Fri·Feb 15, 2019Friday·February 15, 2019

1. 01*

   Diffractive Dijet Production and Wigner Distributions from the Color Glass Condensate

   Heikki Mäntysaari🇫🇮 · Niklas Mueller🇺🇸 · Björn Schenke🇺🇸

   Experimental processes that are sensitive to parton Wigner distributions provide a powerful tool to advance our understanding of proton structure. In this work, we compute gluon Wigner and Husimi distributions of protons within the Color Glass Condensate framework, which includes a spatially dependent McLerran-Venugopalan initial configuration and the explicit numerical solution of the JIMWLK equations. We determine the leading anisotropy of the Wigner and Husimi distributions as a function of the angle between impact parameter and transverse momentum. We study experimental signatures of these angular correlations at a proposed Electron Ion Collider by computing coherent diffractive dijet production cross sections in e+p collisions within the same framework. Specifically, we predict the elliptic modulation of the cross section as a function of the relative angle between nucleon recoil and dijet transverse momentum for a wide kinematical range. We further predict its dependence on collision energy, which is dominated by the growth of the proton with decreasing $x$.

   hep-phnucl-thPRD(2019)·90 citations
2. 02*

   SUSY Signals from QCD Production at the Upgraded LHC

   Tao Han🇺🇸 · Ahmed Ismail🇺🇸 · Barmak Shams Es Haghi🇺🇸

   Weak-scale supersymmetry remains to be one of the best-motivated theories of physics beyond the Standard Model. We evaluate the sensitivities of the High Luminosity (HL) and High Energy (HE) upgrades of the LHC to gluinos and stops, decaying through the simplified topologies $\tilde{g}\to q\bar{q}{\chi }^0$, $\tilde{g}\to t\bar{t}{\chi }^0$ and $\tilde{t}\to t{\tilde{\chi }}^0$. Our HL-LHC analyses improve on existing experimental projections by optimizing the acceptance of kinematic variables. The HE-LHC studies represent the first 27 TeV analyses. We find that the HL-(HE-)LHC with 3 ab${}^{-1}$ (15 ab${}^{-1}$) of integrated luminosity will be sensitive to the masses of gluinos and stops at 3.2 (5.7) TeV and 1.5 (2.7) TeV, respectively, decaying to massless neutralinos.

   hep-phhep-exPLB(2019)·5 citations
3. 03*

   Constraints on nuclear parton distributions from dijet photoproduction at the LHC

   V. Guzey (Jyvaskyla U., Helsinki U., St. Petersburg, INP)🇷🇺 · M. Klasen (Munster U., ITP)🇩🇪

   Using QCD calculations of the cross section of inclusive dijet photoproduction in Pb-Pb ultraperipheral collisions in the LHC kinematics as pseudo-data, we study the effect of including these data using the Bayesian reweighting technique on nCTEQ15, nCTEQ15np, and EPPS16 nuclear parton distribution functions (nPDFs). We find that, depending on the assumed error of the pseudo-data, it leads to a significant reduction of the nPDF uncertainties at small values of the momentum fraction $x_A$. Taking the error to be 5\%, the uncertainty of nCTEQ15 and nCTEQ15np nPDFs reduces approximately by a factor of two at $x_A=10^{-3}$. At the same time, the reweighting effect on EPPS16 nPDFs is much smaller due to the higher value of the tolerance and a more flexible parametrization form.

   hep-phnucl-exnucl-thEPJC(2019)·29 citations
4. 04*

   Electroweak Precision Tests of the Standard Model after the Discovery of the Higgs Boson

   Jens Erler🇩🇪 · Matthias Schott🇩🇪

   The global fit of the Standard Model predictions to electroweak precision data, which has been routinely performed in the past decades by several groups, led to the prediction of the top quark and the Higgs boson masses before their respective discoveries. With the measurement of the Higgs boson mass at the Large Hadron Collider (LHC) in 2012 by the ATLAS and CMS collaborations, the last free parameter of the Standard Model of particle physics has been fixed, and the global electroweak fit can be used to test the full internal consistency of the electroweak sector of the Standard Model and constrain models beyond. In this article, we review the current state-of-the-art theoretical calculations, as well as the precision measurements performed at the LHC, and interpret them within the context of the global electroweak fit. Special focus is drawn in the impact of the Higgs boson mass on the fit.

