keyword
MENU ▼
Read by QxMD icon Read
search

Cosmology

keyword
https://www.readbyqxmd.com/read/28515671/likelihood-analysis-of-the-minimal-amsb-model
#1
E Bagnaschi, M Borsato, K Sakurai, O Buchmueller, R Cavanaugh, V Chobanova, M Citron, J C Costa, A De Roeck, M J Dolan, J R Ellis, H Flächer, S Heinemeyer, G Isidori, M Lucio, F Luo, D Martínez Santos, K A Olive, A Richards, G Weiglein
We perform a likelihood analysis of the minimal anomaly-mediated supersymmetry-breaking (mAMSB) model using constraints from cosmology and accelerator experiments. We find that either a wino-like or a Higgsino-like neutralino LSP, [Formula: see text], may provide the cold dark matter (DM), both with similar likelihoods. The upper limit on the DM density from Planck and other experiments enforces [Formula: see text] after the inclusion of Sommerfeld enhancement in its annihilations. If most of the cold DM density is provided by the [Formula: see text], the measured value of the Higgs mass favours a limited range of [Formula: see text] (and also for [Formula: see text] if [Formula: see text]) but the scalar mass [Formula: see text] is poorly constrained...
2017: European Physical Journal. C, Particles and Fields
https://www.readbyqxmd.com/read/28474927/measurement-of-a-cosmographic-distance-ratio-with-galaxy-and-cosmic-microwave-background-lensing
#2
Hironao Miyatake, Mathew S Madhavacheril, Neelima Sehgal, Anže Slosar, David N Spergel, Blake Sherwin, Alexander van Engelen
We measure the gravitational lensing shear signal around dark matter halos hosting constant mass galaxies using light sources at z∼1 (background galaxies) and at the surface of last scattering at z∼1100 (the cosmic microwave background). The galaxy shear measurement uses data from the CFHTLenS survey, and the microwave background shear measurement uses data from the Planck satellite. The ratio of shears from these cross-correlations provides a purely geometric distance measurement across the longest possible cosmological lever arm...
April 21, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28452538/digging-deeper-observing-primordial-gravitational-waves-below-the-binary-black-hole-produced-stochastic-background
#3
T Regimbau, M Evans, N Christensen, E Katsavounidis, B Sathyaprakash, S Vitale
The merger rate of black hole binaries inferred from the detections in the first Advanced LIGO science run implies that a stochastic background produced by a cosmological population of mergers will likely mask the primordial gravitational wave background. Here we demonstrate that the next generation of ground-based detectors, such as the Einstein Telescope and Cosmic Explorer, will be able to observe binary black hole mergers throughout the Universe with sufficient efficiency that the confusion background can potentially be subtracted to observe the primordial background at the level of Ω_{GW}≃10^{-13} after 5 years of observation...
April 14, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28450639/measurement-of-the-small-scale-structure-of-the-intergalactic-medium-using-close-quasar-pairs
#4
Alberto Rorai, Joseph F Hennawi, Jose Oñorbe, Martin White, J Xavier Prochaska, Girish Kulkarni, Michael Walther, Zarija Lukić, Khee-Gan Lee
The distribution of diffuse gas in the intergalactic medium (IGM) imprints a series of hydrogen absorption lines on the spectra of distant background quasars known as the Lyman-α forest. Cosmological hydrodynamical simulations predict that IGM density fluctuations are suppressed below a characteristic scale where thermal pressure balances gravity. We measured this pressure-smoothing scale by quantifying absorption correlations in a sample of close quasar pairs. We compared our measurements to hydrodynamical simulations, where pressure smoothing is determined by the integrated thermal history of the IGM...
