Wed·Jan 13, 2016Wednesday·January 13, 2016

1. 01*

   Interpreting the 750 GeV diphoton excess in the Minimal Dilaton Model

   Junjie Cao🇨🇳 · Liangliang Shang🇨🇳 · Wei Su🇨🇳 · Yang Zhang🇨🇳 · Jingya Zhu🇨🇳

   We try to interpret the 750 GeV diphoton excess in the Minimal Dilaton Model, which extends the SM by adding one linearized dilaton field and vector-like fermions. We first show by analytic formulae in this framework that the production rates of the $\gamma \gamma$, $gg$, $Z\gamma$, $ZZ$, $W{W}^{\ast }$, $t\bar{t}$ and $hh$ signals at the $750\mathrm{GeV}$ resonance are only sensitive to the dilaton-Higgs mixing angle ${\theta }_S$ and the parameter $\eta \equiv v{N}_X/f$, where $f$ is the dilaton decay constant and $N_X$ denotes the number of the fermions. Then we scan the two parameters by considering various theoretical and experimental constraints to find the solutions to the diphoton excess. We conclude that the model can predict the central value of the diphoton rate without conflicting with any constraints. The signatures of our explanation at the LHC Run II and the vacuum stability at high energy scale are also discussed.

   hep-phhep-exEPJC(2016)·53 citations
2. 02*

   TMD Evolution at Moderate Hard Scales

   Ted C. Rogers🇺🇸 · John Collins🇺🇸

   We summarize some of our recent work on non-perturbative transverse momentum dependent (TMD) evolution, emphasizing aspects that are necessary for dealing with moderately low scale processes like semi-inclusive deep inelastic scattering.

   hep-phPoS(2016)·0 citations
3. 03*

   Building Blocks for Subleading Helicity Operators

   Daniel W. Kolodrubetz🇺🇸 · Ian Moult🇺🇸 · Iain W. Stewart🇺🇸

   On-shell helicity methods provide powerful tools for determining scattering amplitudes, which have a one-to-one correspondence with leading power helicity operators in the Soft-Collinear Effective Theory (SCET) away from singular regions of phase space. We show that helicity based operators are also useful for enumerating power suppressed SCET operators, which encode subleading amplitude information about singular limits. In particular, we present a complete set of scalar helicity building blocks that are valid for constructing operators at any order in the SCET power expansion. We also describe an interesting angular momentum selection rule that restricts how these building blocks can be assembled.

   hep-phJHEP(2016)·68 citations
4. 04*

   Hidden Gauged U(1) Model: Unifying Scotogenic Neutrino and Flavor Dark Matter

   Jiang-Hao Yu🇺🇸

   In both scotogenic neutrino and flavor dark matter models, the dark sector communicates with the standard model fermions via Yukawa portal couplings. We propose an economic scenario that scotogenic neutrino and flavored mediator share the same inert Higgs doublet and all are charged under a hidden gauged $U(1)$ symmetry. The dark Z2 symmetry in dark sector is regarded as the remnant of this hidden $U(1)$ symmetry breaking. In particular, we investigate a dark $U(1{)}_D$ (and also a $U(1{)}_{B-L}$) model which unifies scotogenic neutrino and top-flavored mediator. In this model dark tops and dark neutrinos are the standard model fermion partners, and the dark matter could be inert Higgs or the lightest dark neutrino. This model has rich collider signatures on dark tops, inert Higgs and Z' gauge boson, etc. Moreover, the scalar associated to the $U(1{)}_D$ (and also $U(1{)}_{B-L}$) symmetry breaking could explain the 750 GeV diphoton excess reported by ATLAS and CMS recently.

   hep-phPRD(2016)·54 citations
5. 05*

   New Signatures of Flavor Violating Higgs Couplings

   Malte Buschmann🇩🇪 · Joachim Kopp🇩🇪 · Jia Liu🇩🇪 · Xiao-Ping Wang (MITP, Johannes Gutenberg University Mainz)🇩🇪