   hep-phhep-exPPNP(2019)·126 citations
5. 05*

   On Scalaron Decay via the Trace of Energy-Momentum Tensor

   Ayuki Kamada🇰🇷

   In some inflation scenarios such as $R^2$ inflation, a gravitational scalar degrees of freedom called scalaron is identified as inflaton. Scalaron linearly couples to matter via the trace of energy-momentum tensor. We study scenarios with a sequestered matter sector, where the trace of energy-momentum tensor predominantly determines the scalaron coupling to matter. In a sequestered setup, heavy degrees of freedom are expected to decouple from low-energy dynamics. On the other hand, it is non-trivial to see the decoupling since scalaron couples to a mass term of heavy degrees of freedom. Actually, when heavy degrees of freedom carry some gauge charge, the amplitude of scalaron decay to two gauge bosons does not vanish in the heavy mass limit. Here the quantum contribution to the trace of energy-momentum tensor plays an essential role. This quantum contribution is known as trace anomaly or Weyl anomaly. The trace anomaly contribution from heavy degrees of freedom cancels with the contribution from the $classical$ scalaron coupling to a mass term of heavy degrees of freedom. We see how trace anomaly appears both in the Fujikawa method and in dimensional renormalization. In dimensional renormalization, one can evaluate the scalaron decay amplitude in principle at all orders, while it is unclear how to process it beyond the one-loop level in the Fujikawa method. We consider scalaron decay to two gauge bosons via the trace of energy-momentum tensor in quantum electrodynamics with scalars and fermions. We evaluate the decay amplitude at the leading order to demonstrate the decoupling of heavy degrees of freedom.

   hep-phgr-qcJHEP(2019)·9 citations
6. 06*

   First order dissipative hydrodynamics and viscous corrections to the entropy four-current from an effective covariant kinetic theory

   Samapan Bhadury🇮🇳 · Manu Kurian🇮🇳 · Vinod Chandra🇮🇳 · Amaresh Jaiswal🇮🇳

   The first order hydrodynamic evolution equations for the shear stress tensor, the bulk viscous pressure and the charge current have been studied for a system of quarks and gluons, with a non-vanishing quark chemical potential and finite quark mass. The first order transport coefficients have been obtained by solving an effective Boltzmann equation for the grand-canonical ensemble of quasiquarks and quasigluons. We adopted temperature dependent effective fugacity for the quasiparticles to encode the hot QCD medium effects. The non-trivial energy dispersion of the quasiparticles induces mean field contributions to the transport coefficients whose origin could be directly related to the realization of conservation laws from the effective kinetic theory. Both the QCD equation of state and chemical potential are seen to have a significant impact on the quark-gluon plasma evolution. The shear and bulk viscous corrections to the entropy-four current have been investigated in the framework of the effective kinetic theory. The effect of viscous corrections to the entropy density have been quantified in the case of one dimensional boost-invariant expansion of the system. Further, the first order viscous corrections to the time evolution of temperature along with the description of pressure anisotropy and Reynolds number of the system have been explored for the longitudinal boost-invariant expansion.volution of temperature along with the description of pressure anisotropy of the system have also been explored.

   hep-phhep-thnucl-thJ.Phys.G(2020)·24 citations
7. 07*

   Baryon-number violation by two units and the deuteron lifetime

   F. Oosterhof🇳🇱 · B. Long🇨🇳 · J. de Vries🇺🇸 · R. G. E. Timmermans🇳🇱 · U. van Kolck🇫🇷

   We calculate the lifetime of the deuteron with dimension-nine quark operators that violate baryon number by two units. We construct an effective field theory for $|\Delta B|=2$ interactions that give rise to neutron-antineutron ($n$-$\bar{n}$) oscillations and dinucleon decay within a consistent power counting. We calculate the ratio of the deuteron lifetime to the square of the $n$-$\bar{n}$ oscillation time up to next-to-leading order. Our result, which is analytical and has a quantified uncertainty, is smaller by a factor $\simeq 2.5$ than earlier estimates based on nuclear models, which impacts the indirect bound on he $n$-$\bar{n}$ oscillation time and future experiments. We discuss how combined measurements of $n$-$\bar{n}$ oscillations and deuteron decay can help to identify the sources of baryon-number violation.

   hep-phnucl-thPRL(2019)·42 citations
8. 08*

   Renormalization Effects on Electric Dipole Moments in Electroweakly Interacting Massive Particle Models