April 28, 2017: Science
https://www.readbyqxmd.com/read/28430462/fuzzy-dark-matter-from-infrared-confining-dynamics
#5
Hooman Davoudiasl, Christopher W Murphy
A very light boson of mass O(10^{-22})  eV may potentially be a viable dark matter (DM) candidate, which can avoid phenomenological problems associated with cold DM. Such "fuzzy DM (FDM)" may naturally be an axion with a decay constant f_{a}∼10^{16}-10^{18}  GeV and a mass m_{a}∼μ^{2}/f_{a} with μ∼10^{2}  eV. Here, we propose a concrete model, where μ arises as a dynamical scale from infrared confining dynamics, analogous to QCD. Our model is an alternative to the usual approach of generating μ through string theoretic instanton effects...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28409957/background-independence-and-duality-invariance-in-string-theory
#6
Olaf Hohm
Closed string theory exhibits an O(D,D) duality symmetry on tori, which in double field theory is manifest before compactification. I prove that to first order in α^{'} there is no manifestly background independent and duality invariant formulation of bosonic string theory in terms of a metric, b field, and dilaton. To this end I use O(D,D) invariant second order perturbation theory around flat space to show that the unique background independent candidate expression for the gauge algebra at order α^{'} is inconsistent with the Jacobi identity...
March 31, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28409946/geometric-baryogenesis-from-shift-symmetry
#7
Andrea De Simone, Takeshi Kobayashi, Stefano Liberati
We present a new scenario for generating the baryon asymmetry of the Universe that is induced by a Nambu-Goldstone (NG) boson. The shift symmetry naturally controls the operators in the theory while allowing the NG boson to couple to the spacetime geometry as well as to the baryons. The cosmological background thus sources a coherent motion of the NG boson, which leads to baryogenesis. Good candidates of the baryon-generating NG boson are the QCD axion and axionlike fields. In these cases, the axion induces baryogenesis in the early Universe and can also serve as dark matter in the late Universe...
March 31, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28409943/probing-the-scale-invariance-of-the-inflationary-power-spectrum-in-expanding-quasi-two-dimensional-dipolar-condensates
#8
Seok-Yeong Chä, Uwe R Fischer
We consider an analogue de Sitter cosmos in an expanding quasi-two-dimensional Bose-Einstein condensate with dominant dipole-dipole interactions between the atoms or molecules in the ultracold gas. It is demonstrated that a hallmark signature of inflationary cosmology, the scale invariance of the power spectrum of inflaton field correlations, experiences strong modifications when, at the initial stage of expansion, the excitation spectrum displays a roton minimum. Dipolar quantum gases thus furnish a viable laboratory tool to experimentally investigate, with well-defined and controllable initial conditions, whether primordial oscillation spectra deviating from Lorentz invariance at trans-Planckian momenta violate standard predictions of inflationary cosmology...
March 31, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28397781/measurement-of-the-cosmic-optical-background-using-the-long-range-reconnaissance-imager-on-new-horizons
#9
Michael Zemcov, Poppy Immel, Chi Nguyen, Asantha Cooray, Carey M Lisse, Andrew R Poppe
The cosmic optical background is an important observable that constrains energy production in stars and more exotic physical processes in the universe, and provides a crucial cosmological benchmark against which to judge theories of structure formation. Measurement of the absolute brightness of this background is complicated by local foregrounds like the Earth's atmosphere and sunlight reflected from local interplanetary dust, and large discrepancies in the inferred brightness of the optical background have resulted...
