Results 131 to 140 of about 15,544,554 (381)

Saddle point inflation from f(R) theory

Physics Letters B, 2015
We analyse several saddle point inflationary scenarios based on power-law f(R) models. We investigate inflation resulting from f(R)=R+αnM2(1−n)Rn+αn+1M−2nRn+1 and f(R)=∑nlαnM2(1−n)Rn as well as l→∞ limit of the latter. In all cases we have found relation
Michał Artymowski, Zygmunt Lalak, Marek Lewicki   +2 more
doaj   +1 more source

General F-theory models with tuned (SU(3) × SU(2) × U(1))/ℤ6 symmetry

Journal of High Energy Physics, 2020
We construct a general form for an F-theory Weierstrass model over a general base giving a 6D or 4D supergravity theory with gauge group (SU(3) × SU(2) × U(1))/ℤ6 and generic associated matter, which includes the matter content of the standard model. The
Nikhil Raghuram, Washington Taylor, Andrew P. Turner   +2 more
doaj   +1 more source

F-theory on 6D symmetric toroidal orbifolds

Journal of High Energy Physics, 2022
In this work we study F-theory on symmetric toroidal orbifolds that exhibit roto-translations, which are point group rotations accompanied by fractional lattice shifts. These geometries admit a rich class of effects, such as twisted affine folded fibers,
Finn Bjarne Kohl, Magdalena Larfors, Paul-Konstantin Oehlmann   +2 more
doaj   +1 more source

BPS States in F-Theory [PDF]

arXiv, 1997
The spectra of BPS states in F-theory on elliptic fibred fourfolds are investigated.
arxiv  

Intersecting brane models and F-theory in six dimensions [PDF]

, 2012
We analyze six-dimensional supergravity theories coming from intersecting brane models on the toroidal orbifold T^4/Z_2. We use recently developed tools for mapping general 6D supergravity theories to F-theory to identify F-theory constructions dual to the intersecting brane models. The F-theory picture illuminates several aspects of these models.
arxiv   +1 more source

An action for F-theory: SL ( 2 ) R + exceptional field theory [PDF]

, 2015
We construct the 12-dimensional exceptional field theory (EFT) associated to the group SL ( 2 ) × R + . Demanding the closure of the algebra of local symmetries leads to a constraint, known as the section condition, that must be imposed on all fields ...
D. Berman, Chris D. A. Blair, E. Malek, F. Rudolph   +3 more
semanticscholar   +1 more source

A comparative study of circulating tumor cell isolation and enumeration technologies in lung cancer

Molecular Oncology, EarlyView.
Lung cancer cells were spiked into donor blood to evaluate the recovery rates of the following circulating tumor cell (CTC) enrichment technologies: CellMag™, EasySep™, RosetteSep™, Parsortix® PR1, and Parsortix® Prototype systems. Each method's advantages and disadvantages are described.
Volga M Saini, Ezgi Oner, Mark P. Ward, Sinead Hurley, Brian David Henderson, Faye Lewis, Stephen P. Finn, Gerard J. Fitzmaurice, John J. O'Leary, Sharon O'Toole, Lorraine O'Driscoll, Kathy Gately   +11 more
wiley   +1 more source

Cosmology of F-theory GUTs [PDF]

Journal of High Energy Physics, 2010
v3: 90 pages, 5 figures, improved figures and discussion of saxion ...
Alireza Tavanfar, Cumrun Vafa, Jonathan J. Heckman   +2 more
openaire   +4 more sources

Fluxed M5-instantons in F-theory

, 2012
We analyse the non-perturbative superpotential due to M5-brane instantons in F-theory compactifications on Calabi-Yau fourfolds. The M5 partition function is obtained via holomorphic factorisation by explicitly performing the sum over chiral 3-form ...
Akerblom, Akerblom, Andreas, Argurio, Argurio, Bandos, Baumann, Baumann, Berg, Bergshoeff, Bergshoeff, Bershadsky, Bianchi, Bianchi, Bianchi, Billo, Billo, Blumenhagen, Blumenhagen, Blumenhagen, Blumenhagen, Blumenhagen, Blumenhagen, Blumenhagen, Braun, Chen, Collinucci, Collinucci, Collinucci, Cvetič, Cvetič, Cvetič, DallʼAgata, Dijkgraaf, Dolan, Donagi, Donagi, Esole, Florea, Freed, Greene, Grimm, Grimm, Grimm, Grimm, Grimm, Grimm, Grimm, Grimm, Grimm, Grimm, Grimm, Gustavsson, Gustavsson, Haack, Haack, Haack, Henningson, Howe, Ibanez, Ibanez, Intriligator, Jockers, Kachru, Kallosh, Kallosh, Kerstan, Knapp, Koerber, Krause, Krause, Marchesano, Marsano, Marsano, Marsano, Marsano, Marsano, Martucci, Max Kerstan, Mayr, Pasti, Pasti, Saulina, Timo Weigand, Tsimpis, Witten, Witten   +86 more
core   +1 more source

The toric SO(10) F-theory landscape

Journal of High Energy Physics, 2017
Supergravity theories in more than four dimensions with grand unified gauge symmetries are an important intermediate step towards the ultraviolet completion of the Standard Model in string theory.
W. Buchmüller, M. Dierigl, P.-K. Oehlmann, F. Rühle   +3 more
doaj   +1 more source