pseudoscalar and vector mesons is proposed.
arxiv  

The relative influences of long‐term fire management and woody cover on termite abundance and activity in an Australian tropical savanna

Journal of Applied Ecology, Volume 62, Issue 4, Page 848-856, April 2025.
The effects of fire on termite abundance and activity are primarily indirect, mediated through changes in vegetation structure. As high fire activity is associated with reduced woody cover, maintaining regimes of frequent, high‐intensity fires over the long term has the potential to affect ecosystem function.
Ellen Rochelmeyer, Theo Evans, Paul Eggleton, Brett P. Murphy, Shaun R. Levick, Alyson M. Stobo‐Wilson, Anna E. Richards   +6 more
wiley   +1 more source

Cytotype and local adaptation drive phenotypic variation in two subspecies of big sagebrush (Artemisia tridentata)

Ecosphere, Volume 16, Issue 3, March 2025.
Abstract Big sagebrush (Artemisia tridentata) is a widespread and locally dominant shrub throughout many ecosystems in western North America. A. tridentata ssps. tridentata and wyomingensis are two subspecies whose populations occupy the warm‐arid regions of the species range and whose trailing edge is threatened by climate change.
Spencer R. Roop, Keith Reinhardt, Ken Aho, Matthew J. Germino, Bryce A. Richardson   +4 more
wiley   +1 more source

A study of the vector meson ψ(4040) [PDF]

EPJ Web of Conferences, 2019
We investigate the well-known cc¯$c\overline c $ vector state ψ(4040) in the frame-work of a quantum field theoretical model. In particular, we study its spectral function and search for the pole(s) in the complex plane. Quite interestingly, the spectral
Piotrowska M., Giacosa F.
doaj   +1 more source

Some implications of meson dominance in weak interactions [PDF]

Phys.Rev.D55:5385-5407,1997, 1997
The hypothesis is scrutinized that the weak interaction of hadronic systems at low energies is dominated by the coupling of the pseudoscalar, vector, and axial-vector mesons to the weak gauge bosons. The strength of the weak coupling of the rho(770) meson is uniquely determined by vector-meson dominance in electromagnetic interactions; flavor and ...
arxiv   +1 more source

Dead tree removal after drought mortality increases understory plant diversity in a mixed conifer forest

Ecosphere, Volume 16, Issue 3, March 2025.
Abstract Altered disturbance regimes during a time of rapid global change present challenges for decision‐making concerning ecosystem recovery. In the Sierra Nevada of California, USA, 129 million trees died due to severe drought from 2012 to 2017, raising concerns over forest ecosystem health and dead fuel loads available for future wildfires.
Rebecca Bewley Wayman, Quinn M. Sorenson
wiley   +1 more source

Vector meson dominance and the rho meson

, 1998
We discuss the properties of vector mesons, in particular the rho^0, in the context of the Hidden Local Symmetry (HLS) model. This provides a unified framework to study several aspects of the low energy QCD sector.
A. Bernicha, A. Dobado, A. G. Williams, A. Rittenberg, A. Sirlin, B. A. Kniehl, B. V. Geshkenbein, C. B. Lang, C. Callan, C. Caso, C. D. Roberts, C. Itzykson, D. N. Gao, E. Witten, F. Klingl, F. Klingl, G. E. Brown, G. E. Brown, G. J. Gounaris, H. B. O’Connell, H. B. O’Connell, H. B. O’Connell, H. B. O’Connell, H. B. O’Connell, H. P. W. Gottlieb, H. P. W. Gottlieb, J. Pisut, J. Schechter, K. Kawarabayashi, K. L. Mitchell, K. Maltman, L. C. L. Hollenberg, L. M. Barkov, M. A. Halasz, M. Bando, M. Bando, M. Bando, M. Benayoun, M. Benayoun, M. Benayoun, M. Beuthe, M. F. Heyn, M. Harada, M. Harada, M. Hashimoto, M. Hashimoto, M. Lévy, M. R. Frank, N. Kroll, P. C. Tandy, P. Maris, P. Maris, P. Q. Hung, P. R. Bevington, P. Söding, P. W. Higgs, R. Barate, R. E. Peierls, R. G. Stuart, R. G. Stuart, R. G. Stuart, R. G. Stuart, Riazuddin, S. Coleman, S. Coleman, S. Gardner, S. Weinberg, T. Fujiwara, T. W. B. Kibble, T. Yoshie, V. L. Eletskii, W. Weise   +71 more
core   +2 more sources

Nuclear shadowing at low Q^2 [PDF]

, 2003
We re-examine the role of vector meson dominance in nuclear shadowing at low Q^2. We find that models which incorporate both vector meson and partonic mechanisms are consistent with both the magnitude and the Q^2 slope of the shadowing data.Comment: 7 ...
A. Capella, A. Donnachie, A. W. Thomas, A.H. Mueller, B. Badelek, B.Z. Kopeliovich, B.Z. Kopeliovich, C. Boros, C. Boros, C.L. Bilchak, E.L. Berger, F.E. Close, G. Ingelman, G. Piller, G. Piller, G. Shaw, G.A. Schuler, G.A. Schuler, G.P. Zeller, J. Kwiecinski, J. Kwiecinski, J. Qiu, J.C. Collins, K. Goulianos, L.L. Frankfurt, M. Arneodo, M. Arneodo, M.R. Adams, M.R. Adams, M.R. Adams, N.N. Nikolaev, P. Amaudruz, R.J. Glauber, S. Kovalenko, S. Kumano, S.J. Brodsky, T.H. Bauer, V.N. Gribov, W. Melnitchouk, W. Melnitchouk, W. Melnitchouk, W. Melnitchouk   +41 more
core   +3 more sources

Spectra and decay rates of bb̄ meson using Gaussian wave function

EPJ Web of Conferences, 2015
Using the Gaussian wave function mass spectra and decay rates of bb̄ meson are investigated in the framework of phenomenological quark anti-quark potential (coulomb plus power) model consisting of relativistic corrections to the kinetic energy term.
Rai Ajay Kumar, Devlani Nayneshkumar, Kher Virendrasinh H.   +2 more
doaj   +2 more sources