April 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/28388180/upper-limits-on-the-stochastic-gravitational-wave-background-from-advanced-ligo-s-first-observing-run
#10
B P Abbott, R Abbott, T D Abbott, M R Abernathy, F Acernese, K Ackley, C Adams, T Adams, P Addesso, R X Adhikari, V B Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, O D Aguiar, L Aiello, A Ain, P Ajith, B Allen, A Allocca, P A Altin, A Ananyeva, S B Anderson, W G Anderson, S Appert, K Arai, M C Araya, J S Areeda, N Arnaud, K G Arun, S Ascenzi, G Ashton, M Ast, S M Aston, P Astone, P Aufmuth, C Aulbert, A Avila-Alvarez, S Babak, P Bacon, M K M Bader, P T Baker, F Baldaccini, G Ballardin, S W Ballmer, J C Barayoga, S E Barclay, B C Barish, D Barker, F Barone, B Barr, L Barsotti, M Barsuglia, D Barta, J Bartlett, I Bartos, R Bassiri, A Basti, J C Batch, C Baune, V Bavigadda, M Bazzan, C Beer, M Bejger, I Belahcene, M Belgin, A S Bell, B K Berger, G Bergmann, C P L Berry, D Bersanetti, A Bertolini, J Betzwieser, S Bhagwat, R Bhandare, I A Bilenko, G Billingsley, C R Billman, J Birch, R Birney, O Birnholtz, S Biscans, A S Biscoveanu, A Bisht, M Bitossi, C Biwer, M A Bizouard, J K Blackburn, J Blackman, C D Blair, D G Blair, R M Blair, S Bloemen, O Bock, M Boer, G Bogaert, A Bohe, F Bondu, R Bonnand, B A Boom, R Bork, V Boschi, S Bose, Y Bouffanais, A Bozzi, C Bradaschia, P R Brady, V B Braginsky, M Branchesi, J E Brau, T Briant, A Brillet, M Brinkmann, V Brisson, P Brockill, J E Broida, A F Brooks, D A Brown, D D Brown, N M Brown, S Brunett, C C Buchanan, A Buikema, T Bulik, H J Bulten, A Buonanno, D Buskulic, C Buy, R L Byer, M Cabero, L Cadonati, G Cagnoli, C Cahillane, J Calderón Bustillo, T A Callister, E Calloni, J B Camp, W Campbell, M Canepa, K C Cannon, H Cao, J Cao, C D Capano, E Capocasa, F Carbognani, S Caride, J Casanueva Diaz, C Casentini, S Caudill, M Cavaglià, F Cavalier, R Cavalieri, G Cella, C B Cepeda, L Cerboni Baiardi, G Cerretani, E Cesarini, S J Chamberlin, M Chan, S Chao, P Charlton, E Chassande-Mottin, B D Cheeseboro, H Y Chen, Y Chen, H-P Cheng, A Chincarini, A Chiummo, T Chmiel, H S Cho, M Cho, J H Chow, N Christensen, Q Chu, A J K Chua, S Chua, S Chung, G Ciani, F Clara, J A Clark, F Cleva, C Cocchieri, E Coccia, P-F Cohadon, A Colla, C G Collette, L Cominsky, M Constancio, L Conti, S J Cooper, T R Corbitt, N Cornish, A Corsi, S Cortese, C A Costa, E Coughlin, M W Coughlin, S B Coughlin, J-P Coulon, S T Countryman, P Couvares, P B Covas, E E Cowan, D M Coward, M J Cowart, D C Coyne, R Coyne, J D E Creighton, T D Creighton, J Cripe, S G Crowder, T J Cullen, A Cumming, L Cunningham, E Cuoco, T Dal Canton, S L Danilishin, S D'Antonio, K Danzmann, A Dasgupta, C F Da Silva Costa, V Dattilo, I Dave, M Davier, G S Davies, D Davis, E J Daw, B Day, R Day, S De, D DeBra, G Debreczeni, J Degallaix, M De Laurentis, S Deléglise, W Del Pozzo, T Denker, T Dent, V Dergachev, R De Rosa, R T DeRosa, R DeSalvo, J Devenson, R C Devine, S Dhurandhar, M C Díaz, L Di