Wed·Jan 18, 2017Wednesday·January 18, 2017

1. 01*

   ttbb as a probe of New Physics at the LHC

   Ezequiel Alvarez🇦🇷 · Mariel Estevez (ICAS, Argentina)🇦🇷

   We study the $t\bar{t}b\bar{b}$ final state at the LHC as a probe of New Physics that couples mainly to third generation of quarks. We analyze New Physics simplified models with resonances of spin 0, 1 and 2. The sensitivity of the final states $t\bar{t}b\bar{b}$, $t\bar{t}t\bar{t}$, $b\bar{b}b\bar{b}$ and $t\bar{t}$ on each of these models is used to identify an important region in parameter space that is still not excluded and where $t\bar{t}b\bar{b}$ is the most sensitive final state. We indicate possible experimental hints and discuss potential issues of observables that rely mainly in Montecarlo predictions. A new observable is proposed that, at the price of requiring more statistics, reduces the impact of Montecarlo predictions. We use preliminary 13 TeV results to give a raw estimate on the discovery reach and propose simple improvements on the observables.

   hep-phhep-exPRD(2017)·7 citations
2. 02*

   Dark Matter in B-L Supersymmetric Standard Model with Inverse Seesaw

   W. Abdallah🇪🇬 · S. Khalil🇪🇬

   We show that the $B-L$ Supersymmetric Standard Model with Inverse Seesaw (BLSSMIS) provides new Dark Matter (DM) candidates (lightest right-handed sneutrino and lightest $B-L$ neutralino) with mass of order few hundreds GeV, while most of other SUSY spectrum can be quite heavy, consistently with the current Large Hadron Collider (LHC) constraints. We emphasize that the thermal relic abundance and direct detection experiments via relic neutralino scattering with nuclei impose stringent constraints on the $B-L$ neutralinos. These constraints can be satisfied by few points in the parameter space where the $B-L$ lightest neutralino is higgsino-like, which cannot explain the observed Galactic Center (GC) gamma-ray excess measured by Fermi-LAT. The lightest right-handed sneutrino DM is analysed. We show that for a wide region of parameter space the lightest right-handed sneutrino, with mass between 80 GeV and 1.2 TeV, can satisfy the limits of the relic abundance and the scattering cross with nuclei. We also show that the lightest right-handed sneutrino with mass $\mathcal{O}(100)$ GeV can account for the observed GC gamma-ray results.

   hep-phJCAP(2017)·16 citations
3. 03*

   Resonant Di-Higgs Production in the $b\bar{b}WW$ Channel: Probing the Electroweak Phase Transition at the LHC

   T. Huang🇺🇸 · J. M. No🇬🇧 · L. Pernié🇺🇸 · M. Ramsey-Musolf🇺🇸 · A. Safonov🇺🇸 · M. Spannowsky🇬🇧 · P. Winslow🇺🇸

   We analyze the prospects for resonant di-Higgs production searches at the LHC in the $b\bar{b}{W}^{+}{W}^{-}$ ($W^{+}\to {\ell }^{+}{\nu }_{\ell }$, $W^{-}\to {\ell }^{-}{\bar{\nu }}_{\ell }$) channel, as a probe of the nature of the electroweak phase transition in Higgs portal extensions of the Standard Model. In order to maximize the sensitivity in this final state, we develop a new algorithm for the reconstruction of the $b\bar{b}{W}^{+}{W}^{-}$ invariant mass in the presence of neutrinos from the $W$ decays, building from a technique developed for the reconstruction of resonances decaying to ${\tau }^{+}{\tau }^{-}$ pairs. We show that resonant di-Higgs production in the $b\bar{b}{W}^{+}{W}^{-}$ channel could be a competitive probe of the electroweak phase transition already with the datasets to be collected by the CMS and ATLAS experiments in Run-2 of the LHC. The increase in sensitivity with larger amounts of data accumulated during the High Luminosity LHC phase can be sufficient to enable a potential discovery of the resonant di-Higgs production in this channel.

