Results 21 to 30 of about 7,111 (156)

DAMA/LIBRA-phase1 results and perspectives of the phase2

EPJ Web of Conferences, 2016
The DAMA/LIBRA experiment (∼ 250 kg of highly radio-pure NaI(Tl)) is running deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N.
Bernabei R., Belli P., Cappella F., Caracciolo V., Cerulli R., Dai C.J., d'Angelo A., d'Angelo S., Marco A. Di, He H.L., Incicchitti A., Kuang H.H., Ma X.H., Montecchia F., Sheng X.D., Wang R.G., Ye Z.P.   +16 more
doaj   +1 more source

Supergalactic Structure of Multiplets with the Telescope Array Surface Detector [PDF]

EPJ Web of Conferences, 2019
Evidence of supergalactic structure of multiplets has been found for ultra-high energy cosmic rays (UHECR) with energies above 1019 eV using 7 years of data from the Telescope Array (TA) surface detector.
Lundquist Jon Paul, Sokolsky Pierre V.
doaj   +1 more source

Decay of High-Energy Astrophysical Neutrinos [PDF]

Physical Review Letters, 2003
Existing limits on the non-radiative decay of one neutrino to another plus a massless particle (e.g., a singlet Majoron) are very weak. The best limits on the lifetime to mass ratio come from solar neutrino observations, and are $τ/m \agt 10^{-4}$ s/eV for the relevant mass eigenstate(s).
Beacom, John F., Bell, Nicole F., Hooper, Dan, Pakvasa, Sandip, Weiler, Thomas J.   +4 more
openaire   +3 more sources

Unveiling hidden millihertz quasi-periodic oscillations in 1A 0535+262

Astronomy & Astrophysics
Context. Be/X-ray binary pulsars exhibit transient outbursts and complex timing behaviour, including millihertz quasi-periodic oscillations (QPOs), whose physical origin and energy dependence remain poorly understood.
Yang Zihan, Ma Ruican, Méndez Mariano, Li Ze-Xi, Zhao Q. C., Li Panping, Tao Lian, Zhang Shuang-Nan, Zhang Liang, Feng Hua, Ma Xiang, Huang Yue   +11 more
doaj   +1 more source

High-energy photon polarimeter for astrophysics [PDF]

Journal of Astronomical Telescopes, Instruments, and Systems, 2018
A high-energy photon polarimeter for astrophysics studies in the energy range from 10 MeV to 800 MeV is considered. The proposed concept uses a stack of silicon micro-strip detectors where they play the roles of both a converter and a tracker. The purpose of this paper is to outline the parameters of such a polarimeter and to estimate the productivity ...
Eingorn, Maxim, Fernando, Lakma, Vlahovic, Branislav, Ilie, Cosmin, Wojtsekhowski, Bogdan, Urciuoli, Guido Maria, De Persio, Fulvio, Meddi, Franco, Nelyubin, Vladimir   +8 more
openaire   +2 more sources

Action principle of Galilean relativistic Proca theory

European Physical Journal C: Particles and Fields, 2023
In this paper, we discuss Galilean relativistic Proca theory in detail. We first provide a set of mapping relations, derived systematically, that connect the covariant and contravariant vectors in the Lorentz relativistic and Galilean relativistic ...
Rabin Banerjee, Soumya Bhattacharya
doaj   +1 more source

High-energy neutrino astrophysics: Status and perspectives [PDF]

Progress in Particle and Nuclear Physics, 2012
Neutrinos are unique cosmic messengers. Present attempts are directed to extend the window of cosmic neutrino observation from low energies (Sun, supernovae) to much higher energies. The aim is to study the most violent processes in the Universe which accelerate charged particles to highest energies, far beyond the reach of laboratory experiments on ...
Katz, U. F., Spiering, C.
openaire   +4 more sources

Constraining the Thickness of the Galactic Halo through Cosmic-Ray Anisotropy Using the Spatial-Dependent-Propagation Model

Universe, 2023
The spatial-dependent-propagation (SDP) model with a nearby source works well to reproduce the coevolving features of both cosmic-ray (CR)-nuclei spectra and anisotropy. However, it is well known that the Sun is actually deviating from the galactic disk.
Bing-Qiang Qiao, Yu-Hua Yao, Wei Liu, Qiang Yuan, Xiao-Jun Bi, Hong-Bo Hu, Yi-Qing Guo   +6 more
doaj   +1 more source

Highlights of DAMA/LIBRA

EPJ Web of Conferences, 2016
The DAMA project develops and uses new/improved low background scintillation detectors to investigate the Dark Matter (DM) particle component(s) in the galactic halo and rare processes deep underground at the Gran Sasso National Laboratory (LNGS) of the ...
Bernabei R., Belli P., d’Angelo A., d’Angelo S., Di Marco A., Montecchia F., Incicchitti A., Cappella F., Caracciolo V., Cerulli R., Dai C.J., He H.L., Kuang H.H., Ma X.H., Sheng X.D., Wang R.G., Ye Z.P.   +16 more
doaj   +1 more source

Vacuum stability and radiative symmetry breaking of the scale-invariant singlet extension of type II seesaw model

European Physical Journal C: Particles and Fields, 2023
The questions of the origin of electroweak symmetry breaking and neutrino mass are two major puzzles in particle physics. Neutrino mass generation requires new physics beyond the Standard Model and also suggests reconsideration of physics of symmetry ...
Bayu Dirgantara, Kristjan Kannike, Warintorn Sreethawong   +2 more
doaj   +1 more source