Fiore, M Di Giovanni, T Di Girolamo, A Di Lieto, S Di Pace, I Di Palma, A Di Virgilio, Z Doctor, V Dolique, F Donovan, K L Dooley, S Doravari, I Dorrington, R Douglas, M Dovale Álvarez, T P Downes, M Drago, R W P Drever, J C Driggers, Z Du, M Ducrot, S E Dwyer, T B Edo, M C Edwards, A Effler, H-B Eggenstein, P Ehrens, J Eichholz, S S Eikenberry, R C Essick, Z Etienne, T Etzel, M Evans, T M Evans, R Everett, M Factourovich, V Fafone, H Fair, S Fairhurst, X Fan, S Farinon, B Farr, W M Farr, E J Fauchon-Jones, M Favata, M Fays, H Fehrmann, M M Fejer, A Fernández Galiana, I Ferrante, E C Ferreira, F Ferrini, F Fidecaro, I Fiori, D Fiorucci, R P Fisher, R Flaminio, M Fletcher, H Fong, S S Forsyth, J-D Fournier, S Frasca, F Frasconi, Z Frei, A Freise, R Frey, V Frey, E M Fries, P Fritschel, V V Frolov, P Fulda, M Fyffe, H Gabbard, B U Gadre, S M Gaebel, J R Gair, L Gammaitoni, S G Gaonkar, F Garufi, G Gaur, V Gayathri, N Gehrels, G Gemme, E Genin, A Gennai, J George, L Gergely, V Germain, S Ghonge, Abhirup Ghosh, Archisman Ghosh, S Ghosh, J A Giaime, K D Giardina, A Giazotto, K Gill, A Glaefke, E Goetz, R Goetz, L Gondan, G González, J M Gonzalez Castro, A Gopakumar, M L Gorodetsky, S E Gossan, M Gosselin, R Gouaty, A Grado, C Graef, M Granata, A Grant, S Gras, C Gray, G Greco, A C Green, P Groot, H Grote, S Grunewald, G M Guidi, X Guo, A Gupta, M K Gupta, K E Gushwa, E K Gustafson, R Gustafson, J J Hacker, B R Hall, E D Hall, G Hammond, M Haney, M M Hanke, J Hanks, C Hanna, M D Hannam, J Hanson, T Hardwick, J Harms, G M Harry, I W Harry, M J Hart, M T Hartman, C-J Haster, K Haughian, J Healy, A Heidmann, M C Heintze, H Heitmann, P Hello, G Hemming, M Hendry, I S Heng, J Hennig, J Henry, A W Heptonstall, M Heurs, S Hild, D Hoak, D Hofman, K Holt, D E Holz, P Hopkins, J Hough, E A Houston, E J Howell, Y M Hu, E A Huerta, D Huet, B Hughey, S Husa, S H Huttner, T Huynh-Dinh, N Indik, D R Ingram, R Inta, H N Isa, J-M Isac, M Isi, T Isogai, B R Iyer, K Izumi, T Jacqmin, K Jani, P Jaranowski, S Jawahar, F Jiménez-Forteza, W W Johnson, D I Jones, R Jones, R J G Jonker, L Ju, J Junker, C V Kalaghatgi, V Kalogera, S Kandhasamy, G Kang, J B Kanner, S Karki, K S Karvinen, M Kasprzack, E Katsavounidis, W Katzman, S Kaufer, T Kaur, K Kawabe, F Kéfélian, D Keitel, D B Kelley, R Kennedy, J S Key, F Y Khalili, I Khan, S Khan, Z Khan, E A Khazanov, N Kijbunchoo, Chunglee Kim, J C Kim, Whansun Kim, W Kim, Y-M Kim, S J Kimbrell, E J King, P J King, R Kirchhoff, J S Kissel, B Klein, L Kleybolte, S Klimenko, P Koch, S M Koehlenbeck, S Koley, V Kondrashov, A Kontos, M Korobko, W Z Korth, I Kowalska, D B Kozak, C Krämer, V Kringel, A Królak, G Kuehn, P Kumar, R Kumar, L Kuo, A Kutynia, B D Lackey, M Landry, R N Lang, J Lange, B Lantz, R K Lanza, A Lartaux-Vollard, P D Lasky, M Laxen, A Lazzarini, C Lazzaro, P Leaci, S Leavey, E O Lebigot, C H Lee, H K Lee, H M Lee, K Lee, J Lehmann, A Lenon, M Leonardi, J R Leong, N Leroy, N Letendre, Y Levin, T G F Li, A Libson, T B Littenberg, J