   Wataru Kuramoto🇯🇵 · Takumi Kuwahara🇰🇷 · Ryo Nagai🇯🇵

   We study the renormalization effects on electric dipole moments in the models with new electroweakly interacting massive fermions. The electric dipole moments are generated by the effective operators which arise from integrating out heavy particles at some scale in the models. We give the renormalization group equation for the Wilson coefficients of the effective operators from the scale where the operators are generated to the electroweak scale. Our numerical studies focus on the electric dipole moments in the mini-split supersymmetric scenario and the electroweakly interacting massive particle dark matter scenario. It turns out that the renormalization effects can give an enhancement factor being of the order of O(10)% in the mini-split scenario and being more than two in the minimal dark matter model.

   hep-phPRD(2019)·5 citations
9. 09*

   Exact relativistic Green's functions for the time-independent potentials

   Yu.A.Simonov🇷🇺

   Relativistic formalism of Green's functions is dicussed in QCD and QED,where the relativistic Green's functions are constructed using the Schwinger proper time formalism and the Fock-Feynman-Schwinger method.As a result a simple and exact method is found for the relativistic systems,where the interaction can be written in a time-independent form.In this case one can write the relativistic Green's function as a one-dimensional integral of the corresponding nonrelativistic Green's function.The explicit example for the problem of a charge in the constant magnetic field is discussed in detail,and the exact agreement with the Schwinger relativistic form is demonstrated. A similar analysis is performed in the relativistiv Coulomb probem,supporting the accuracy of the proposed relativistic formalism.

   hep-phhep-thPRD(2019)·10 citations
10. 10*

    Fourier coefficients of the net baryon number density and their scaling properties near a phase transition

    Gabor Andras Almasi (Wigner RCP Budapest)🇭🇺 · Bengt Friman (GSI Darmstadt)🇩🇪 · Kenji Morita (RIKEN Nishina Center & Wroclaw U.)🇯🇵 · Krzysztof Redlich (Wroclaw U. & EMMI/GSI Darmstadt)🇵🇱

    We study the Fourier coefficients b(k,T) of the net baryon number density in strongly interacting matter at finite temperature. We show that singularities in the complex chemical potential plane connected with phase transitions are reflected in the asymptotic behavior of the coefficients at large k. We derive the scaling properties of b(k,T) near a second order phase transition in the O(4) and Z(2) universality classes. The impact of first order and crossover transitions is also examined. The scaling properties of b(k,T) are linked to the QCD phase diagram in the temperature and complex chemical potential plane.

    hep-phPLB(2019)·12 citations
11. 11*

    Two-loop amplitudes for Higgs plus jet production involving a modified trilinear Higgs coupling

    Martin Gorbahn🇬🇧 · Ulrich Haisch🇩🇪

    We calculate the contributions to the two-loop scattering amplitudes $h\to gg$, $h\to ggg$ and $h\to q\bar{q}g$ that arise from a modified trilinear Higgs coupling $\lambda$. Analytic expressions are obtained by performing an asymptotic expansion near the limit of infinitely heavy top quark. The calculated amplitudes are necessary to study the impact of the $\mathcal{O}(\lambda )$ corrections to the transverse momentum distributions ($p_{T,h}$) in single-Higgs production at hadron colliders for low and moderate values of $p_{T,h}$.

    hep-phJHEP(2019)·29 citations
12. 12*

    Disorder and Mimesis at Hadron Colliders

    Raffaele Tito D'Agnolo🇺🇸 · Matthew Low🇺🇸

    We discuss how systems with a large number of degrees of freedom and disorder in their mass matrix can play a role in particle physics. We derive results on their mass spectra using, where applicable, QFT techniques. We study concrete realizations of these scenarios in the context of the LHC and HL-LHC, showing that collider events with a large number of soft b-quark jets can be common. Such final states can hide these models from current searches at the LHC. This motivates the ongoing effort aimed at lowering trigger thresholds and expanding data scouting.

    hep-phJHEP(2019)·10 citations
13. 13*

    Detecting hidden sector dark matter at HL-LHC and HE-LHC via long-lived stau decays

    Amin Aboubrahim🇺🇸 · Pran Nath🇺🇸

    We investigate a class of models where the supergravity model with the standard model gauge group is extended by a hidden sector $U(1{)}_X$ gauge group and where the lightest supersymmetric particle is the neutralino in the hidden sector. We investigate this possibility in a class of models where the stau is the lightest supersymmetric particle in the MSSM sector and the next-to-lightest supersymmetric particle of the $U(1{)}_X$-extended SUGRA model. In this case the stau will decay into the neutralino of the hidden sector. For the case when the mass gap between the stau and the hidden sector neutralino is small and the mixing between the $U(1{)}_Y$ and $U(1{)}_X$ is also small, the stau can decay into the hidden sector neutralino and a tau which may be reconstructed as a displaced track coming from a high $p_T$ track of the charged stau. Simulations for this possibility are carried out for HL-LHC and HE-LHC. The discovery of such a displaced track from a stau will indicate the presence of hidden sector dark matter.