   We explore several novel LHC signatures arising from quark or lepton flavor violating couplings in the Higgs sector, and we constrain such couplings using LHC data. Since the largest signals are possible in channels involving top quarks or tau leptons, we consider in particular the following flavor violating processes: (1) $pp\to thh$ (top plus di-Higgs final state) arising from a dimension six coupling of up-type quarks to three insertions of the Higgs field. We develop a search strategy for this final state and demonstrate that detection is possible at the high luminosity LHC if flavor violating top--up--Higgs couplings are not too far below the current limit. (2) $pp\to t{H}^0$, where $H^0$ is the heavy neutral CP-even Higgs boson in a two Higgs doublet model (2HDM). We consider the decay channels $H^0\to tu,WW,ZZ,hh$ and use existing LHC data to constrain the first three of them. For the fourth, we adapt our search for the $thh$ final state, and we demonstrate that in large regions of the parameter space, it is superior to other searches, including searches for flavor violating top quark decays ($t\to hq$). (3) $H^0\to \tau \mu$, again in the context of a 2HDM. This channel is particularly well motivated by the recent CMS excess in $h\to \tau \mu$, and we use the data from this search to constrain the properties of $H^0$.

   hep-phJHEP(2016)·56 citations
6. 06*

   On the reduction of generalized polylogarithms to ${\text{Li}}_n$ and ${\text{Li}}_{2,2}$ and on the evaluation thereof

   Hjalte Frellesvig🇬🇷 · Damiano Tommasini🇬🇷 · Christopher Wever🇬🇷

   We give expressions for all generalized polylogarithms up to weight four in terms of the functions log, ${\text{Li}}_n$, and ${\text{Li}}_{2,2}$, valid for arbitrary complex variables. Furthermore we provide algorithms for manipulation and numerical evaluation of ${\text{Li}}_n$ and ${\text{Li}}_{2,2}$, and add codes in Mathematica and C++ implementing the results. With these results we calculate a number of previously unknown integrals, which we add in App. C.

   hep-phcs.NAhep-thmath.NAJHEP(2016)·88 citations
7. 07*

   Two Higgs doublet models with an $S_3$ symmetry

   D. Cogollo🇧🇷 · João P. Silva🇵🇹

   We study all implementations of the $S_3$ symmetry in the two Higgs doublet model with quarks, consistent with non-zero quark masses and a Cabibbo-Kobayashi-Maskawa (CKM) matrix which is not block diagonal. We study the impact of the various soft-breaking terms and vacuum expectation values, and find an interesting relation between $\alpha$ and $\beta$. We also show that, in this minimal setting, only two types of assignments are possible: either all field sectors are in singlets or all field sectors have a doublet.

   hep-phPRD(2016)·19 citations
8. 08*

   Effect of four-fermion operators on the mass of the composite particles

   Roshan Foadi

   We propose a theoretical framework for evaluating the effect of four-fermion operators on the mass of composite particles in confining strongly-coupled gauge theories. The confining sector is modelled by a non-local Nambu-Jona Lasinio action, whereas the four-fermion operators, arising from a different sector, are local. In order to illustrate the method, we investigate a simple toy model with a global $SU(2{)}_L\times SU(2{)}_R\to SU(2{)}_V$ symmetry breaking, and a four-fermion operator breaking $SU(2{)}_L\times SU(2{)}_R$ but preserving $SU(2{)}_V$. In the particle spectrum we only include the pseudoscalar isospin triplet, that is the pseudo-Nambu-Goldstone bosons associated with chiral symmetry breaking, and the lightest scalar singlet. After checking that the nonlocal model successfully accounts for the experimental results in two-flavour QCD, we investigate the mass spectrum as a function of the four-fermion coupling. For our specific choice of four-fermion operator, we find that the mass of the pseudoscalar triplet grows, whereas the mass of the lightest scalar singlet is approximately unaffected, as the four-fermion coupling grows. We argue that these results can be directly tested on the lattice, and briefly discuss possible applications of this technique to models of dynamical electroweak symmetry breaking.

   hep-ph1 citation
9. 09*

   Wish-list for Run II top quark measurements (for BSM)

   Roberto Franceschini🇨🇭

   In this contribution I will highlight the new challenges for top quark physics at LHC Run II, focusing in particular on the interplay between precision studies on the top quark and searches for new physics. A new strategy to search for subtle scenarios of new physics is envisaged. The ability of compute and measure very accurately top quark properties such as its production rate, decay properties, e.g rates and distributions, and variables sensitive to the top quark mass is put at the center of this strategy to probe new physics.

   hep-ph5 citations
10. 10*

    Interpretation of 750 GeV Diphoton Excess at LHC in Singlet Extension of Color-octet Neutrino Mass Model

