Zobrazeno 1 - 10
of 220
pro vyhledávání: '"Kekez D"'
Publikováno v:
Phys. Lett. B738 (2014) 113
The Witten-Veneziano relation, or, alternatively, its generalization proposed by Shore, facilitates understanding and describing the complex of eta and eta' mesons. We present an analytic, closed-form solution to Shore's equations which gives results
Externí odkaz:
http://arxiv.org/abs/1405.3299
Publikováno v:
Acta Phys.Polon.Supp. 6 (2013) 3, 935
Recent RHIC results on eta' multiplicity in heavy-ion collisions are of great importance because they clearly signal a partial restoration of U_A(1) symmetry at high temperatures T, and thus provide an unambiguous signature of the formation of a new
Externí odkaz:
http://arxiv.org/abs/1311.1052
Publikováno v:
Physics Letters B 721 (2013), pp. 220-223
In this Letter we report on the results of our search for photons from a U(1) gauge factor in the hidden sector of the full theory. With our experimental setup we observe the single spectrum in a HPGe detector arising as a result of the photoelectric
Externí odkaz:
http://arxiv.org/abs/1210.1043
To accomodate recent RHIC data on eta prime multiplicity, we propose a minimal modification of the Witten-Veneziano relation at high temperature. This renders a significant drop of eta prime mass at high temperature signaling a restoration of the U(1
Externí odkaz:
http://arxiv.org/abs/1207.3068
Publikováno v:
Phys.Rev.D84:016006,2011
We discuss and propose the minimal generalization of the Witten-Veneziano relation to finite temperatures, prompted by STAR and PHENIX experimental results on the multiplicity of eta' mesons. After explaining why these results show that the zero-temp
Externí odkaz:
http://arxiv.org/abs/1105.0356
Publikováno v:
Phys.Rev.D84:045004,2011
Photon-neutrino interactions arise quite naturally in noncommutative field theories. Such couplings are absent in ordinary field theory and imply experimental lower bounds on the energy scale Lambda_NC ~ 1/|theta|^2 of noncommutativity. Using non-per
Externí odkaz:
http://arxiv.org/abs/1103.3383
Publikováno v:
Phys.Lett.B699:21-24,2011
In this experiment we aim to look for keV-mass bosons emitted from the Sun, by looking at a process analogous to the photoelectric/Compton effect inside the HPGe detector. Their coupling to both electrons and nucleons is assumed. For masses above 25
Externí odkaz:
http://arxiv.org/abs/1101.5523
Publikováno v:
Phys.Rev.D83:065013,2011
If new physics were capable to push the neutrino-nucleon inelastic cross section three orders of magnitude beyond the standard-model (SM) prediction, then ultra-high energy (UHE) neutrinos would have already been observed at neutrino observatories. W
Externí odkaz:
http://arxiv.org/abs/1005.3209
Publikováno v:
Phys.Lett.B671:345-348,2009
We have searched for hadronic axions which may be produced in the Sun by a bremsstrahlung-like process, and observed in the HPGe detector by an axioelectric effect. A conservative upper limit on the hadronic axion mass m_a < 334 eV at 95% C.L. is obt
Externí odkaz:
http://arxiv.org/abs/0807.3482
Publikováno v:
Phys.Rev.D78:127101,2008
In this experiment we aim to detect Kaluza-Klein (KK) excitations of the bulk gauge field, emitted in a bremsstrahlung process on solar plasma constituents, by looking at a process analogous to the photoelectric effect inside the HPGe detector. Using
Externí odkaz:
http://arxiv.org/abs/0804.1659