Zobrazeno 1 - 10
of 32
pro vyhledávání: '"D. V. Nanopoulos"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 4, Pp 1-23 (2022)
Abstract In a recent paper, we identified a cosmological sector of a flipped SU(5) model derived in the free fermionic formulation of the heterotic superstring, containing the inflaton and the goldstino superfields with a superpotential leading to St
Externí odkaz:
https://doaj.org/article/a73318e576c740b69ec1c4084a882c27
Autor:
D. V. Nanopoulos
Publikováno v:
Modern Physics Letters A. 25:3335-3346
In supercritical string cosmology (SSC), a time-dependent dilaton leads to a smoothly evolving dark energy and modifies the regions of the mSUGRA parameter space where the observed value of the dark matter relic density may be obtained. In particular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58d71eae498030338138ff9dd4ec895f
https://doi.org/10.1142/s0217732310034638
https://doi.org/10.1142/s0217732310034638
Publikováno v:
Physical Review D. 89
We propose a minimal model framework for physics below the Planck scale with the following features: (i) it is based on no-scale supergravity, as favoured in many string compactifications, (ii) it incorporates Starobinsky-like inflation, and hence is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24e2d5238bd4bab8526f8b7b0d2d7546
https://doi.org/10.1103/physrevd.89.043502
https://doi.org/10.1103/physrevd.89.043502
Publikováno v:
General Relativity and Gravitation. 32:943-958
We consider cosmology in the framework of a `material reference system' of D particles, including the effects of quantum recoil induced by closed-string probe particles. We find a time-dependent contribution to the cosmological vacuum energy, which r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a994b4127a054ad5970e16d77217e447
https://doi.org/10.1023/a:1001993226227
https://doi.org/10.1023/a:1001993226227
Publikováno v:
International Journal of Modern Physics A. 15:1345-1362
We study the elliptic fibrations of some Calabi–Yau threefolds, including the Z2×Z2 orbifold with (h1,1,h2,1)=(27, 3), which is equivalent to the common framework of realistic free-fermion models, as well as related orbifold models with (h1,1,h2,1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00c80cbb9519378c699b80df7b47acea
https://doi.org/10.1142/s0217751x00000598
https://doi.org/10.1142/s0217751x00000598
Autor:
Eleftherios Papantonopoulos, D. V. Nanopoulos, G.A. Diamandis, B.C. Georgalas, John Ellis, Nick E. Mavromatos
Publikováno v:
International Journal of Modern Physics A. 13:4265-4279
We show that an exact solution of two-dimensional dilaton gravity with matter discovered previously exhibits an irreversible temporal flow towards flat space with a vanishing cosmological constant. This time flow is induced by the back reaction of ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e8ffcbe6b4c9928384e61fdcedd0c8d
https://doi.org/10.1142/s0217751x98002055
https://doi.org/10.1142/s0217751x98002055
Publikováno v:
Modern Physics Letters A. 13:303-319
We discuss the scattering of two light particles in a D-brane background. It is known that, if one light particle strikes the D brane at small impact parameter, quantum recoil effects induce entanglement entropy in both the excited D brane and the sc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f99135c07b0ff29824448ad63b2c855a
https://doi.org/10.1142/s021773239800036x
https://doi.org/10.1142/s021773239800036x
We demonstrate the existence of an extra nonanomalous U(1) gauge symmetry in a three-generation Pati-Salam model constructed with intersecting D6-branes in Type IIA string theory on a T^6/(Z_2 \times Z_2) orientifold. This extra U(1) forbids all dime
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f57d5c5d82b640b67a2c53b07a89500
We discuss the phenomenology of Supercritical String Cosmology (SSC) in the context of Dark Matter constraints on supersymmetric particle physics models at LHC. We also link our results with recent findings of the MAGIC, H.E.S.S. and Fermi Telescopes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bb368b6666af19a396fbf930ab1a79f
http://arxiv.org/abs/0902.1507
http://arxiv.org/abs/0902.1507
Autor:
D. V. Nanopoulos
Publikováno v:
Lecture Notes in Physics ISBN: 9783540078661
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::beea869062af4bb80297dc4049d9d855
https://doi.org/10.1007/3-540-07866-5_27
https://doi.org/10.1007/3-540-07866-5_27