    Ran Ding (Peking Univ.)🇨🇳 · Zhi-Long Han (Nankai Univ.)🇨🇳 · Yi Liao (ITP-CAS, Peking Univ, Nankai Univ.)🇨🇳 · Xiao-Dong Ma (Nankai Univ.)🇨🇳

    We propose that the possible 750 GeV diphoton excess can be explained in the color-octet neutrino mass model extended with a scalar singlet $\Phi$. The model generally contains $N_s$ species of color-octet, electroweak doublet scalars $S$ and $N_f$ species of color-octet, electroweak triplet $\chi$ or singlet $\rho$ fermions. While both scalars and fermions contribute to the production of $\Phi$ through gluon fusion, only the charged members induce the diphoton decay of $\Phi$. The diphoton rate can be significantly enhanced due to interference between the scalar and fermion loops. We show that the diphoton cross section can be from 3 to 10 fb for O(TeV) color-octet particles while evading all current LHC limits.

    hep-phEPJC(2016)·58 citations
11. 11*

    Constraints on the virtual Compton scattering on the nucleon in a new dispersive formalism

    Irinel Caprini🇷🇴

    The dispersive representation of the virtual Compton forward scattering amplitude has been recently reexamined in connection with the evaluation of the Cottingham formula for the proton-neutron electromagnetic mass difference. The most difficult part of the analysis is related to one of the invariant amplitudes, denoted as $T_1(\nu ,Q^2)$, which requires a subtraction in the standard dispersion relation with respect to the energy $\nu$ at fixed photon momentum squared $q^2=-Q^2$. We propose an alternative dispersive framework, which implements analyticity and unitarity by combining the Cauchy integral relation at low and moderate energies with the modulus representation of the amplitude at high energies. Using techniques of functional analysis, we derive a necessary and sufficient condition for the consistency with analyticity of the subtraction function $S_1(Q^2)=T_1(0,Q^2)$, the electron-proton cross sections measured at low and moderate energies and the Regge model assumed to be valid at high energies. From this condition we obtain model-independent constraints on the subtraction function, confronting them with the available information on nucleon magnetic polarizabilities and results reported recently in the literature. The formalism can be used also for testing the existence of a fixed pole at $J=0$ in the angular momentum plane, but more accurate data are necessary for a definite answer.

    hep-phPRD(2016)·13 citations
12. 12*

    Fragmentation functions of the pion, kaon, and proton in the NLO approximation: Laplace transform approach

    M. Zareei🇮🇷 · F. Taghavi-Shahri🇮🇷 · S. Atashbar Tehrani🇮🇷 · M. Sarbishei🇮🇷

    Using repeated Laplace transform, We find an analytical solution for DGLAP evolution equations for extracting the pion, kaon and proton Fragmentation Functions (FFs) at NLO approximation. We also study the symmetry breaking of the sea quarks Fragmentation Functions, $D_{\bar{q}}^h(z,Q^2)$ and simply separated them according to their mass ratio. Finally, we calculate the total Fragmentation Functions of these hadrons and compare them with experimental data and those from global fits. Our results show a good agreement with the FFs obtained from global parameterizations as well as with the experimental data.

    hep-phPRD(2015)·16 citations
13. 13*

    Hidden-charm Pentaquark States in Heavy Ion Collisions at the Large Hadron Collider

    Rui-Qin Wang🇨🇳 · Jun Song🇨🇳 · Kai-Jia Sun🇨🇳 · Lie-Wen Chen🇨🇳 · Gang Li🇨🇳 · Feng-Lan Shao🇨🇳

    In the framework of the quark combination, we derive the yield formulas and study the yield ratios of the hidden-charm pentaquark states in ultra-relativistic heavy ion collisions. We propose some interesting yield ratios which clearly exhibit the production relationships between different hidden-charm pentaquark states. We show how to employ a specific quark combination model to evaluate the yields of exotic $P_c^{+}(4380)$, $P_c^{+}(4450)$ and their partners on the basis of reproducing the yields of normal identified hadrons, and execute the calculations in central Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV as an example.

    hep-phnucl-exnucl-thPRC(2016)·19 citations
14. 14*

    Software for calculations of the Higgs boson lineshape in future lepton colliders

