Results 21 to 30 of about 4,598 (182)

The non-perturbative unquenched quark model

EPJ Web of Conferences, 2017
In recent years states in the quarkonium spectrum not expected in the naive quark model have appeared and created a lot of interest. In the theoretical side the study of the effect of meson-meson thresholds in the spectrum have been performed in ...
Entern D.R., Ortega P.G., Fernández F.
doaj   +1 more source

(Anti-)Stokes scattering on kinks

Journal of High Energy Physics, 2023
At leading order, there are three inelastic scattering processes beginning with a quantum kink and a fundamental meson. Meson multiplication, in which the final state is a kink and two mesons, was treated recently.
Jarah Evslin, Hui Liu
doaj   +1 more source

Resolving the RpA and v2 puzzle of D0 mesons in p−Pb collisions at the LHC

Physics Letters B, 2023
It has been a challenge to understand the experimental data on both the nuclear modification factor and elliptic flow of D0 mesons in p−Pb collisions at LHC energies.
Chao Zhang, Liang Zheng, Shusu Shi, Zi-Wei Lin   +3 more
doaj   +1 more source

Generalized Beth–Uhlenbeck Entropy Formula From the Φ‐Derivable Approach

Contributions to Plasma Physics, EarlyView.
ABSTRACT We derive a generalized Beth–Uhlenbeck formula for the entropy of a dense fermion system with strong two‐particle correlations, including scattering states and bound states. We work within the Φ‐derivable approach to the thermodynamic potential.
David Blaschke, Gerd Röpke, Gordon Baym
wiley   +1 more source

Vector-meson production and vector meson dominance

European Physical Journal C: Particles and Fields, 2021
We consider the fidelity of the vector meson dominance (VMD) assumption as an instrument for relating the electromagnetic vector-meson production reaction $$e + p \rightarrow e^\prime + V + p$$ e + p → e ′ + V + p to the purely hadronic process $$V + p ...
Y.-Z. Xu, S.-Y. Chen, Z.-Q. Yao, D. Binosi, Z.-F. Cui, C. D. Roberts   +5 more
doaj   +1 more source

Developing a macroecology for human‐altered ecosystems

Ecography, EarlyView.
Although anthropogenically‐induced ecological disruptions are fundamentally important in defining ecosystem properties, they are largely overlooked by macroecological theory. Anthropogenic disruptions and their effects are generally not comparable to one another, nor to disturbances that are part of natural disturbance regimes.
Erica A. Newman, Mark Q. Wilber, Alexandre Génin, Oriana E. Chafe, Henry F. Houskeeper, Steven Lee, Eric L. Berlow, John Harte   +7 more
wiley   +1 more source

In-medium Properties of the η′-Meson from Photonuclear Reactions

EPJ Web of Conferences, 2012
Investigations of in-medium properties of the η′-meson are presented. The photoproduction of η′-mesons off 12C, 40Ca, 93Nb and 208Pb nuclei has been measured with the Crystal Barrel/TAPS detector system at the ELSA accelerator in Bonn.
Nanova Mariana
doaj   +1 more source

Age‐related trends in niche position and specialization in Neotropical vertebrates

Ecography, EarlyView.
Species' niche positions and breadths within a region's environmental space, measured through ecological niche factor analysis (ENFA) as marginality and specialization, can reflect evolutionary constraints related to lineage age. The ‘internal incumbency' hypothesis predicts that older species, due to competitive preemption, occupy more central niche ...
Carlos Calderón del Cid, Fabricio Villalobos, Ricardo Dobrovolski, Bruno Vilela   +3 more
wiley   +1 more source

Meson scattering in a non-minimally Lorentz-violating scalar QED at finite temperature

European Physical Journal C: Particles and Fields
In this paper we study meson scattering in a non-minimally Lorentz-violating scalar QED at finite temperature. The meson scatterings were investigated in tree level and the finite temperature effects were addressed by using the thermofield dynamics ...
M. C. Araújo, R. V. Maluf, J. Furtado
doaj   +1 more source

Plant adaptive strategies respond to environmental change across European grassland habitats

Ecography, EarlyView.
Grassland ecosystems are facing rapid and ongoing change driven by intensified land‐use and accelerated climate change, highlighting the urgent need to understand their potential adaptation and response to environmental change. We analyzed data from 52 980 vegetation plots spanning all major grassland habitats in Europe (including alpine, rocky, sandy,
Xiao‐Peng Tan, Petr Pyšek, Milan Chytrý, Irena Axmanová, Jan Divíšek, Ilona Knollová, Svetlana Aćić, Idoia Biurrun, Hans Henrik Bruun, Jürgen Dengler, Tetiana Dziuba, Emmanuel Garbolino, Attila Lengyel, Jonathan Lenoir, Ricarda Pätsch, Aaron Pérez‐ Haase, Valerijus Rašomavičius, Eszter Ruprecht, Urban Šilc, Kiril Vassilev, Yi‐Jun Wang, Wen‐Yong Guo   +21 more
wiley   +1 more source