Results 131 to 140 of about 1,082 (220)

Production of π + π − pairs in diffractive photon-proton and in proton-proton collisions revisited, in particular concerning the Drell-Söding contribution

Journal of High Energy Physics
We discuss the exclusive photoproduction of π + π − pairs in photon-proton and in proton-proton collisions at high energies. The ρ 0, ω, f 2(1270), and non-resonant (Drell-Söding) contributions are considered.
Piotr Lebiedowicz, Otto Nachtmann, Antoni Szczurek   +2 more
doaj   +1 more source

Effective field theories for heavy quarkonium [PDF]

This article reviews recent theoretical developments in heavy-quarkonium physics from the point of view of effective-field theories of QCD. We discuss nonrelativistic QCD and concentrate on potential nonrelativistic QCD.
Vairo, Antonio, Brambilla, Nora, Pineda, Antonio, Soto Riera, Joan   +3 more
core  

Aspects of holographic string theory [PDF]

, 2009
In this thesis we study several aspects of gauge/gravity dualities. We start by analyzing the structure of the UV divergences of the Wilson loop for a general gauge/gravity duality.
Giataganas, Dimitrios, Dimitrios Giataganas   +1 more
core  

Electromagnetic tomography of spin- 3 2 $$ \frac{3}{2} $$ hidden-charm strange pentaquarks

Journal of High Energy Physics
Understanding how quarks are spatially arranged inside exotic pentaquarks remains one of the key open problems in contemporary hadron spectroscopy. The electromagnetic multipole moments of hadrons provide a direct probe of their internal quark-gluon ...
Ulaş Özdem
doaj   +1 more source

Predicting isovector charmonium-like states from X(3872) properties

Journal of High Energy Physics
Using chiral effective field theory, we predict that there must be isovector charmonium-like D D ¯ ∗ $$ D{\overline{D}}^{\ast } $$ hadronic molecules with J PC = 1++ denoted as W c1.
Zhen-Hua Zhang, Teng Ji, Xiang-Kun Dong, Feng-Kun Guo, Christoph Hanhart, Ulf-G. Meißner, Akaki Rusetsky   +6 more
doaj   +1 more source

Short-range production of three bottom mesons

Journal of High Energy Physics
Previous investigations of the three-body dynamics of B mesons have shown that no Efimov effect arises in systems composed of three B and B * mesons.
Yong-Hui Lin, Hans-Werner Hammer, Ulf-G. Meißner   +2 more
doaj   +1 more source

Gauge Mediated Supersymmetry Breaking in Five Dimensions [PDF]

, 2011
PhDIn this thesis we focus on the construction of models in which a supersymmetry breaking hidden sector is located on one fixed point of an extra dimensional interval and the effects are gauge mediated across this interval to the other fixed point ...
McGarrie, Moritz
core  

Effective field theories in nuclear particle and atomic physics [Elektronisk resurs] [PDF]

, 2005
These are the proceedings of the workshop on ``Effective Field Theories in Nuclear, Particle and Atomic Physics'' held at the Physikzentrum Bad Honnef of the Deutsche Physikalische Gesellschaft, Bad Honnef, Germany from December 13 to 17, 2005.
Meissner, Ulf.-G., Bijnens, Johan,, Wirzba, Andreas   +2 more
core  

Poincaré invariance in low-energy effective field theories for QCD

Journal of Physics: Conference Series, 2016
We present the calculations on deriving relations between the Wilson coefficients in non-relativistic quantum chromodynamics and potential non-relativistic quantum chromodynamics by exploiting the Poincare invariance. Implications of the constraints are briefly discussed in the context of the effective string theory.
openaire   +1 more source

A precise α s determination from the R-improved QCD static energy

Journal of High Energy Physics
The strong coupling α s is determined with high precision from fits to lattice QCD simulations on the static energy. Our theoretical setup relies on R-improving the three-loop fixed-order prediction for the static energy by removing its u = 1/2 ...
Jose M. Mena-Valle, Vicent Mateu, Pablo G. Ortega   +2 more
doaj   +1 more source