    S. Jadach🇵🇱 · R.A. Kycia🇵🇱

    Simple software for Monte Carlo(MC) calculation of the Higgs boson lineshape and its beam broadening effect by the beam energy dispersion was described. The software bases on FOAM [4] adaptive MC integrator from ROOT library [2]. The software is intended for those who want to reproduce results from paper [3] and experiment with different parameters for the lineshapes and QCD correction factors. Parallel version of the software based on MPI [10] is also described.

    hep-phTECHNICAL TRANSACTIONS 6/2017·0 citations
15. 15*

    Intrinsic bottom and its impact on heavy new physics at the LHC

    Florian Lyonnet🇺🇸

    Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that the charm and bottom PDFs are generated perturbatively by gluon splitting and do not involve any non-perturbative degrees of freedom. On the other hand, non- perturbative, intrinsic heavy quark parton distributions have been predicted in the literature. We demonstrate that to a very good approximation the scale-evolution of the intrinsic heavy quark content of the nucleon is governed by non-singlet evolution equations. This allows to analyze the intrinsic heavy quark distributions without having to resort to a full-fledged global analysis of parton distribution functions. We exploit this freedom to model intrinsic bottom distributions which are so far missing in the literature. We estimate the impact of the non-perturbative contribution to the charm and bottom-quark PDFs and on several important parton-parton luminosities at the LHC.

    hep-phEPJ Web Conf.(2016)·2 citations
16. 16*

    Low energy IceCube data and a possible Dark Matter related excess

    Marco Chianese🇮🇹 · Gennaro Miele🇮🇹 · Stefano Morisi🇮🇹 · Edoardo Vitagliano🇩🇪

    In this Letter we focus our attention on the IceCube events in the energy range between 60 and 100 TeV, which show an order 2-sigma excess with respect to a power-law with spectral index 2. We analyze the possible origin of such an excess by comparing the distribution of the arrival directions of IceCube events with the angular distributions of simply distributed astrophysical galactic/extragalactic sources, as well as with the expected flux coming from DM interactions (decay and annihilation) for different DM profiles. The statistical analysis performed seems to disfavor the correlation with the galactic plane, whereas rules out the DM annihilation scenario only in case of small clumpiness effect. The small statistics till now collected does not allow to scrutinize the cases of astrophysical isotropic distribution and DM decay scenarios. For this reason we perform a forecast analysis in order to stress the role of future Neutrino Telescopes.

    hep-phastro-ph.COastro-ph.HEhep-exPLB(2016)·63 citations
17. 17*

    Superheavy Light Quarks and the Strong P, T Problem

    Frank Wilczek🇺🇸 · Guy Moore🇩🇪

    New superstrong forces, analogous to QCD but featuring a larger mass scale, should they exist, would offer new possibilities for addressing the strong P, T, problem. One can implement the "massless quark" solution in a phenomenologically acceptable way, by using a massless quark that is always confined within superheavy particles, and is therefore effectively superheavy: a cryptoquark. Assuming confinement and chiral symmetry breaking from the superstrong dynamics, we find a new mechanism to generate an axion field without introducing new fundamental scalar fields.

    hep-phhep-th9 citations
18. 18*

    NNNLO determination of the bottom-quark mass from non-relativistic sum rules

    Martin Beneke🇩🇪 · Andreas Maier🇬🇧 · Jan Piclum🇨🇭 · Thomas Rauh🇩🇪

    The mass of the bottom quark can be determined with high precision from moments of the pair-production cross section sigma(e+ e- -> b bbar) near threshold. We present the first complete NNNLO determination from non-relativistic sum rules, obtaining a bottom-quark mass of mb^PS(2 GeV) = (4.532 +0.013 -0.039) GeV in the potential-subtracted scheme. For the mass in the MSbar scheme we find mb^MS(mb^MS) = (4.203 +0.016 -0.034) GeV using the recently computed four-loop correction to the scheme conversion.

    hep-phPoS(2016)·18 citations
19. 19*

    Off-shell amplitudes as boundary integrals of analytically continued Wilson line slope

