Zobrazeno 1 - 10
of 615
pro vyhledávání: '"Kallosh, Renata"'
Autor:
Kallosh, Renata
D-dimensional maximal supergravities type I with G/H coset spaces have global G-symmetry and local H symmetry, which can be gauge-fixed in symmetric or Iwasawa-type gauges. Maximal D-dimensional supergravities type II derived from higher dimensions w
Externí odkaz:
http://arxiv.org/abs/2410.19216
We discuss known maximal D-dimensional supergravities of two types: type I with G/H coset spaces and type II derived by compactification from higher dimensions without dualization, these have less manifest symmetries. In 4D and 6D in type I models we
Externí odkaz:
http://arxiv.org/abs/2409.18950
Autor:
Kallosh, Renata, Linde, Andrei
We study cosmological theory where the kinetic term and potential have $SL(2,\mathbb{Z})$ symmetry. Potentials have a plateau at large values of the inflaton field, where the axion forms a flat direction. Due to the underlying hyperbolic geometry and
Externí odkaz:
http://arxiv.org/abs/2408.05203
Autor:
Kallosh, Renata
U-duality imposes strong constraints on the structure of divergences in supergravity. But Gaillard-Zumino Sp$(2n_v, \mathbb{R})$ duality in D=4 has more symmetries than U-duality. For example, in $N = 8$ the dimension of Sp(56) is 1596, whereas its U
Externí odkaz:
http://arxiv.org/abs/2405.20275
Autor:
Kallosh, Renata
We introduce Ward identities for superamplitudes in D-dimensional N-extended supergravities. These identities help to clarify the relation between linearized superinvariants and superamplitudes. The solutions of these Ward identities for an $n$-parti
Externí odkaz:
http://arxiv.org/abs/2402.03453
Autor:
Kallosh, Renata
Investigation of on-shell superinvariants is the standard way to identify the candidate UV divergences in supergravity. Geometric on-shell superinvariants in 4d supergravity at $N\geq 4$ are available starting at the critical loop order. However, mor
Externí odkaz:
http://arxiv.org/abs/2312.06794
Autor:
Kallosh, Renata
We find that in 6d maximal supergravity there are 3-loop order amplitudes with non-vanishing soft-scalar limits and anomalous $E_{5(5)}$ duality, induced by a 3-loop UV divergence. If the relevant non-vanishing soft-scalar limits would be detected in
Externí odkaz:
http://arxiv.org/abs/2311.10084
Autor:
Kallosh, Renata
We study candidate counterterms (CT)'s in maximal supergravities in diverse integer dimensions $d \geq 4 $. We find that UV divergences in these theories occur at the number of loops $L$ below certain critical value $L_{cr}$. At $L\geq L_{cr}$ the CT
Externí odkaz:
http://arxiv.org/abs/2304.13926
Autor:
Kallosh, Renata
We study supergravities with "enhanced UV divergence cancellations". We show that all these cancellations are explained by a simple dimensional analysis of nonlinear local supersymmetry (NLS). We also show that in all cases where E7-type duality was
Externí odkaz:
http://arxiv.org/abs/2304.13211
Autor:
Kallosh, Renata, Yamada, Yusuke
We study d=4, $N\geq 5$ supergravities and their deformation via candidate counterterms, with the purpose to absorb UV divergences. We generalize the earlier studies of deformation and twisted self-duality constraint to the case with unbroken local H
Externí odkaz:
http://arxiv.org/abs/2304.10514