   hep-phhep-exPRD(2017)·104 citations
4. 04*

   Pascalutsa-Vanderhaeghen light-by-light sumrule from photon-photon collisions

   Ling-Yun Dai🇩🇪 · M.R. Pennington🇺🇸

   Light-by-light scattering sumrules based on general field theory principles relate cross-sections with different helicities. In this paper the simplest sumrule is tested for the $I=0$ and $2$ channels for "real" photon-photon collisions. Important contributions come from the long-lived pseudoscalar mesons and from di-meson intermediate states. The latest Amplitude Analysis of $\gamma \gamma \to \pi \pi ,\overline{K}K$ allows this contribution to be evaluated. However, we find that other multi-meson contributions up to 2.5 GeV are required to satisfy the sumrules. While data on three and four pion cross-sections exist, there is no information about their isospin and helicity decomposition. Nevertheless, we show the measured cross-sections are sufficiently large to ensure the sumrules for the helicity differences are likely fulfilled.

   hep-phnucl-thPRD(2017)·8 citations
5. 05*

   Spectra of charmed and bottom baryons with hyperfine interaction

   Zhen-Yang Wang🇨🇳 · Ke-Wei Wei🇨🇳 · Jing-Juan Qi🇨🇳 · Xin-Heng Guo🇨🇳

   Up to now, the excited charmed and bottom baryon states are still not well studied both experimentally and theoretically. In the present paper, we predict the mass of ${\Omega }_b^{\ast }$, the only $L=0$ baryon state which has not been observed, to be 6069.2 MeV. The spectra of charmed and bottom baryons with the orbital angular momentum $L=1$ are studied in two popular constituent quark models, the Goldstone boson exchange (GBE) and the one gluon exchange (OGE) hyperfine interaction models, respectively. Inserting the latest experimental data from the "Review of Particle Physics", we find that in the GBE model, there exist some multiplets (${\Sigma }_{c(b)}$, ${\Xi }_{c(b)}^{\prime }$ and ${\Omega }_{c(b)}$) which total spins of three quarks in their lowest energy states are 3/2, but in the OGE model there is no such phenomenon. This is the most important difference between the GBE and OGE models. These results can be tested in the near future. We suggest more efforts to study the excited charmed and bottom baryons both theoretically and experimentally, not only for the abundance of baryon spectra, but also for determining which hyperfine interaction model is realized in nature.

   hep-phCPC(2017)·16 citations
6. 06*

   The NLO QCD corrections to $B_c$($B_c^{\ast }$) production around $Z$ pole at an $e^{+}{e}^{-}$ collider

   Xu-Chang Zheng🇨🇳 · Chao-Hsi Chang🇨🇳 · Tai-Fu Feng🇨🇳 · Zan Pan🇨🇳

   Production of the $B_c$ and $B_c^{\ast }$ mesons at $Z$-factory (an $e^{+}{e}^{-}$ collider running at energies around $Z$ pole) is calculated up-to the next-to-leading order (NLO) QCD corrections. The results show that the dependence of the total cross sections on the renormalization scale $\mu$ is reduced by the corrections, and the NLO corrections enhance the production cross section by $52\%$($33\%$) when the renormalization scale is taken at $\mu =2m_b$. For experimental observations of the $B_c$ and $B_c^{\ast }$ mesons, the differential cross sections for the production are also analyzed up-to the NLO accuracy.

   hep-phSCPMA(2018)·20 citations
7. 07*

   Natural emergence of neutrino masses and dark matter from $R$-symmetry

   Sabyasachi Chakraborty🇮🇳 · Joydeep Chakrabortty🇮🇳

   We propose a supersymmetric extension of the Standard Model (SM) with a continuous global $U(1{)}_R$ symmetry. The $R$-charges of the SM fields are identified with that of their lepton numbers. As a result, both bilinear and trilinear `$R$-parity violating' (RPV) terms could be present at the superpotential. However, $R$-symmetry is not an exact symmetry as it is broken by supergravity effects. Hence, sneutrinos acquire a small vacuum expectation value in this framework. However, a suitable choice of basis ensures that the bilinear RPV terms can be completely rotated away from the superpotential and the scalar potential. On the other hand, the trilinear terms play a very crucial role in generating neutrino masses and mixing at the tree level. This is noticeably different from the typical $R$-parity violating Minimal Supersymmetric Standard Model. Also, gravitino mass turns out to be the order parameter of $R$-breaking and is directly related to the neutrino mass. We show that such a gravitino, within the mass range $200\text{keV}\lesssim m_{3/2}\lesssim 0.1\text{GeV}$ can be an excellent dark matter candidate. Finally, we looked into the collider implications of our framework.

   hep-phJHEP(2017)·12 citations
8. 08*

   Higgs boson compositeness: from $e^{+}{e}^{-}\to ZH$ to $e^{+}{e}^{-}\to Z_L,W_L+anything$

