Zobrazeno 1 - 10
of 216
pro vyhledávání: '"von Gersdorff, Gero"'
Autor:
Carneiro, Igor, von Gersdorff, Gero
We present a formalism for computing arbitrary multi-loop Feynman graphs in curved spacetime using the heat kernel approach. To this end, we compute the off-diagonal components of the heat kernel in Riemann normal coordinates up to second order in th
Externí odkaz:
http://arxiv.org/abs/2408.04005
Autor:
von Gersdorff, Gero
We prove a neat factorization property of Feynman graphs in covariant perturbation theory. The contribution of the graph to the effective action is written as a product of a massless scalar momentum integral that only depends on the basic graph topol
Externí odkaz:
http://arxiv.org/abs/2309.14939
Autor:
von Gersdorff, Gero, Santos, Kevin
We provide a new and completely general formalism to compute the effective field theory matching contributions from integrating out massive fields in a manifestly gauge covariant way, at any desired loop order. The formalism is based on old ideas suc
Externí odkaz:
http://arxiv.org/abs/2212.07451
Autor:
Baldenegro, Cristian, Bellora, Andrea, Fichet, Sylvain, von Gersdorff, Gero, Pitt, Michael, Royon, Christophe
We study the LHC sensitivity to new broad neutral resonances produced in two-photon fusion and decaying to a top quark pair, $\gamma\gamma \to t\bar{t}$. This is probed in central exclusive $t\bar{t}$ production in proton-proton collisions, $pp \to p
Externí odkaz:
http://arxiv.org/abs/2205.01173
Autor:
Hentschinski, Martin, Royon, Christophe, Peredo, Marco Alcazar, Baldenegro, Cristian, Bellora, Andrea, Boussarie, Renaud, Celiberto, Francesco Giovanni, Cerci, Salim, Chachamis, Grigorios, Contreras, J. G., Fichet, Sylvain, Fucilla, Michael, von Gersdorff, Gero, González, Pablo, van Hameren, Andreas, Jalilian-Marian, Jamal, Kampshoff, Mats, Khoze, Valery, Klasen, Michael, Klein, Spencer Robert, Krintiras, Georgios, Kotko, Piotr, Kutak, Krzysztof, Lansberg, Jean-Philippe, Li, Emilie, Loizides, Constanin, Mohammed, Mohammed M. A., Nefedov, Maxim, Ozcelik, Melih A., Papa, Alessandro, Pitt, Michael, Vera, Agustin Sabio, Salomon, Jens, Sapeta, Sebastian, da Silveira, Gustavo Gil, Gonçalves, Victor Paulo, Strikman, Mark, Cerci, Deniz Sunar, Szymanowski, Lech, Takaki, Daniel Tapia, Taševský, Marek, Wallon, Samuel
The goal of this whitepaper is to give a comprehensive overview of the rich field of forward physics. We discuss the occurrences of BFKL resummation effects in special final states, such as Mueller-Navelet jets, jet gap jets, and heavy quarkonium pro
Externí odkaz:
http://arxiv.org/abs/2203.08129
Autor:
Chen, Wei, von Gersdorff, Gero
The quantum geometric properties of a Bloch state in momentum space are usually described by the Berry curvature and quantum metric. In realistic gapped materials where interactions and disorder render the Bloch state not a viable starting point, we
Externí odkaz:
http://arxiv.org/abs/2202.03494
Autor:
von Gersdorff, Gero, Chen, Wei
Publikováno v:
Phys. Rev. B 104, 195133 (2021)
A unified expression for topological invariants has been proposed recently to describe the topological order in Dirac models belonging to any dimension and symmetry class. We uncover a correspondence between the curvature function that integrates to
Externí odkaz:
http://arxiv.org/abs/2106.14769
Publikováno v:
Phys. Rev. B 103, 245146 (2021)
Topological phases of materials are characterized by topological invariants that are conventionally calculated by different means according to the dimension and symmetry class of the system. For topological materials described by Dirac models, we int
Externí odkaz:
http://arxiv.org/abs/2103.15981
Autor:
von Gersdorff, Gero
Maybe the biggest puzzle in grand unified theories (GUTs) is the apparent large splitting of the doublet and triplet Higgs masses. We suggest a novel mechanism to solve this puzzle, which relies on the clockwork mechanism to generate large hierarchie
Externí odkaz:
http://arxiv.org/abs/2009.08480
Autor:
von Gersdorff, Gero
We present realistic models of flavor in SU(5) and SO(10) grand unified theories (GUTs). The models are renormalizable and do not require any exotic representations in order to accommodate the necessary GUT breaking effects in the Yukawa couplings. T
Externí odkaz:
http://arxiv.org/abs/2005.14207