Results 71 to 80 of about 32,113 (216)

Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Vector U‐bosons, often referred to as “dark photons,” are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ2MU$$ {\upvarepsilon}^2\left({M}_U\right) $$ using dilepton data from heavy‐ion from SIS to RHIC ...
Adrian William Romero Jorge, Elena Bratkovskaya, Taesoo Song, Laura Sagunski   +3 more
wiley   +1 more source

A Brief, Biased View of Neutron Star Cooling

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT This is a concise and non‐technical review of topics related to neutron star (NS) cooling, for both young NSs and NSs in low‐mass x‐ray binaries. Neutrino emission from the NS core drives cooling rates, via different processes including Urca processes and pair breaking and formation at the neutron superfluid critical temperature.
Craig Heinke
wiley   +1 more source

Triple product asymmetries in Λb and Ξb0 decays

Physics Letters B, 2015
The LHCb experiment is capable of studying four-body decays of the b-flavored baryons Λb and Ξb0 to charmless final states consisting of charged pions, kaons, and baryons.
Michael Gronau, Jonathan L. Rosner
doaj   +1 more source

Interferometry signatures for QCD first-order phase transition in heavy ion collisions at GSI-FAIR energies

, 2008
Using the technique of quantum transport of the interfering pair we examine the Hanbury-Brown-Twiss (HBT) interferometry signatures for the particle-emitting sources of pions and kaons produced in the heavy ion collisions at GSI-FAIR energies.
Friese V, Kolb P F, Kumar L, M. J Efaaf, Meng C R, Mitrovski M K, Rischke D, Stephans G S F, Wong C Y, Wong C Y, Wong C Y, Yu Li-Li, Zhang W N, Zhang Wei-Ning   +13 more
core   +1 more source

Rare kaon decays

, 1999
We review some recent theoretical results on rare kaon decays. Particular attention is devoted to establish the short distance (direct CP violating) contribution to K_L => ^0 e \bar{e}. This is achieved by a careful study of the long distance part. As byproduct, we discuss interesting chiral tests.
openaire   +3 more sources

CP VIOLATION IN KAON DECAYS [PDF]

International Journal of Modern Physics A, 1998
We review the Standard Model predictions of CP violation in kaon decays. We present an elementary introduction to Chiral Perturbation Theory, four-quark effective Hamiltonians and the relation among them. Particular attention is devoted to K→3π, K→ 2πγ and [Formula: see text] decays.
D'Ambrosio, G., Isidori, G.
openaire   +2 more sources

Cylindrically Symmetric Diffusion Model for Relativistic Heavy‐Ion Collisions

Annalen der Physik, Volume 536, Issue 5, May 2024.
To account for particle production in relativistic heavy‐ion collisions at the Large Hadron Collider, a relativistic diffusion model with cylindrical symmetry is derived from nonequilibrium–statistical considerations. It propagates an initial state based on quantum chromodynamics in time toward a thermal equilibrium limit.
Johannes Hoelck, Georg Wolschin
wiley   +1 more source

Explanation of the observed violation of isospin symmetry in relativistic nucleus-nucleus reactions

Physics Letters B
The violation of isospin symmetry in nucleus-nucleus reactions, as shown in the ratio RK=(K++K−)/(K0+K¯0) presented by NA61/SHINE, can be understood by introducing results from color-string fragmentation in e+e− to nuclear reactions.
Tom Reichert, Jan Steinheimer, Marcus Bleicher   +2 more
doaj   +1 more source

Heavy neutral leptons from kaon decays in the SHiP experiment

Physics Letters B, 2020
We calculate the signal rate of hypothetical heavy neutral leptons (HNL or sterile neutrinos) from kaon decays expected in the framework of the SHiP experiment.
Dmitry Gorbunov, Igor Krasnov, Yury Kudenko, Sergey Suvorov   +3 more
doaj   +1 more source

Nonequilibrium Weak Processes in Kaon Condensation II - Kinetics of condensation --- [PDF]

, 1999
The kinetics of negatively charged kaon condensation in the early stages of a newly born neutron star is considered. The thermal kaon process, in which kaons are thermally produced by nucleon-nucleon collisions, is found to be dominant throughout the ...
A. Akmal, A. E. Nelson, B. L. Friman, C. -H. Lee, C. J. Batty, D. B. Kaplan, D. B. Kaplan, D. Page, G. E. Brown, G. E. Brown, G. E. Brown, G. Q. Li, G. Q. Li, G. Song, H. Fujii, H. Fujii, H. Fujii, H. T. C. Stoof, J. A. Pons, J. Boguta, J. F. Donoghue, J. M. Lattimer, J. Schaffner, J. Schaffner-Bielich, J. W. Percival, M. Baldo, M. Lutz, M. Prakash, M. Prakash, M. Prakash, M. Prakash, M. Takahara, N. K. Glendenning, N. K. Glendenning, N. K. Glendenning, N. K. Glendenning, N. K. Glendenning, Naoki Iwamoto, O. G. Benvenuto, O. V. Maxwell, P. Haensel, P. J. Ellis, P. Senger, R. B. Wiringa, R. Knorren, R. L. Jaffe, S. Balberg, S. K. Ghosh, T. Muto, T. Muto, T. Takatsuka, T. Takatsuka, T. Tatsumi, T. Tatsumi, T. Tatsumi, T. Tatsumi, T. Tatsumi, T. W. Baumgarte, T. W. Baumgarte, T. Waas, T. Waas, T. Waas, Takumi Muto, Toshitaka Tatsumi, V. Koch, V. Thorsson, V. Thorsson, V. Thorsson, W. Cassing, W. Keil   +69 more
core   +3 more sources