    hep-phhep-exPRD(2019)·18 citations
14. 14*

    Searching for heavy neutrinos with WWH production

    J. Baglio🇩🇪 · C. Weiland🇺🇸

    Extensions of the Standard Model are required to give mass to the light neutrinos and explain neutrino oscillations. One of the simplest ideas is to introduce new heavy, gauge singlet fermions that play the role of right-handed neutrinos in a seesaw mechanism. They could have large Yukawa couplings to the Higgs boson, affecting the production of the Higgs bosons in association with a pair of W bosons at future lepton colliders. Working in the inverse seesaw model and taking into account all possible experimental constraints, we find that sizable deviations, as large as 66\% are possible. This makes the $W_{}^{+}{W}_{}^{-}H$ production cross-section a new, promising observable to constrain neutrino mass models. The effects are generic and expected to be present in other low-scale seesaw models.

    hep-ph1 citation
15. 15*

    The Higgs Trilinear Coupling and the Scale of New Physics

    Spencer Chang🇺🇸 · Markus A. Luty🇺🇸

    We consider modifications of the Higgs potential due to new physics at high energy scales. These upset delicate cancellations predicted by the Standard Model for processes involving Higgs bosons and longitudinal gauge bosons, and lead to a breakdown of the theory at high energies. We focus on modifications of the Higgs trilinear coupling and use the violation of tree-level unitarity as an estimate of the scale where the theory breaks down. We obtain a completely model-independent bound of ~ 13 TeV for an order-1 modification of the trilinear. We argue that this bound can be saturated only in fine-tuned models, and the scale of new physics is likely to be much lower. The most stringent bounds are obtained from amplitudes involving multiparticle states that are not conventional scattering states. Our results show that a future determination of the Higgs cubic coupling can point to a well-defined scale of new physics that can be targeted and explored at future colliders.

    hep-phhep-thJHEP(2020)·85 citations
16. 16*

    Supersymmetric Inflation from the Fifth Dimension

    Kaustubh Deshpande🇺🇸 · Raman Sundrum🇺🇸

    We develop a supersymmetric bi-axion model of high-scale inflation coupled to supergravity, in which the axionic structure originates from, and is protected by, gauge symmetry in an extra dimension. While local supersymmetry (SUSY) is necessarily Higgsed at high scales during inflation we show that it can naturally survive down to the $\sim$ TeV scale in the current era in order to resolve the electroweak hierarchy problem. We show how a suitable inflationary effective potential for the axions can be generated at tree-level by charged fields under the higher-dimensional gauge symmetry. The inflationary trajectory lies along the lightest direction in the bi-axion field space, with periodic effective potential and an effective super-Planckian field range emerging from fundamentally sub-Planckian dynamics. The heavier direction in the field space is shown to also play an important role, as the dominant source of super-Higgsing during inflation. This model presents an interesting interplay of tuning considerations relating the electroweak hierarchy, cosmological constant and inflationary superpotential, where maximal naturalness favors SUSY breaking near the electroweak scale after inflation. The scalar superpartner of the axionic inflaton, the "sinflaton", can naturally have $\sim$ Hubble mass during inflation and sufficiently strong coupling to the inflaton to mediate primordial non-Gaussianities of observable strength in future 21-cm surveys. Non-minimal charged fields under the higher-dimensional gauge symmetry can contribute to periodic modulations in the CMB, within the sensitivity of ongoing measurements.

