159 citations · 1.6k across the 38 of their papers we have counts for
39 papers
Generating Multipartite Entanglement via Structured-Bath Engineering
Baptiste Debecker, Philipp Westhoff, Visal So +5
We present how to dissipatively prepare genuinely multipartite-entangled steady states with mutually independent local reservoirs by harnessing an Abelian strong symmetry and tempo…
Revisiting the Page curve and its moments. A combinatorial approach
Gero von Gersdorff
We revisit the calculation of the von Neumann (or "entanglement") entropy of a subsystem of a pure quantum state, under the assumption that the latter is drawn at random from a uni…
The Heat Kernel in Riemann Normal Coordinates and Multiloop Feynman Graphs in Curved Spacetime
Igor Carneiro, Gero von Gersdorff
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…
Factorization of covariant Feynman graphs for the effective action
Gero von Gersdorff
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 massle…
New Covariant Feynman Rules for Effective Field Theories
Gero von Gersdorff, Kevin Santos
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 w…
Searching for anomalous top quark interactions with proton tagging and timing detectors at the LHC
Cristian Baldenegro, Andrea Bellora, Sylvain Fichet +3
We study the LHC sensitivity to new broad neutral resonances produced in two-photon fusion and decaying to a top quark pair, . This is probed in central exclusive $…
Measurement of Topological Order based on Metric-Curvature Correspondence
Gero von Gersdorff, Wei Chen
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 uncov…
Natural Fermion Hierarchies from Random Yukawa Couplings
Gero von Gersdorff
The Standard Model of particle physics requires Yukawa matrices with eigenval- ues that differ by orders of magnitude. We propose a novel way to explain this fact without any small…
Probing the anomalous coupling at the LHC with proton tagging
Cristian Baldenegro, Sylvain Fichet, Gero von Gersdorff +1
The sensitivities to the anomalous quartic gauge boson coupling are estimated via production with intact protons in the forward region at the LHC. Proton tagging proves…
LHC Forward Physics
K. Akiba, M. Akbiyik, M. Albrow +184
The goal of this report is to give a comprehensive overview of the rich field of forward physics, with a special attention to the topics that can be studied at the LHC. The report…
The Global Higgs as a Signal for Compositeness at the LHC
Sylvain Fichet, Gero von Gersdorff, Eduardo Ponton +1
The radial excitation of the global symmetry-breaking vacuum in composite Higgs models, called the "global Higgs", has been recently a focus of investigation. In this paper we stud…
The Excitation of the Global Symmetry-Breaking Vacuum in Composite Higgs Models
Sylvain Fichet, Gero von Gersdorff, Eduardo Ponton +1
We consider scenarios of Higgs compositeness where the Higgs doublet arises as a pseudo-Nambu Goldstone boson. Our focus is the physical scalar ("radial") excitation associated wit…
Measuring the diphoton coupling of a 750 GeV resonance
Sylvain Fichet, Gero von Gersdorff, Christophe Royon
A slight excess has been observed in the first data of photon-photon events at the 13 TeV LHC, that might be interpreted has a hint of physics beyond the Standard Model. We show th…
Scattering Light by Light at 750 GeV at the LHC
Sylvain Fichet, Gero von Gersdorff, Christophe Royon
We consider the possibility that the diphoton excess at 750 GeV is caused by a new scalar resonance produced in photon fusion. This scenario is parametrised by only one relevant ef…
Effective theory for neutral resonances and a statistical dissection of the ATLAS diboson excess
Sylvain Fichet, Gero von Gersdorff
We classify the complete set of dimension-5 operators relevant for the resonant production of a singlet of spin 0 or 2 linearly coupled to the Standard Model (SM). We compute the d…
Light-by-light scattering with intact protons at the LHC: from Standard Model to New Physics
Sylvain Fichet, Gero von Gersdorff, Bruno Lenzi +2
We discuss the discovery potential of light-by-light scattering at the Large Hadron Collider (LHC), induced by the Standard Model (SM) and by new exotic charged particles. Our simu…
Probing new physics in diphoton production with proton tagging at the Large Hadron Collider
S. Fichet, G. von Gersdorff, O. Kepka +3
The sensitivities to anomalous quartic photon couplings at the Large Hadron Collider are estimated using diphoton production via photon fusion. The tagging of the protons proves to…
Flavor Physics in Warped Space
Gero von Gersdorff
We review constraints from quark and lepton flavor violation on extra dimensional models with warped geometry, both in the minimal and the custodial model. For both scenarios, KK m…
Anomalous gauge couplings from composite Higgs and warped extra dimensions
Sylvain Fichet, Gero von Gersdorff
We examine trilinear and quartic anomalous gauge couplings (AGCs) generated in composite Higgs models and models with warped extra dimensions. We first revisit the SU(2)_L x U(1)_Y…
Linking Natural Supersymmetry to Flavour Physics
Emilian Dudas, Gero von Gersdorff, Stefan Pokorski +1
With the aim of linking natural supersymmetry to flavour physics, a model is proposed based on a family symmetry G \times U(1), where G is a discrete nonabelian subgroup of SU(2),…
A Bayesian view of the Higgs sector with higher dimensional operators
Beranger Dumont, Sylvain Fichet, Gero von Gersdorff
We investigate the possibilities of New Physics affecting the Standard Model (SM) Higgs sector. An effective Lagrangian with dimension-six operators is used to capture the effect o…
Universal contributions to scalar masses from five dimensional supergravity
Emilian Dudas, Gero von Gersdorff
We compute the effective Kahler potential for matter fields in warped compactifications, starting from five dimensional gauged supergravity, as a function of the matter fields loca…
Neutrino Mixing from Wilson Lines in Warped Space
Gero von Gersdorff, Mariano Quiros, Michael Wiechers
We consider the generation of the hierarchical charged lepton spectrum and anarchic neutrino masses and mixing angles in warped extra dimensional models with Randall-Sundrum metric…
Flavor Phenomenology in General 5D Warped Spaces
Joan A. Cabrer, Gero von Gersdorff, Mariano Quiros
We have considered a general 5D warped model with SM fields propagating in the bulk and computed explicit expressions for oblique and non-oblique electroweak observables as well as…