    Piotr Kotko🇺🇸 · Mirko Serino🇵🇱 · Anna M. Stasto🇺🇸

    One of the methods to calculate tree-level multi-gluon scattering amplitudes is to use the Berends-Giele recursion relation involving off-shell currents or off-shell amplitudes, if working in the light cone gauge. As shown in recent works using the light-front perturbation theory, solutions to these recursions naturally collapse into gauge invariant and gauge-dependent components, at least for some helicity configurations. In this work, we show that such structure is helicity independent and emerges from analytic properties of matrix elements of Wilson line operators, where the slope of the straight gauge path is shifted in a certain complex direction. This is similar to the procedure leading to the Britto-Cachazo-Feng-Witten (BCFW) recursion, however we apply a complex shift to the Wilson line slope instead of the external momenta. While in the original BCFW procedure the boundary integrals over the complex shift vanish for certain deformations, here they are non-zero and are equal to the off-shell amplitudes. The main result can thus be summarized as follows: we derive a decomposition of a helicity-fixed off-shell current into gauge invariant component given by a matrix element of a straight Wilson line plus a reminder given by a sum of products of gauge invariant and gauge dependent quantities. We give several examples realizing this relation, including the five-point next-to-MHV helicity configuration.

    hep-phhep-thJHEP(2016)·6 citations
20. 20*

    NNLL resummation for stop pair-production at the LHC

    Wim Beenakker🇳🇱 · Christoph Borschensky🇩🇪 · Raphael Heger🇩🇪 · Michael Krämer🇩🇪 · Anna Kulesza🇩🇪 · Eric Laenen🇳🇱

    The production of supersymmetric stop-antistop pairs at the Large Hadron Collider (LHC) is studied including corrections from soft-gluon resummation up to next-to-next-to-leading logarithmic (NNLL) accuracy in the Mellin-space approach. Additionally, corrections to the hard-matching coefficient at one-loop and Coulomb contributions at two-loop order are considered. The NNLL corrections enhance the cross section for all stop masses at centre-of-mass energies of 8 and 13 TeV compared to the previously calculated predictions at next-to-leading logarithmic (NLL) accuracy. Furthermore, a slight increase in the dependence on the additional stop-mixing parameters is observed.

    hep-phJHEP(2016)·127 citations
21. 21*

    Nuclear collisions at the Future Circular Collider

    N. Armesto🇪🇸 · A. Dainese🇮🇹 · D. d'Enterria🇨🇭 · S. Masciocchi🇩🇪 · C. Roland🇺🇸 · C.A. Salgado🇪🇸 · M. van Leeuwen🇳🇱 · U.A. Wiedemann🇨🇭

    The Future Circular Collider is a new proposed collider at CERN with centre-of-mass energies around 100 TeV in the pp mode. Ongoing studies aim at assessing its physics potential and technical feasibility. Here we focus on updates in physics opportunities accessible in pA and AA collisions not covered in previous Quark Matter contributions, including Quark-Gluon Plasma and gluon saturation studies, novel hard probes of QCD matter, and photon-induced collisions.

    hep-phhep-exnucl-exnucl-thNPA(2016)·10 citations
22. 22*

    Electromagnetic Radiation from QCD Matter: Theory Overview

    Chun Shen (McGill U.)🇨🇦

    Recent theory developments in electromagnetic radiation from relativistic heavy-ion collisions are reviewed. Electromagnetic observables can serve as a thermometer, a viscometer, and tomographic probes to the collision system. The current status of the "direct photon flow puzzle" is highlighted.

    ↳ nucl-thhep-phnucl-exNPA(2016)·42 citations
23. 23*

    Jets in d(p)-A Collisions: Color Transparency or Energy Conservation

    Michael Kordell II🇺🇸 · Abhijit Majumder🇺🇸

    The production of jets, and high momentum hadrons from jets, produced in deuteron ($d$)-$Au$ collisions at the relativistic heavy-ion collider (RHIC) and proton ($p$)-$Pb$ collisions at the large hadron collider (LHC) are studied as a function of centrality, a measure of the impact parameter of the collision. A modified version of the event generator PYTHIA, widely used to simulate $p$-$p$ collisions, is used in conjunction with a nuclear Monte-Carlo event generator which simulates the locations of the nucleons within a large nucleus. We demonstrate how events with a hard jet may be simulated, in such a way that the parton distribution function of the projectile is frozen during its interaction with the extended nucleus. Using our approach, we demonstrate that the puzzling enhancement seen in peripheral events at RHIC and the LHC, as well as the suppression seen in central events at the LHC are mainly due to mis-binning of central and semi-central events, containing a jet, as peripheral events. This occurs due to the suppression of soft particle production away from the jet, caused by the depletion of energy available in a nucleon of the deuteron (in $d$-$Au$ at RHIC) or in the proton (in $p$-$Pb$ at LHC), after the production of a hard jet. We conclude that partonic correlations built out of simple energy conservation are mostly responsible for such an effect.