Liu, N A Lockerbie, A L Lombardi, L T London, J E Lord, M Lorenzini, V Loriette, M Lormand, G Losurdo, J D Lough, G Lovelace, H Lück, A P Lundgren, R Lynch, Y Ma, S Macfoy, B Machenschalk, M MacInnis, D M Macleod, F Magaña-Sandoval, E Majorana, I Maksimovic, V Malvezzi, N Man, V Mandic, V Mangano, G L Mansell, M Manske, M Mantovani, F Marchesoni, F Marion, S Márka, Z Márka, A S Markosyan, E Maros, F Martelli, L Martellini, I W Martin, D V Martynov, K Mason, A Masserot, T J Massinger, M Masso-Reid, S Mastrogiovanni, A Matas, F Matichard, L Matone, N Mavalvala, N Mazumder, R McCarthy, D E McClelland, S McCormick, C McGrath, S C McGuire, G McIntyre, J McIver, D J McManus, T McRae, S T McWilliams, D Meacher, G D Meadors, J Meidam, A Melatos, G Mendell, D Mendoza-Gandara, R A Mercer, E L Merilh, M Merzougui, S Meshkov, C Messenger, C Messick, R Metzdorff, P M Meyers, F Mezzani, H Miao, C Michel, H Middleton, E E Mikhailov, L Milano, A L Miller, A Miller, B B Miller, J Miller, M Millhouse, Y Minenkov, J Ming, S Mirshekari, C Mishra, S Mitra, V P Mitrofanov, G Mitselmakher, R Mittleman, A Moggi, M Mohan, S R P Mohapatra, M Montani, B C Moore, C J Moore, D Moraru, G Moreno, S R Morriss, B Mours, C M Mow-Lowry, G Mueller, A W Muir, Arunava Mukherjee, D Mukherjee, S Mukherjee, N Mukund, A Mullavey, J Munch, E A M Muniz, P G Murray, A Mytidis, K Napier, I Nardecchia, L Naticchioni, G Nelemans, T J N Nelson, M Neri, M Nery, A Neunzert, J M Newport, G Newton, T T Nguyen, A B Nielsen, S Nissanke, A Nitz, A Noack, F Nocera, D Nolting, M E N Normandin, L K Nuttall, J Oberling, E Ochsner, E Oelker, G H Ogin, J J Oh, S H Oh, F Ohme, M Oliver, P Oppermann, Richard J Oram, B O'Reilly, R O'Shaughnessy, D J Ottaway, H Overmier, B J Owen, A E Pace, J Page, A Pai, S A Pai, J R Palamos, O Palashov, C Palomba, A Pal-Singh, H Pan, C Pankow, F Pannarale, B C Pant, F Paoletti, A Paoli, M A Papa, H R Paris, W Parker, D Pascucci, A Pasqualetti, R Passaquieti, D Passuello, B Patricelli, B L Pearlstone, M Pedraza, R Pedurand, L Pekowsky, A Pele, S Penn, C J Perez, A Perreca, L M Perri, H P Pfeiffer, M Phelps, O J Piccinni, M Pichot, F Piergiovanni, V Pierro, G Pillant, L Pinard, I M Pinto, M Pitkin, M Poe, R Poggiani, P Popolizio, A Post, J Powell, J Prasad, J W W Pratt, V Predoi, T Prestegard, M Prijatelj, M Principe, S Privitera, G A Prodi, L G Prokhorov, O Puncken, M Punturo, P Puppo, M Pürrer, H Qi, J Qin, S Qiu, V Quetschke, E A Quintero, R Quitzow-James, F J Raab, D S Rabeling, H Radkins, P Raffai, S Raja, C Rajan, M Rakhmanov, P Rapagnani, V Raymond, M Razzano, V Re, J Read, T Regimbau, L Rei, S Reid, D H Reitze, H Rew, S D Reyes, E Rhoades, F Ricci, K Riles, M Rizzo, N A Robertson, R Robie, F Robinet, A Rocchi, L Rolland, J G Rollins, V J Roma, J D Romano, R Romano, J H Romie, D Rosińska, S Rowan, A Rüdiger, P Ruggi, K Ryan, S Sachdev, T Sadecki, L Sadeghian, M Sakellariadou, L Salconi, M Saleem, F Salemi, A Samajdar, L Sammut, L M Sampson, E J Sanchez, V Sandberg, J