Results 91 to 100 of about 4,173,231 (371)

DARK MATTER, AND ITS DARKNESS [PDF]

International Journal of Modern Physics D, 2006
Assuming the validity of the general relativistic description of gravitation on astrophysical and cosmological length scales, we analytically infer that the Friedmann–Robertson–Walker cosmology with Einsteinian cosmological constant, and a vanishing spatial curvature constant, unambiguously requires a significant amount of dark matter.
openaire   +3 more sources

Archaeal protein containing domain of unknown function 2193 undergoes oligomeric reconfiguration upon iron–sulfur cluster binding

FEBS Letters, EarlyView.
This work presents the characterization of MvoDUF2193, a Methanococcus voltae (Mvo) protein from the domain of unknown function (DUF) 2193 family. We demonstrate that MvoDUF2193 binds a single [4Fe–4S] cluster per subunit and that cluster occupancy regulates the transition from an apo tetramer to a [4Fe–4S] monomeric form. This structural transition is
Emily M. Dieter, James Larson, Monika Tokmina‐Lukaszewska, Jin Xiong, Jared Green, Yisong Guo, William E. Broderick, Brian Bothner, Joan B. Broderick   +8 more
wiley   +1 more source

Muonphilic dark matter explanation of gamma-ray galactic center excess: a comprehensive analysis

Journal of High Energy Physics, 2022
The Galactic center gamma-ray excess (GCE) is a long-standing unsolved problem. One of candidate solutions, the dark matter (DM) annihilation, has been recently tested with other astrophysical observations, such as AMS-02 electron-positron spectra, Fermi
Murat Abdughani, Yi-Zhong Fan, Chih-Ting Lu, Tian-Peng Tang, Yue-Lin Sming Tsai   +4 more
doaj   +1 more source

Direct and indirect detection of dissipative dark matter

, 2014
We study the constraints from direct detection and solar capture on dark matter scenarios with a subdominant dissipative component. This dissipative dark matter component in general has both a symmetric and asymmetric relic abundance.
Fan, JiJi, Katz, Andrey, Shelton, Jessie
core   +1 more source

Impact of dark matter decays and annihilations on reionization [PDF]

, 2006
One of the possible methods to distinguish among various dark matter candidates is to study the effects of dark matter decays. We consider four different dark matter candidates (light dark matter, gravitinos, neutralinos and sterile neutrinos), for each ...
A. Ferrara, Abazajian, Ascasibar, Bauer, Beacom, Bertone, Biermann, Bode, Boehm, Cassé, Chen, Colafrancesco, Colombi, Dermer, Dolgov, Dolgov, E. Pierpaoli, Hansen, Hinshaw, Hooper, Kasuya, Kasuya, Kasuya, Kasuya, Kawasaki, Knödlseder, M. Mapelli, Mapelli, Nowakowski, Ostriker, Padmanabhan, Padmanabhan, Page, Palla, Pierpaoli, Sciama, Seager, Seager, Seljak, Seljak, Seljak, Shchekinov, Sommer-Larsen, Spergel, Spergel, Viel, Zhang   +46 more
core   +3 more sources

Dichromatic dark matter [PDF]

Journal of High Energy Physics, 2013
Abstract Both the robust INTEGRAL 511 keV gamma-ray line and the recent tentative hint of the 135 GeV gamma-ray line from Fermi-LAT have similar signal morphologies, and may be produced from the same dark matter annihilation. Motivated by this observation, we construct a dark matter model to explain both signals and to accommodate ...
Meng Su, Meng Su, Yue Zhao, Yue Zhao, Yang Bai, Yang Bai   +5 more
openaire   +7 more sources

Redox‐dependent binding and conformational equilibria govern the fluorescence decay of NAD(P)H in living cells

FEBS Letters, EarlyView.
In this work, we reveal how different enzyme binding configurations influence the fluorescence decay of NAD(P)H in live cells using time‐resolved anisotropy imaging and fluorescence lifetime imaging microscopy (FLIM). Mathematical modelling shows that the redox states of the NAD and NADP pools govern these configurations, shaping their fluorescence ...
Thomas S. Blacker, Nimit Mistry, Nicoletta Plotegher, Elizabeth R. Westbrook, Michael D. E. Sewell, John Carroll, Gyorgy Szabadkai, Angus J. Bain, Michael R. Duchen   +8 more
wiley   +1 more source

Strong first order electroweak phase transition in 2HDM confronting future Z & Higgs factories

Journal of High Energy Physics, 2021
The electroweak phase transition can be made first order by extending the Standard Model (SM) Higgs sector with extra scalars. The same new physics can explain the matter-antimatter asymmetry of the universe by supplying an extra source of CP violation ...
Wei Su, Anthony G. Williams, Mengchao Zhang   +2 more
doaj   +1 more source

Dark Matter Search in Missing Energy Events with NA64. [PDF]

Physical Review Letters, 2019
A search for sub-GeV dark matter production mediated by a new vector boson A^{'}, called a dark photon, is performed by the NA64 experiment in missing energy events from 100 GeV electron interactions in an active beam dump at the CERN SPS.
D. Banerjee, V. Burtsev, A. Chumakov, D. Cooke, P. Crivelli, E. Depero, A. Dermenev, S. Donskov, R. Dusaev, T. Enik, N. Charitonidis, A. Feshchenko, V. Frolov, A. Gardikiotis, S. Gerassimov, S. Gninenko, M. Hösgen, M. Jeckel, A. Karneyeu, G. Kekelidze, B. Ketzer, D. Kirpichnikov, M. Kirsanov, I. Konorov, S. Kovalenko, V. Kramarenko, L. Kravchuk, N. Krasnikov, S. Kuleshov, V. Lyubovitskij, V. Lysan, V. Matveev, Y. Mikhailov, L. Molina Bueno, D. Peshekhonov, V. Polyakov, B. Radics, R. Rojas, A. Rubbia, V. Samoylenko, D. Shchukin, V. Tikhomirov, I. Tlisova, D. Tlisov, A. Toropin, A. Trifonov, B. Vasilishin, G. Vasquez Arenas, P. Volkov, V. Volkov, P. Ulloa   +50 more
semanticscholar   +1 more source

How Cold is Cold Dark Matter?

, 2014
If cold dark matter consists of particles, these must be non-interacting and non-relativistic by definition. In most cold dark matter models however, dark matter particles inherit a non-vanishing velocity dispersion from interactions in the early ...
Armendariz-Picon, Cristian, Neelakanta, Jayanth T.   +1 more
core   +1 more source