   Fernand M. Renard🇫🇷

   We assume that the Higgs doublet has a composite structure, respecting the main standard model properties, and therefore called Composite Standard Model (CSM), but leading (through Goldstone equivalence) to $Z_L$ and $W_L$ form factors. We illustrate how such a form factor affecting the $Z{Z}_{L}H$ coupling will be directly observable in $e^{+}{e}^{-}\to ZH$. We then show the spectacular consequences which would appear in the inclusive processes $e^{+}{e}^{-}\to Z_L+anything$. Such a form factor could also affect the $\gamma W_L^{+}{W}_L^{-}$ and $Z{W}_L^{+}{W}_L^{-}$ vertices and we show what effects this would generate in $e^{+}{e}^{-}\to W^{+}{W}^{-}$ (especially in $e^{+}{e}_R^{-}\to W_L^{+}{W}_L^{-}$) and in $e^{+}{e}^{-}\to W_L+anything$. We finally mention the $\gamma \gamma \to W^{+}{W}^{-}$ process and several other processes in hadronic collisions which could be similarly affected.

   hep-ph7 citations
9. 09*

   Study of ${\rm Y}(nS)$ $\to$ $B_{c}P$ decays with perturbative QCD approach

   Yueling Yang🇨🇳 · Junfeng Sun🇨🇳 · Yan Guo🇨🇳 · Qingxia Li🇨🇳 · Jinshu Huang🇨🇳 · Qin Chang🇨🇳

   With the potential prospects of the ${\rm Y}(nS)$ at high-luminosity dedicated heavy-flavor factories, the color-favored ${\rm Y}(nS)$ $\to$ $B_c\pi$, $B_{c}K$ weak decays are studied with the pQCD approach. It is found that branching ratios for the ${\rm Y}(nS)$ $\to$ $B_c\pi$ decay are as large as the order of $\mathcal{O}(10^{-11})$, which might be measured promisingly by the future experiments.

   hep-phhep-exPLB(2015)·17 citations
10. 10*

    The ${\rm Y}(nS)$ $\to$ $B_c{D}_s$, $B_c{D}_d$ decays with perturbative QCD approach

    Junfeng Sun🇨🇳 · Yueling Yang🇨🇳 · Qingxia Li🇨🇳 · Haiyan Li🇨🇳 · Qin Chang🇨🇳 · Jinshu Huang🇨🇳

    The ${\rm Y}(nS)$ $\to$ $B_c{D}_s$, $B_c{D}_d$ weak decays are studied with the pQCD approach firstly. It is found that branching ratios $\mathcal{B}r({\rm Y}(nS)\to B_c{D}_s)$ $\sim$ $\mathcal{O}(10^{-10})$ and $\mathcal{B}r({\rm Y}(nS)\to B_c{D}_d)$ $\sim$ $\mathcal{O}(10^{-11})$, which might be measurable in the future experiments.

    hep-phhep-exPLB(2016)·14 citations
11. 11*

    Precision Theoretical Analysis of Neutron Radiative Beta Decay

    A. N. Ivanov🇦🇹 · R. Höllwieser🇺🇸 · N. I. Troitskaya🇦🇹 · M. Wellenzohn🇦🇹 · Ya. A. Berdnikov🇷🇺

    In the Standard Model of electroweak interactions and in the tree--approximation we calculate the rate and branching ratio of the neutron radiative beta decay with one-real photon emission by taking into account the contributions of the weak magnetism and proton recoil to order 1/m_p of the large proton mass m_p expansion. We find that the obtained contributions of the weak magnetism and proton recoil increase the rate and branching ratio of the neutron radiative beta decay by about 0.70%. This is large compared with the contribution of the weak magnetism and proton recoil of about 0.16% to the rate of the neutron beta decay, calculated in Phys. Rev. D88, 073002 (2013).

    hep-phhep-exnucl-exPRD(2017)·8 citations
12. 12*

    The Method of Arbitrarily Large Moments to Calculate Single Scale Processes in Quantum Field Theory

    Johannes Blümlein🇩🇪 · Carsten Schneider🇦🇹

    We device a new method to calculate a large number of Mellin moments of single scale quantities using the systems of differential and/or difference equations obtained by integration-by-parts identities between the corresponding Feynman integrals of loop corrections to physical quantities. These scalar quantities have a much simpler mathematical structure than the complete quantity. A sufficiently large set of moments may even allow the analytic reconstruction of the whole quantity considered, holding in case of first order factorizing systems. In any case, one may derive highly precise numerical representations in general using this method, which is otherwise completely analytic.