R Sanders, B Sassolas, B S Sathyaprakash, P R Saulson, O Sauter, R L Savage, A Sawadsky, P Schale, J Scheuer, S Schlassa, E Schmidt, J Schmidt, P Schmidt, R Schnabel, R M S Schofield, A Schönbeck, E Schreiber, D Schuette, B F Schutz, S G Schwalbe, J Scott, S M Scott, D Sellers, A S Sengupta, D Sentenac, V Sequino, A Sergeev, Y Setyawati, D A Shaddock, T J Shaffer, M S Shahriar, B Shapiro, P Shawhan, A Sheperd, D H Shoemaker, D M Shoemaker, K Siellez, X Siemens, M Sieniawska, D Sigg, A D Silva, A Singer, L P Singer, A Singh, R Singh, A Singhal, A M Sintes, B J J Slagmolen, B Smith, J R Smith, R J E Smith, E J Son, B Sorazu, F Sorrentino, T Souradeep, A P Spencer, A K Srivastava, A Staley, M Steinke, J Steinlechner, S Steinlechner, D Steinmeyer, B C Stephens, S P Stevenson, R Stone, K A Strain, N Straniero, G Stratta, S E Strigin, R Sturani, A L Stuver, T Z Summerscales, L Sun, S Sunil, P J Sutton, B L Swinkels, M J Szczepańczyk, M Tacca, D Talukder, D B Tanner, D Tao, M Tápai, A Taracchini, R Taylor, T Theeg, E G Thomas, M Thomas, P Thomas, K A Thorne, E Thrane, T Tippens, S Tiwari, V Tiwari, K V Tokmakov, K Toland, C Tomlinson, M Tonelli, Z Tornasi, C I Torrie, D Töyrä, F Travasso, G Traylor, D Trifirò, J Trinastic, M C Tringali, L Trozzo, M Tse, R Tso, M Turconi, D Tuyenbayev, D Ugolini, C S Unnikrishnan, A L Urban, S A Usman, H Vahlbruch, G Vajente, G Valdes, N van Bakel, M van Beuzekom, J F J van den Brand, C Van Den Broeck, D C Vander-Hyde, L van der Schaaf, J V van Heijningen, A A van Veggel, M Vardaro, V Varma, S Vass, M Vasúth, A Vecchio, G Vedovato, J Veitch, P J Veitch, K Venkateswara, G Venugopalan, D Verkindt, F Vetrano, A Viceré, A D Viets, S Vinciguerra, D J Vine, J-Y Vinet, S Vitale, T Vo, H Vocca, C Vorvick, D V Voss, W D Vousden, S P Vyatchanin, A R Wade, L E Wade, M Wade, M Walker, L Wallace, S Walsh, G Wang, H Wang, M Wang, Y Wang, R L Ward, J Warner, M Was, J Watchi, B Weaver, L-W Wei, M Weinert, A J Weinstein, R Weiss, L Wen, P Weßels, T Westphal, K Wette, J T Whelan, B F Whiting, C Whittle, D Williams, R D Williams, A R Williamson, J L Willis, B Willke, M H Wimmer, W Winkler, C C Wipf, H Wittel, G Woan, J Woehler, J Worden, J L Wright, D S Wu, G Wu, W Yam, H Yamamoto, C C Yancey, M J Yap, Hang Yu, Haocun Yu, M Yvert, A Zadrożny, L Zangrando, M Zanolin, J-P Zendri, M Zevin, L Zhang, M Zhang, T Zhang, Y Zhang, C Zhao, M Zhou, Z Zhou, S J Zhu, X J Zhu, M E Zucker, J Zweizig
A wide variety of astrophysical and cosmological sources are expected to contribute to a stochastic gravitational-wave background. Following the observations of GW150914 and GW151226, the rate and mass of coalescing binary black holes appear to be greater than many previous expectations. As a result, the stochastic background from unresolved compact binary coalescences is expected to be particularly loud. We perform a search for the isotropic stochastic gravitational-wave background using data from Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run...