    ↳ nucl-thhep-phnucl-exPRC(2018)·37 citations
24. 24*

    The Standard Model: How far can it go and how can we tell?

    Jon Butterworth🇬🇧

    The Standard Model of particle physics encapsulates our current best understanding of physics at the smallest distances and highest energies. It incorporates Quantum Electrodynamics (the quantised version of Maxwell's electromagnetism) and the weak and strong interactions, and has survived unmodified for decades, save for the inclusion of non-zero neutrino masses after the observation of neutrino oscillations in the late 1990s. It describes a vast array of data over a wide range of energy scales. I review a selection of these successes, including the remarkably successful prediction of a new scalar boson, a qualitatively new kind of object observed in 2012 at the Large Hadron Collider. New calculational techniques and experimental advances challenge the Standard Model across an ever-wider range of phenomena, now extending significantly above the electroweak symmetry breaking scale. I will outline some of the consequences of these new challenges, and briefly discuss what is still to be found.

    ↳ hep-exhep-phphysics.hist-phPhil.Trans.Roy.Soc.Lond.A(2016)·18 citations
25. 25*

    Charge-sign dependent solar modulation for everyone

    Rolf Kappl🇩🇪

    We present a tool to compute the influence of charge-sign dependent solar modulation for cosmic ray spectra. The code is publicly available, easy to use and offers an extended view on solar modulation compared to the force-field approximation. We present some examples for proton and antiproton fluxes in the light of recent experimental data.

    ↳ astro-ph.HEhep-phJ.Phys.Conf.Ser.(2016)·3 citations
26. 26*

    Proposal of the Electrically Charged Stellar Black Holes as Accelerators of Ultra High Energy Cosmic Rays

    Jose Soto-Manriquez🇲🇽

    A new mechanism for the acceleration of ultra high energy cosmic rays (UHECRs) is presented here. It is based on the tunnel-ionization of neutral atoms approaching electrically charged stellar black holes and on the repulsion of the resulting positively charged atomic part by huge, long range electric fields. Energies above $10^{18}$ eV for these particles are calculated in a simple way by means of this one-by-one, all-electrical model. When this acceleration mechanism is combined with the supernova (SN) explosion in the galactic halo of the massive runaway stars expelled from the galactic disk, then the various results obtained are shown to be compatible with virtually all the main observational facts about these UHECRs. Among these facts, this model predicts nearly the correct values of the measured top energy of the UHECRs and their flux in a specified EeV energy range. It also explains the near isotropy of arrivals of these energetic particles to Earth, as it has recently been measured by the Auger Observatory.

    ↳ astro-ph.HEgr-qchep-ph1 citation
27. 27*

    Fine-structure constant constraints on dark energy: II. Extending the parameter space

    C. J. A. P. Martins🇵🇹 · A. M. M. Pinho🇵🇹 · P. Carreira🇬🇾 · A. Gusart · J. López · C. I. S. A. Rocha🇵🇹

    Astrophysical tests of the stability of fundamental couplings, such as the fine-structure constant $\alpha$, are a powerful probe of new physics. Recently these measurements, combined with local atomic clock tests and Type Ia supernova and Hubble parameter data, were used to constrain the simplest class of dynamical dark energy models where the same degree of freedom is assumed to provide both the dark energy and (through a dimensionless coupling, $\zeta$, to the electromagnetic sector) the $\alpha$ variation. One caveat of these analyses was that it was based on fiducial models where the dark energy equation of state was described by a single parameter (effectively its present day value, $w_0$). Here we relax this assumption and study broader dark energy model classes, including the Chevallier-Polarski-Linder and Early Dark Energy parametrizations. Even in these extended cases we find that the current data constrains the coupling $\zeta$ at the $10^{-6}$ level and $w_0$ to a few percent (marginalizing over other parameters), thus confirming the robustness of earlier analyses. On the other hand, the additional parameters are typically not well constrained. We also highlight the implications of our results for constraints on violations of the Weak Equivalence Principle and improvements to be expected from forthcoming measurements with high-resolution ultra-stable spectrographs.

    ↳ astro-ph.COgr-qchep-phhep-thPRD(2016)·25 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.