    hep-phcs.SChep-lathep-th+2PLB(2017)·53 citations
13. 13*

    Strong CP Problem and spontaneous generation of CP violating phase in CKM matrix

    Wei Liao🇨🇳

    We show that in a Complementary two-Higgs doublet model(C2HDM) the CP violating phase in the CKM matrix can be generated spontaneously, dangerous FCNC can be naturally suppressed and the strong CP problem can also be avoided. The two Higgs doublets in the model are complementary in the sense that none of them is enough to describe masses of a given type of quarks. We find that the strength of FCNC is suppressed by the strength of Yukawa couplings of the first generation quark and the tree-level FCNC is sufficiently small. Using an explicit example, we show that radiative correction to the assumed Yukawa couplings can modify the discussion about the strong $\theta$. The correction to the strong $\theta$ is estimated to be less than around $10^{-12}\sim 10^{-10}$ which can be tested in future experiment.

    hep-phPRD(2017)·2 citations
14. 14*

    A Simple Method to detect spontaneous CP Violation in multi-Higgs models

    O. M. Ogreid🇳🇴 · P. Osland🇳🇴 · M. N. Rebelo🇵🇹

    For models with several Higgs doublets we present an alternative method to the one proposed by Branco, Gerard and Grimus, in 1984, to check whether or not CP is spontaneously violated in the Higgs potential. The previous method is powerful and rigorous. It requires the identification of a matrix $U$ corresponding to a symmetry of the Lagrangian and verifying a simple relation involving the vacuum expectation values. The nonexistence of such a matrix signals spontaneous CP violation. However, as the number of Higgs doublets increases, finding such a matrix $U$ may not be straightforward and it may turn out to be easier to analyse the potential by going to the so-called Higgs basis. The transformation to the Higgs basis is straightforward once the vacuum expectation values are known. The method proposed in this work is also powerful and rigorous and can be particularly useful to analyse models with more than two Higgs doublets and with continuous symmetries.

    hep-phJHEP(2017)·16 citations
15. 15*

    Supersymmetric Majoron Inflation

    Stephen F. King🇬🇧 · Patrick Otto Ludl🇬🇧

    We propose supersymmetric Majoron inflation in which the Majoron field $\Phi$ responsible for generating right-handed neutrino masses may also be suitable for giving low scale "hilltop" inflation, with a discrete lepton number $Z_N$ spontaneously broken at the end of inflation, while avoiding the domain wall problem. In the framework of non-minimal supergravity, we show that a successful spectral index can result with small running together with small tensor modes. We show that a range of heaviest right-handed neutrino masses can be generated, $m_N\sim 10^1-10^{16}$ GeV, consistent with the constraints from reheating and domain walls.

    hep-phJHEP(2017)·7 citations
16. 16*

    Dimension-6 Operator Analysis of the CLIC Sensitivity to New Physics

    John Ellis🇬🇧 · Philipp Roloff🇨🇭 · Veronica Sanz🇬🇧 · Tevong You🇬🇧

    We estimate the possible accuracies of measurements at the proposed CLIC $e^{+}{e}^{-}$ collider of Higgs and $W^{+}{W}^{-}$ production at centre-of-mass energies up to 3TeV, incorporating also Higgsstrahlung projections at higher energies that had not been considered previously, and use them to explore the prospective CLIC sensitivities to decoupled new physics. We present the resulting constraints on the Wilson coefficients of dimension-6 operators in a model-independent approach based on the Standard Model effective field theory (SM EFT). The higher centre-of-mass energy of CLIC, compared to other projects such as the ILC and CEPC, gives it greater sensitivity to the coefficients of some of the operators we study. We find that CLIC Higgs measurements may be sensitive to new physics scales $\Lambda =\mathcal{O}(10)$TeV for individual operators, reduced to $\mathcal{O}(1)$ TeV sensitivity for a global fit marginalising over the coefficients of all contributing operators. We give some examples of the corresponding prospective constraints on specific scenarios for physics beyond the SM, including stop quarks and the dilaton/radion.