March 24, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28339250/de-sitter-space-as-a-resonance
#11
Jonathan Maltz, Leonard Susskind
A quantum mechanical formulation of de Sitter cosmological spacetimes still eludes string theory. In this Letter we conjecture a potentially rigorous framework in which the status of de Sitter space is the same as that of a resonance in a scattering process. We conjecture that transition amplitudes between certain states with asymptotically supersymmetric flat vacua contain resonant pole characteristic metastable intermediate states. A calculation employing constrained instantons illustrates this idea.
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28320645/interactive-exploration-of-cosmological-dark-matter-simulation-data
#12
Aaron Scherzinger, Tobias Brix, Dominik Drees, Andreas Volker, Kiril Radkov, Niko Santalidis, Alexander Fieguth, Klaus H Hinrichs
The winning entry of the 2015 IEEE Scientific Visualization Contest, this article describes a visualization tool for cosmological data resulting from dark-matter simulations. The proposed system helps users explore all aspects of the data at once and receive more detailed information about structures of interest at any time. Moreover, novel methods for visualizing and interactively exploring dark-matter halo substructures are proposed.
March 2017: IEEE Computer Graphics and Applications
https://www.readbyqxmd.com/read/28306319/testing-the-speed-of-gravitational-waves-over-cosmological-distances-with-strong-gravitational-lensing
#13
Thomas E Collett, David Bacon
Probing the relative speeds of gravitational waves and light acts as an important test of general relativity and alternative theories of gravity. Measuring the arrival time of gravitational waves (GWs) and electromagnetic (EM) counterparts can be used to measure the relative speeds, but only if the intrinsic time lag between emission of the photons and gravitational waves is well understood. Here we suggest a method that does not make such an assumption, using future strongly lensed GW events and EM counterparts; Biesiada et al...
March 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28306299/graviton-mass-might-reduce-tension-between-early-and-late-time-cosmological-data
#14
Antonio De Felice, Shinji Mukohyama
The standard cold dark matter model with a cosmological constant (Λ-CDM) predicts a growth of structures which tends to be higher than the values of redshift space distortion (RSD) measurements if the cosmological parameters are fixed by the cosmic microwave background data. In this Letter, we point out that this discrepancy can be resolved or understood if we assume that the graviton has a small but nonzero mass. In the context of the minimal theory of massive gravity (MTMG), due to infrared Lorentz violations measurable only at present cosmological scales, the graviton acquires a mass without being haunted by unwanted extra degrees of freedom...
March 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28300118/strongly-baryon-dominated-disk-galaxies-at-the-peak-of-galaxy-formation-ten-billion-years-ago
#15
R Genzel, N M Förster Schreiber, H Übler, P Lang, T Naab, R Bender, L J Tacconi, E Wisnioski, S Wuyts, T Alexander, A Beifiori, S Belli, G Brammer, A Burkert, C M Carollo, J Chan, R Davies, M Fossati, A Galametz, S Genel, O Gerhard, D Lutz, J T Mendel, I Momcheva, E J Nelson, A Renzini, R Saglia, A Sternberg, S Tacchella, K Tadaki, D Wilman
In the cold dark matter cosmology, the baryonic components of galaxies-stars and gas-are thought to be mixed with and embedded in non-baryonic and non-relativistic dark matter, which dominates the total mass of the galaxy and its dark-matter halo. In the local (low-redshift) Universe, the mass of dark matter within a galactic disk increases with disk radius, becoming appreciable and then dominant in the outer, baryonic regions of the disks of star-forming galaxies. This results in rotation velocities of the visible matter within the disk that are constant or increasing with disk radius-a hallmark of the dark-matter model...
