Hasil untuk "hep-th"

Bibek Saha, Martin Ventoso, Steven F. Moss

Nitin K. Ahuja

Ativitch Asavachaisuvikom, Pun Pugkhem, Vor Luvira

Kimitoshi Kubo, Xinhan Zhang, Ikko Tanaka

Hideaki Kazumori, Asumi Saima

Kimitoshi Kubo, Issei Ashida, Noriko Kimura

Yasutoshi Shiratori, Ryosuke Yokosuka, Katsuyuki Fukuda

Diana L. Snyder, David A. Katzka

Hsueh-Chien Chiang, Xi-Zhang Lin

Shishirendu Parihar, Vaibhav Karoliya, Ishan Mittal et al.

Lorenzo Casarin, A. Tseytlin

A classically scale-invariant 6d analog of the 4d Yang-Mills theory is the 4-derivative (∇F )2 + F 3 gauge theory with two independent couplings. Motivated by a search for a perturbatively conformal but possibly non-unitary 6d models we compute the one-loop β-functions in this theory. A systematic way of doing this using the back-ground field method requires the (previously unknown) expression for the b6 Seeley-DeWitt coefficient for a generic 4-derivative operator; we derive it here. As an application, we also compute the one-loop β-function in the (1,0) supersymmetric (∇F )2 6d gauge theory con-structed in hep-th/0505082.

L. Smolin

A proposal is made for a fundamental theory, in which the history of the universe is constituted of diverse views of itself. Views are attributes of events, and the theory’s only be-ables; they comprise information about energy and momentum transferred to an event from its causal past. A dynamics is proposed for a universe constituted of views of events, which combines the energetic causal set dynamics with a potential energy based on a measure of the distinctiveness of the views, called the variety (Smolin in Found Phys 46(6):736–758, 2016). As in the real ensemble formulation of quantum mechanics (Barbour and Smolin in Variety, complexity and cosmology, arXiv: hep-th/9203041), quantum pure states are associated to ensembles of similar events; the quantum potential of Bohm then arises from the variety.

E. Buchbinder, S. Kuzenko, I. Samsonov

A bstractFor N$$ \mathcal{N} $$-extended superconformal field theories in three spacetime dimensions (3D), with 1 ≤ N$$ \mathcal{N} $$ ≤ 3, we compute the two- and three-point correlation functions of the supercurrent and the flavour current multiplets. We demonstrate that supersymmetry imposes additional restrictions on the correlators of conserved currents as compared with the non-supersymmetric case studied by Osborn and Petkou in hep-th/9307010. It is shown that the three-point function of the supercurrent is determined by a single functional form consistent with the conservation equation and all the symmetry properties. Similarly, the three-point function of the flavour current multiplets is also determined by a single functional form in the N=1$$ \mathcal{N}=1 $$ and N=3$$ \mathcal{N}=3 $$ cases. The specific feature of the N=2$$ \mathcal{N}=2 $$ case is that two independent structures are allowed for the three-point function of flavour current multiplets, but only one of them contributes to the three-point function of the conserved currents contained in these multiplets. Since the supergravity and super-Yang-Mills Ward identities are expected to relate the coefficients of the two- and three-point functions under consideration, the results obtained for 3D superconformal field theory are analogous to those in 2D conformal field theory.In addition, we present a new supertwistor construction for compactified Minkowski superspace. It is suitable for developing superconformal field theory on 3D spacetimes other than Minkowski space, such as S1× S2 and its universal covering space ℝ×S2$$ \mathrm{\mathbb{R}}\times {S}^2 $$.

J. B. Geloun

A recent rank-4 tensor field model generating 4D simplicial manifolds has been proved to be renormalizable at all orders of perturbation theory (Ben Geloun and Rivasseau 2011 arXiv:1111.4997 [hep-th]). The model is built out of ϕ6 (ϕ6(1/2)), ϕ4 (ϕ4(1)) interactions and an anomalous term (ϕ4(2)). The β-functions of this model are evaluated at two and four loops. We find that the model is asymptotically free in the UV for both the main ϕ6(1/2) interactions, whereas it is safe in the ϕ4(1) sector. The remaining anomalous term turns out to possess a Landau ghost.

Jyothish Soman, A. Narang