    hep-phhep-exJHEP(2017)·62 citations
17. 17*

    Phenomenology of strangeness production at high energies

    Abdel Nasser Tawfik (Egyptian Ctr. Theor. Phys., Cairo, WLCAPP, Cairo)🇪🇬 · Hayam Yassin🇪🇬 · Eman R. Abo Elyazeed (Ain Shams U., Cairo)🇪🇬 · Muhammad Maher (Helwan U., Cairo)🇪🇬 · Abdel Magied Diab (Egyptian Ctr. Theor. Phys., Cairo, WLCAPP, Cairo)🇪🇬 · Magda Abdel Wahab (Ain Shams U., Cairo)🇪🇬 · Eiman Abou El Dahab (MTI U., Cairo, Egyptian Ctr. Theor. Phys., Cairo)🇪🇬

    The strange-quark occupation factor (${\gamma }_s$) is determined from the statistical fit of the multiplicity ratio ${\mathrm{K}}^{+}/{\pi }^{+}$ in a wide range of nucleon-nucleon center-of-mass energies ($\sqrt{s_{NN}}$). From this single-strange-quark-subsystem, ${\gamma }_s(\sqrt{s_{NN}})$ was parametrized as a damped trigonometric functionality and successfully implemented to the hadron resonance gas model, at chemical semi-equilibrium. Various particle ratios including ${\mathrm{K}}^{-}/{\pi }^{-}$, $\mathrm{\Lambda }/{\pi }^{-}$, and $\bar{\mathrm{\Lambda }}/{\pi }^{-}$ are well reproduced. The phenomenology of ${\gamma }_s(\sqrt{s_{NN}})$ suggests that, the hadrons (${\gamma }_s$ raises) at $\sqrt{s_{NN}}\simeq 7$GeV seems to undergo a phase transition to a mixed phase (${\gamma }_s$ declines), which is then derived into partons (${\gamma }_s$ remains unchanged with increasing $\sqrt{s_{NN}}$), at $\sqrt{s_{NN}}\simeq 20$GeV.

    hep-phEPL(2016)·4 citations
18. 18*

    Curtailing the Dark Side in Non-Standard Neutrino Interactions

    Pilar Coloma🇺🇸 · Peter B. Denton🇩🇰 · M. C. Gonzalez-Garcia🇪🇸 · Michele Maltoni🇪🇸 · Thomas Schwetz🇩🇪

    In presence of non-standard neutrino interactions the neutrino flavor evolution equation is affected by a degeneracy which leads to the so-called LMA-Dark solution. It requires a solar mixing angle in the second octant and implies an ambiguity in the neutrino mass ordering. Non-oscillation experiments are required to break this degeneracy. We perform a combined analysis of data from oscillation experiments with the neutrino scattering experiments CHARM and NuTeV. We find that the degeneracy can be lifted if the non-standard neutrino interactions take place with down quarks, but it remains for up quarks. However, CHARM and NuTeV constraints apply only if the new interactions take place through mediators not much lighter than the electroweak scale. For light mediators we consider the possibility to resolve the degeneracy by using data from future coherent neutrino-nucleus scattering experiments. We find that, for an experiment using a stopped-pion neutrino source, the LMA-Dark degeneracy will either be resolved, or the presence of new interactions in the neutrino sector will be established with high significance.

    hep-phhep-exJHEP(2017)·146 citations
19. 19*

    Regular black holes from semi-classical down to Planckian size

    Euro Spallucci🇮🇹 · Anais Smailagic🇮🇹

    In this paper we review various models of curvature singularity free black holes. In the first part of the review we describe semi-classical solutions of the Einstein equations which, however, contains a "quantum" input through the matter source. We start by reviewing the early model by Bardeen where the metric is regularized by-hand through a short-distance cut-off, which is justified in terms of non-linear electro-dynamical effects. This a toy-model model useful to point-out the common features shared by all regular semi-classical black holes. Then, we solve Einstein equations with a Gaussian source encoding the quantum spread of an elementary particle. We identify, the a priori arbitrary, Gaussian width with the Compton wavelength of the quantum particle. This Compton-Gauss model leads to the estimate of a terminal density that a gravitationally collapsed object can achieve. We identify this density to be the Planck density, and reformulate the Gaussian model assuming this as its peak density. All these models, are physically reliable as long as the black hole mass is big enough with respect to the Planck mass. In the truly Planckian regime, the semi-classical approximation breaks down. In this case, a fully quantum black hole description is needed. In the last part of this paper, we propose a non-geometrical quantum model of Planckian black hole implementing the Holographic Principle and realizing the "classicalization" scenario recently introduced by Dvali and collaborators. The classical relation between the mass and radius of the black hole emerges only in the classical limit, far away from the Planck scale.