    hep-phgr-qchep-thJHEP(2019)·5 citations
17. 17*

    Higgs domain walls in the thermal background

    Tomasz Krajewski🇵🇱 · Zygmunt Lalak🇵🇱 · Marek Lewicki🇬🇧 · Paweł Olszewski🇵🇱

    Most cosmological models predict that the universe was hot and dense at the early stages of it's evolution. In this paper we analyse the influence of the thermal bath of Standard Model particles on the dynamics of cosmological Higgs domain walls. This manuscript poses an~extension of our earlier work in which we investigated the evolution of networks of Higgs domain walls neglecting the impact of temperature variation. Using the thermally corrected effective potential of Standard Model we have found that both the position of the local maximum $h_{max}$ separating minima and the width of domain walls strongly depend on temperature $T$. For temperatures higher than $10^{10}\text{GeV}$ they respectively increase proportionally and decrease inverse proportionally to the increasing temperature. Thus, the energy scale of the problem follows the value of temperature. Our numerical lattice simulations based on the PRS algorithm reveal that Higgs domain walls in the presence of the background thermal bath are highly unstable and decay shortly after formation. Moreover we have found that the fraction of horizons produced by inflation in which Higgs field expectation value is higher then $h_{max}$ needs to be very low in order for the evolution of the~network of the domain walls to end in the electroweak vacuum. This means that Higgs domain walls necessarily were very rare objects and their average energy density was very small. As a result, the domain walls can not significantly effect cosmological observables.

    hep-phastro-ph.COgr-qchep-thPhys.Dark Univ.(2019)·4 citations
18. 18*

    Equation of state at finite densities for QCD matter in nuclear collisions

    Akihiko Monnai🇯🇵 · Björn Schenke🇺🇸 · Chun Shen🇺🇸

    We construct the QCD equation of state at finite chemical potentials including net baryon, electric charge, and strangeness, based on the conserved charge susceptibilities determined from lattice QCD simulations and the equation of state of the hadron resonance gas model. For the application to relativistic heavy ion collisions we consider the situation of strangeness neutrality and matter with a fixed electric charge-to-baryon ratio, resembling that of heavy nuclei. The importance of finite electric charge and strangeness chemical potentials for particle production in heavy ion collisions is demonstrated using hydrodynamic simulations.

    ↳ nucl-thhep-phnucl-exPRC(2019)·180 citations
19. 19*

    Study of fermion pair events at the 250 GeV ILC

    Yuto Deguchi🇯🇵 · Hiroaki Yamashiro🇯🇵 · Taikan Suehara🇯🇵 · Tamaki Yoshioka🇯🇵 · Keisuke Fujii🇯🇵 · Kiyotomo Kawagoe🇯🇵

    Precise measurements of electroweak processes at the International Linear Collider (ILC) will provide unique opportunities to explore new physics beyond the Standard Model. Fermion pair production events are sensitive to new interactions involving a new heavy gauge boson or an electroweak interacting massive particle (EWIMP).We studied the mass reach of new particles at the ILC with $\sqrt{s}=250$ GeV by using $e^{+}{e}^{-}\to e^{+}{e}^{-}$and $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$ events. We show that a mass reach for BSM particles can be determined with 90% confidence level using a toy Monte Carlo technique.

    ↳ hep-exhep-ph5 citations
20. 20*

    Coherent dibaryons

    Boris Kostenko🇷🇺

    There are encouraging evidences for registration of excitations of quark oscillator levels in compressed 2-nucleon systems, which were hidden in two independently published experimental works for many years. Data obtained by EVA collaboration can be considered as the third possible confirmation of this conjecture. Moreover, they drop hints about existence of coherent dibaryons which may be interpreted as usual or generalized coherent states of the oscillator. These data may also be an explicit example of a physical process described by Landau and Peierls in their reasoning concerning the energy-time uncertainty relation. Two models of the coherent dibaryon creation are formulated. Phase transitions of baryon matter in few-nucleon systems are discussed.

    ↳ nucl-thhep-ph1 citation
21. 21*

    Photoproduction $\gamma p\to K^{\ast +}\Lambda$ in a Reggeized model

    Ai-Chao Wang🇨🇳 · Fei Huang🇨🇳 · Wen-Ling Wang🇨🇳 · Guang-Xiong Peng🇨🇳

    The high-precision differential cross-section data for the reaction $\gamma p\to K^{\ast +}\Lambda$ are reanalyzed within a Regge-inspired effective Lagrangian approach. The model adopts Regge phenomenology to constrain the $t$-channel contributions from the $\kappa$, $K$, and $K^{\ast }$ exchanges. A minimal number of resonances in the $s$ channel are introduced in constructing the reaction amplitudes in order to describe the data. It is shown that the differential cross-section data for $\gamma p\to K^{\ast +}\Lambda$ can be satisfactorily described by introducing the only $N(2060){5/2}^{-}$ resonance in the $s$ channel, which is quite different from our earlier work performed in an effective Lagrangian approach [A. C. Wang {\it et al.}, Phys. Rev. C 96, 035206 (2017)], where the amplitudes are computed by evaluating Feynman diagrams and it is found that introducing at least one additional resonance apart from the $N(2060){5/2}^{-}$ is indispensable for reproducing the data. The roles of individual contributions from meson and baryon exchanges on the angular distributions are found to be highly model dependent. The extracted mass of $N(2060){5/2}^{-}$ turns out to be well determined, independent of how the $t$-channel amplitudes are constructed, whereas the width does not.