March 15, 2017: Nature
https://www.readbyqxmd.com/read/28277505/observation-of-a-discrete-time-crystal
#16
J Zhang, P W Hess, A Kyprianidis, P Becker, A Lee, J Smith, G Pagano, I-D Potirniche, A C Potter, A Vishwanath, N Y Yao, C Monroe
Spontaneous symmetry breaking is a fundamental concept in many areas of physics, including cosmology, particle physics and condensed matter. An example is the breaking of spatial translational symmetry, which underlies the formation of crystals and the phase transition from liquid to solid. Using the analogy of crystals in space, the breaking of translational symmetry in time and the emergence of a 'time crystal' was recently proposed, but was later shown to be forbidden in thermal equilibrium. However, non-equilibrium Floquet systems, which are subject to a periodic drive, can exhibit persistent time correlations at an emergent subharmonic frequency...
March 8, 2017: Nature
https://www.readbyqxmd.com/read/28276199/new-insights-into-a-hot-environment-for-early-life
#17
REVIEW
Jianghong Dai
Investigating the physical-chemical setting of early life is a challenging task. In this contribution, the author attempted to introduce a provocative concept from cosmology - cosmic microwave background (CMB), which is the residual thermal radiation from a hot early Universe - to the field. For this purpose, the author revisited a recently deduced biomarker, the 1,6-anhydro bond of sugars in bacteria. In vitro, the 1,6-anhydro bond of sugars reflects and captures residual thermal radiation in thermochemical processes and therefore is somewhat analogous to CMB...
March 9, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/28260983/noether-symmetry-approach-in-f-t-%C3%A2-b-teleparallel-cosmology
#18
Sebastian Bahamonde, Salvatore Capozziello
We consider the cosmology derived from f(T, B) gravity where T is the torsion scalar and [Formula: see text] a boundary term. In particular we discuss how it is possible to recover, under the same standard, the teleparallel f(T) gravity, the curvature f(R) gravity, and the teleparallel-curvature f(R, T) gravity, which are particular cases of f(T, B). We adopt the Noether Symmetry Approach to study the related dynamical systems and to find cosmological solutions.
2017: European Physical Journal. C, Particles and Fields
https://www.readbyqxmd.com/read/28260982/likelihood-analysis-of-supersymmetric-su-5-guts
#19
E Bagnaschi, J C Costa, K Sakurai, M Borsato, O Buchmueller, R Cavanaugh, V Chobanova, M Citron, A De Roeck, M J Dolan, J R Ellis, H Flächer, S Heinemeyer, G Isidori, M Lucio, D Martínez Santos, K A Olive, A Richards, K J de Vries, G Weiglein
We perform a likelihood analysis of the constraints from accelerator experiments and astrophysical observations on supersymmetric (SUSY) models with SU(5) boundary conditions on soft SUSY-breaking parameters at the GUT scale. The parameter space of the models studied has seven parameters: a universal gaugino mass [Formula: see text], distinct masses for the scalar partners of matter fermions in five- and ten-dimensional representations of SU(5), [Formula: see text] and [Formula: see text], and for the [Formula: see text] and [Formula: see text] Higgs representations [Formula: see text] and [Formula: see text], a universal trilinear soft SUSY-breaking parameter [Formula: see text], and the ratio of Higgs vevs [Formula: see text]...
2017: European Physical Journal. C, Particles and Fields
https://www.readbyqxmd.com/read/28256877/unifying-inflation-with-the-axion-dark-matter-baryogenesis-and-the-seesaw-mechanism
#20
Guillermo Ballesteros, Javier Redondo, Andreas Ringwald, Carlos Tamarit
A minimal extension of the standard model (SM) with a single new mass scale and providing a complete and consistent picture of particle physics and cosmology up to the Planck scale is presented. We add to the SM three right-handed SM-singlet neutrinos, a new vectorlike color triplet fermion, and a complex SM-singlet scalar σ that stabilizes the Higgs potential and whose vacuum expectation value at ∼10^{11}  GeV breaks lepton number and a Peccei-Quinn symmetry simultaneously. Primordial inflation is produced by a combination of σ (nonminimally coupled to the scalar curvature) and the SM Higgs boson...
February 17, 2017: Physical Review Letters
keyword
keyword
51256
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"