    ↳ hep-thgr-qchep-phInt.J.Mod.Phys.D(2017)·45 citations
20. 20*

    Casimir Energy in a Bounded Gross-Neveu model

    F. Escalante · J.C. Rojas

    In this letter we study some relevant physical parameters of the massless Gross-Neveu model in a finite spatial dimension for different boundary conditions. It is considered the standard homogeneous Hartree Fock solution using zeta function regularization for the study the mass dynamically generated and its respective beta function. It is found that the beta function does not depend on the Boundary conditions. On the other hand, it was considered the Casimir effect of the resulting effective theory. There appears a complex picture where the sign of the generated forces depends on the parameters used in the study.

    ↳ hep-thhep-phRev.Mex.Fis.(2018)·1 citation
21. 21*

    The gradient flow running coupling in SU(2) gauge theory with $N_f=8$ fundamental flavors

    Viljami Leino🇫🇮 · Jarno Rantaharju🇺🇸 · Teemu Rantalaiho🇫🇮 · Kari Rummukainen🇫🇮 · Joni M. Suorsa🇫🇮 · Kimmo Tuominen🇫🇮

    We study the evolution of the coupling in SU(2) gauge field theory with $N_f=8$ fundamental fermion flavors on the lattice. This model is expected to have an infrared fixed point at high coupling. We use HEX-smeared Wilson-clover action, and measure the gradient flow running coupling with Dirichlet boundary conditions. Extrapolating our results to continuum, we find an infrared fixed point at $g^2=8.24(59{)}_{-1.64}^{+0.97}$, with statistical and systematic error estimates. We also measure the anomalous dimension of the quark mass operator, and find its value at the fixed point $\gamma \approx 0.15\pm 0.02$.

    ↳ hep-lathep-phPRD(2017)·24 citations
22. 22*

    The phase structure of QCD

    Christian Schmidt🇩🇪 · Sayantan Sharma🇺🇸

    We review recent results on the phase structure of QCD and bulk QCD thermodynamics. In particular we discuss how universal critical scaling related to spontaneous breaking of the chiral symmetry manifests itself in recent lattice QCD simulations and how the knowledge on non-universal scaling parameter can be utilized in the exploration of the QCD phase diagram. We also show how various (generalized) susceptibilities can be employed to characterize properties of QCD matter at low and hight temperatures, related to deconfining aspects of the QCD transition. Finally, we address the input these lattice QCD calculation can provide for our under standing of the matter created in heavy ion collisions and in particular on the freeze-out conditions met in the hydrodynamic evolution of this matter.

    ↳ hep-lathep-phhep-thJ.Phys.G(2017)·68 citations
23. 23*

    Searching for the QCD Axion with Gravitational Microlensing

    Malcolm Fairbairn🇬🇧 · David J. E. Marsh🇬🇧 · Jérémie Quevillon🇬🇧

    The phase transition responsible for axion dark matter production can create large amplitude isocurvature perturbations which collapse into dense objects known as axion miniclusters. We use microlensing data from the EROS survey, and from recent observations with the Subaru Hyper Suprime Cam to place constraints on the minicluster scenario. We compute the microlensing event rate for miniclusters treating them as spatially extended objects with an extended mass function. Using the published bounds on the number of microlensing events we bound the fraction of DM collapsed into miniclusters, $f_{\mathrm{MC}}$. For an axion with temperature dependent mass consistent with the QCD axion we find $f_{\mathrm{MC}}<0.22(m_a/100\mu \text{eV}{)}^{-0.57}$, which represents the first observational constraint on the minicluster fraction. We forecast that a high-efficiency observation of ten nights with Subaru would be sufficient to constrain $f_{\mathrm{MC}}\lesssim 0.1$ over the entire QCD axion mass range. We make various approximations to derive these constraints and dedicated analyses by the observing teams of EROS and Subaru are necessary to confirm our results. If accurate theoretical predictions for $f_{\mathrm{MC}}$ can be made in future then microlensing can be used to exclude, or discover, the QCD axion. Further details of our computations are presented in a companion paper.

    ↳ astro-ph.COastro-ph.GAhep-phPRL(2017)·100 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.