    ↳ nucl-thhep-phPRC(2020)·11 citations
22. 22*

    Dark sector unifications: dark matter-phantom energy, dark matter -- constant $w$ dark energy, dark matter-dark energy-dark matter

    Dalibor Perkovic🇭🇷 · Hrvoje Stefancic🇭🇷

    The paper brings a novel approach to unification of dark matter and dark energy in terms of a cosmic fluid. A model is introduced in which the cosmic fluid speed of sound squared is defined as a function of its equation of state (EoS) parameter. It is shown how logarithmic part of this function results in dynamical regimes previously not observed in cosmic fluid models. It is shown that in a particular dynamical regime the model behaves as a unification of dark matter and phantom dark energy. Further, it is shown that the model may describe dark matter - dark energy unification in which dark energy asymptotically behaves as dark energy with a constant EoS parameter larger than -1. In a specific parameter regime the unified fluid model also reproduces global expansion similar to $\Lambda$CDM model with fluid speed of sound vanishing for small scale factor values and being small, or even vanishing, for large scale factor values. Finally, it is shown how the model may be instrumental in describing the cosmic fluid dark matter-dark energy-dark matter unification. Physical constraints on model parameters yielding such transient dark energy behavior are obtained.

    ↳ gr-qcastro-ph.COhep-phPLB(2019)·12 citations
23. 23*

    Neutrino physics with the PTOLEMY project: active neutrino properties and the light sterile case

    PTOLEMY collaboration · M.G. Betti🇮🇹 · M. Biasotti🇮🇹 · A. Boscá🇪🇸 · F. Calle🇪🇸 · G. Cavoto🇮🇹 · C. Chang🇺🇸 · A.G. Cocco🇮🇹 · A.P. Colijn🇳🇱 · J. Conrad🇸🇪 · N. D'Ambrosio🇮🇹 · N. De Groot🇳🇱 and 45 other authors

    The PTOLEMY project aims to develop a scalable design for a Cosmic Neutrino Background (CNB) detector, the first of its kind and the only one conceived that can look directly at the image of the Universe encoded in neutrino background produced in the first second after the Big Bang. The scope of the work for the next three years is to complete the conceptual design of this detector and to validate with direct measurements that the non-neutrino backgrounds are below the expected cosmological signal. In this paper we discuss in details the theoretical aspects of the experiment and its physics goals. In particular, we mainly address three issues. First we discuss the sensitivity of PTOLEMY to the standard neutrino mass scale. We then study the perspectives of the experiment to detect the CNB via neutrino capture on tritium as a function of the neutrino mass scale and the energy resolution of the apparatus. Finally, we consider an extra sterile neutrino with mass in the eV range, coupled to the active states via oscillations, which has been advocated in view of neutrino oscillation anomalies. This extra state would contribute to the tritium decay spectrum, and its properties, mass and mixing angle, could be studied by analyzing the features in the beta decay electron spectrum.

    ↳ astro-ph.COhep-exhep-phJCAP(2019)·254 citations
24. 24*

    Orbital angular momentum coupling in elastic photon-photon scattering

    Ramy Aboushelbaya🇬🇧 · Kevin Glize🇬🇧 · Alexander F. Savin🇬🇧 · Marko Mayr🇬🇧 · Benjamin Spiers🇬🇧 · Robin Wang🇬🇧 · John Collier🇬🇧 · Mattias Marklund🇸🇪 · Raoul M.G.M Trines🇬🇧 · Robert Bingham🇬🇧 · Peter A. Norreys🇬🇧

    In this letter, we investigate the effect of orbital angular momentum (OAM) on elastic photon-photon scattering in vacuum for the first time. We define exact solutions to the vacuum electro-magnetic wave equation which carry OAM. Using those, the expected coupling between three initialwaves is derived in the framework of an effective field theory based on the Euler-Heisenberg La-grangian and shows that OAM adds a signature to the generated photons thereby greatly improvingthe signal-to-noise ratio. This forms the basis for a proposed high-power laser experiment utilizingquantum optics techniques to filter the generated photons based on their OAM state

    ↳ physics.opticshep-phPRL(2019)·28 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.