Results 61 to 70 of about 238,114 (290)

High energy cosmic-rays: puzzles, models, and giga-ton neutrino telescopes

, 2003
The existence of cosmic rays of energies exceeding 10^20 eV is one of the mysteries of high energy astrophysics. The spectrum and the high energy to which it extends rule out almost all suggested source models.
A Achterberg, A M Hillas, Arons, D Band, D Casper, D J Bird, D J Bird, E Boldt, E Waxman, E Waxman, E Waxman, E Waxman, E. Waxman, F Halzen, G L Fogli, G T Zatsepin, J Bednarz, J Bloom, J Hjorth, J N Bahcall, J N Bahcall, J N Bahcall, K Greisen, K Z Stanek, M Drees, M Milgrom, M Nagano, M Schmidt, M Vietri, N Hayashida, N N Efimov, P Bhattacharjee, P Mészáros, R Blandford, T Abu-Zayyad, T J Galama, T Piran, W I Axford, Y Fukuda   +38 more
core   +1 more source

Exposing and Challenging “Grit” in Physics Education

Science Education, EarlyView.
ABSTRACT In STEM education, grit is increasingly the focus of research, with scholars and educators seeking to develop and test interventions that will enhance persistence. As part of the special issue Centering Affect and Emotion Toward Justice and Dignity in Science Education, in this paper, we use interviews with 12 white physics faculty to show ...
Amy Robertson, Verónica N. Vélez, Trà Huynh, W. Tali Hairston   +3 more
wiley   +1 more source

Holographic entanglement entropy and complexity for the cosmological braneworld model

Journal of High Energy Physics
In a recent study [1], the time-dependent entanglement entropy of the universe undergoing expansion according to various power laws has been analyzed within the framework of the braneworld model. The results of the entanglement entropy in that paper take
Souvik Paul, Gopinath Guin, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

Tuning Ultra‐Narrow Direct Bandgap in α‐Sn Nanocrystals: A CMOS‐Compatible Approach for THz Applications

Small, EarlyView.
α‐Sn NPs of different sizes are stabilized on Si wafer by means of a CMOS‐compatible process employing microwave irradiation. Unprecedented tunability of the ultranarrow bandgap energy of α‐Sn between 64 and 137 meV (15–35 THz) due to quantum confinement is demonstrated.
Tiziano Bertoli, Elena Stellino, Francesco Minati, Camilla Belloni, Giovanni Tomassucci, Emanuele Bosco, Silvano Battisti, Leonardo Puppulin, Davide Cristofori, Vittorio Morandi, Francesca Rossi, Demetrio Logoteta, Alessandro Nucara, Luisa Barba, Gaetano Campi, Naurang Lal Saini, Fabrizio Palma, Pietro Riello, Michele Back, Fernanda Irrera   +19 more
wiley   +1 more source

Gauge interactions and the Galilean limit

European Physical Journal C: Particles and Fields
The gauge invariant minimal couplings for a class of relativistic free matter fields with global symmetry (related to usual charge conservation) have been obtained by incorporating an iterative Noether mechanism. Non-relativistic reduction of both matter
Ashis Saha, Rabin Banerjee, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

High-Energy and Ultra-High-Energy Neutrino Astrophysics

Universe
The origin of high-energy cosmic rays, and their behavior in astrophysical sources, remains an open question. Recently, new ways to address this question have been made possible by the observation of a new astrophysical messenger, namely neutrinos.
Damiano F. G. Fiorillo
doaj   +1 more source

Dissecting the knee - Air shower measurements with KASCADE

, 2003
Recent results of the KASCADE air shower experiment are presented in order to shed some light on the astrophysics of cosmic rays in the region of the knee in the energy spectrum.
A. Bercuci, A. Chilingarian, A. Haungs, A. Risse, A. Vardanyan, A. Weindl, A.F. Badea, Aglietta, Aglietta, Antoni, Antoni, Antoni, Antoni, Büttner, C. Büttner, Candia, D. Heck, Engler, F. Feßler, G. Maier, G. Schatz, Gerhard, H. Blümer, H. Bozdog, H. Rebel, H. Schieler, H. Ulrich, H.J. Gils, H.J. Mathes, H.J. Mayer, H.O. Klages, Hörandel, Hörandel, Hörandel, I.M. Brancus, J. Engler, J. Milke, J. Oehlschläger, J. Scholz, J. van Buren, J. Wochele, J. Zabierowski, J.R. Hörandel, K. Bekk, K. Daumiller, K.-H. Kampert, Kampert, Kifune, M. Müller, M. Petcu, M. Risse, M. Roth, Maier, Milke, Milke, Müller, Nagashima, P. Doll, R. Engel, R. Glasstetter, R. Obenland, Roth, Roth, S. Ostapchenko, Schatz, T. Antoni, T. Thouw, Ulrich, Ulrich, W.D. Apel   +69 more
core   +1 more source

Anomalous‐Energy Runaway Electrons Originating in Fast Ionisation Wave During Pulsed Gas Breakdown

High Voltage, EarlyView.
ABSTRACT Anomalous‐energy runaway electrons (RAEs), whose energy exceeds the maximum potential difference across the discharge gap, are widely observed in various plasma phenomena. This study investigates the origination of anomalous‐energy RAEs in fast ionisation waves (FIWs) formed during pulsed gas breakdown.
Bangdou Huang, Chenhua Ren, Cheng Zhang, Edl Schamiloglu, Tao Shao   +4 more
wiley   +1 more source

Investigating the role of mutual information in the Page curve for a functional renormalization group improved Schwarzschild black hole

European Physical Journal C: Particles and Fields
The present work delves into probing the importance of mutual information of relevant subsystems in obtaining the correct time-evolution of fine-grained entropy of Hawking radiation, as suggested by Page.
Ashis Saha, Anirban Roy Chowdhury, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

TA Spectrum [PDF]

EPJ Web of Conferences, 2019
The Telescope Array (TA) experiment is measuring cosmic rays of energies from PeV to 100 EeV and higher in the Northern hemisphere. TA has two parts: main TA and the TA low energy extension (TALE).
Ivanov Dmitri
doaj   +1 more source