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CERN Document Server 111 Datensätze gefunden  1 - 10nächsteEnde  gehen zum Datensatz: Die Suche hat 1.39 Sekunden gedauert. 
1.
On the degrees of freedom of R$^{2}$ gravity in flat spacetime / Hell, Anamaria (Tokyo U., IPMU) ; Lust, Dieter (Munich U. ; Munich, Max Planck Inst.) ; Zoupanos, George (Munich, Max Planck Inst. ; Natl. Tech. U., Athens ; CERN ; Heidelberg U.)
We study the degrees of freedom of $R^2$ gravity in flat spacetime with two approaches. By rewriting the theory a la Stueckelberg, and implementing Lorentz-like gauges to the metric perturbations, we confirm that the pure theory propagates one scalar degree of freedom, while the full theory contains two tensor modes in addition. [...]
arXiv:2311.08216; LMU-ASC 34/23; MPP-2023-256.- 2024-02-07 - 36 p. - Published in : JHEP 2402 (2024) 039 Fulltext: 2311.08216 - PDF; Publication - PDF;
2.
On the Ghost Problem of Conformal Gravity / Hell, Anamaria (Munich U., ASC) ; Lust, Dieter (Munich U., ASC ; Munich, Max Planck Inst.) ; Zoupanos, George (CERN ; Heidelberg U.)
We study the metric perturbations around the de Sitter and Minkowski backgrounds in Conformal Gravity. We confirm the presence of ghosts in both cases. [...]
arXiv:2306.13714; CERN-TH-2023-116; LMU-ASC 21/23; MPP-2023-134.- 2023-08-24 - 24 p. - Published in : JHEP 2308 (2023) 168 Fulltext: 2306.13714 - PDF; document - PDF;
3.
Bimetric, Conformal Supergravity and its Superstring Embedding / Ferrara, Sergio (CERN ; Frascati ; UCLA) ; Kehagias, Alex (Natl. Tech. U., Athens) ; Lüst, Dieter (CERN ; Munich U., ASC ; Munich, Max Planck Inst.)
We discuss the connection between Weyl$^2$ supergravity and superstrings and further discuss holography between 4-dimensional, ${\cal N}=4$ superconformal Weyl$^2$ supergravity and ${\cal N}=8$, higher spin-four theory on $AdS_5$. The Weyl$^2$ plus Einstein supergravity theory is a special kind of a bimetric gravity theory and consists of a massless graviton multiplet plus an additional massive spin-two supermultiplet. [...]
arXiv:1810.08147; CERN-TH-2018-222; MPP-2018-249; LMU-ASC 64/18; LMU-ASC-64-18.- 2019-05-20 - 33 p. - Published in : JHEP 05 (2019) 100 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
4.
Aspects of Weyl Supergravity / Ferrara, Sergio (CERN ; Frascati ; UCLA) ; Kehagias, Alex (Natl. Tech. U., Athens) ; Lüst, Dieter (CERN ; Munich U., ASC ; Munich, Max Planck Inst.)
In this paper we study the spectrum of all conformal, ${\cal N}$-extended supergravities (${\cal N}=1,2,3,4$) in four space-time dimensions. When these theories are obtained as massless limit of Einstein plus Weyl$^2$supergravity, the appropriate counting of the enhanced gauge symmetries allow us to derive the massless spectrum which consist of a dipole ghost graviton multiplet, a ${\cal N}$-fold tripole ghost gravitino, the third state belonging to a spin 3/2 multiplet and a residual vector multiplet present for non-maximal ${\cal N}<4$ theories. [...]
arXiv:1806.10016; CERN-TH-2018-144; MPP-2018-142; LMU-ASC 39/18; LMU-ASC-39-18.- 2018-08-31 - 22 p. - Published in : JHEP 08 (2018) 197 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
5.
Open-string T-duality and applications to non-geometric backgrounds / Cordonier-Tello, Fabrizio (Munich U.) ; Lust, Dieter (Munich U. ; Munich, Max Planck Inst. ; CERN) ; Plauschinn, Erik (Munich U.)
We revisit T-duality transformations for the open string via Buscher's procedure and work-out technical details which have been missing so far in the literature. We take into account non-trivial topologies of the world-sheet, we consider T-duality along directions with Neumann as well as Dirichlet boundary conditions, and we include collective T-duality along multiple directions. [...]
arXiv:1806.01308; CERN-TH-2018-128.- 2018-08-31 - 47 p. - Published in : JHEP 08 (2018) 198 Article from SCOAP3: PDF; Fulltext: PDF;
6.
Spin-four N=7 W-Supergravity: S-fold and Double Copy Construction / Ferrara, Sergio (CERN ; Frascati ; UCLA) ; Lüst, Dieter (CERN ; Munich U., ASC ; Munich, Max Planck Inst.)
In the present investigation we consider the possibility of having new massive, higher spin W-supergravity theories, which do not exist as four-dimensional perturbative models. These theories are based on a double copy construction of two supersymmetric field theories, where at least one factor is given by a N=3 field theory, which is a non-perturbative S-fold of N=4 super Yang-Mills theory. [...]
arXiv:1805.10022; LMU-ASC-29-18; CERN-TH-2018-112; MPP-2018-87; LMU-ASC 29/18.- 2018-07-18 - 33 p. - Published in : JHEP 07 (2018) 114 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: arXiv:1805.10022 - PDF; 1805.10022 - PDF;
7.
2d orbifolds with exotic supersymmetry / Florakis, Ioannis (Paris, LPTHE) ; García-Etxebarria, Iñaki (Munich, Max Planck Inst.) ; Lust, Dieter (Munich, Max Planck Inst. ; Munich U., ASC) ; Regalado, Diego (CERN)
We analyse various two dimensional theories arising from compactification of type II and heterotic string theory on asymmetric orbifolds. We find extra supersymmetry generators arising from twisted sectors, giving rise to exotic supersymmetry algebras. [...]
arXiv:1712.04318; CERN-TH-2017-263.- 2018-02-23 - 48 p. - Published in : JHEP 02 (2018) 146 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
8.
Stringy origin of diboson and dijet excesses at the LHC / Anchordoqui, Luis A. (Lehman Coll. ; CUNY, Graduate School - U. Ctr. ; Amer. Museum Natural Hist.) ; Antoniadis, Ignatios (Paris, LPTHE ; CERN ; U. Bern, AEC) ; Goldberg, Haim (Northeastern U.) ; Huang, Xing (Taiwan, Natl. Normal U.) ; Lust, Dieter (Munich U., ASC ; Munich, Max Planck Inst.) ; Taylor, Tomasz R. (Northeastern U.)
Very recently, the ATLAS and CMS collaborations reported diboson and dijet excesses above standard model expectations in the invariant mass region of 1.8 -2.0 TeV. Interpreting the diboson excess of events in a model independent fashion suggests that the vector boson pair production searches are best described by WZ or ZZ topologies, because states decaying into W^+W^- pairs are strongly constrained by semileptonic searches. [...]
MPP--2015--155; LMU-ASC-45-15; arXiv:1507.05299; MPP-2015-155; LMU-ASC 45-15.- 2015-08-15 - 5 p. - Published in : Phys. Lett. B 749 (2015) 484-488 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Preprint: PDF; External link: Preprint
9.
Aspects of Quadratic Gravity / Alvarez-Gaume, Luis (CERN) ; Kehagias, Alex (Natl. Tech. U., Athens ; Geneva U., CAP) ; Kounnas, Costas (Ecole Normale Superieure) ; Lust, Dieter (CERN ; Munich, Max Planck Inst. ; Munich U., ASC) ; Riotto, Antonio (Geneva U., CAP)
We discuss quadratic gravity where terms quadratic in the curvature tensor are included in the action. After reviewing the corresponding field equations, we analyze in detail the physical propagating modes in some specific backgrounds. [...]
arXiv:1505.07657; LMU-ASC 26-15; MPP-2015-95; CERN-PH-TH-2015-099.- Geneva : CERN, 2016 - 24 p. - Published in : Fortsch. Phys.: 64 (2016) , no. 2-3, pp. 176-189 Fulltext: PDF; External link: Preprint
10.
13th Hellenic School and Workshops on Elementary Particle Physics and Gravity : Workshop on Noncommutative Field Theory and Gravity - CORFU2013-NC   8 - 15 Sep 2013  - Corfu, Greece  / Anagnostopoulos, Konstantinos (ed.); Lechtenfeld, Olaf (ed.); Lüst, Dieter (ed.); Kawai, Hikaru (ed.); Nishimura, Jun (ed.); Steinacker, Harold (ed.); Szabo, Richard (ed.); Watamura, Satoshi (ed.); Zoupanos, George (ed.)
2014 - Published in : Fortschr. Phys. 62 (2014)

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