Wed·Aug 10, 2016Wednesday·August 10, 2016

1. 01*

   $P$-wave coupled channel effects in electron-positron annihilation

   Meng-Lin Du🇩🇪 · Ulf-G. Meißner🇩🇪 · Qian Wang🇩🇪

   $P$-wave coupled channel effects arising from the $D\bar{D}$, $D{\bar{D}}^{\ast }+c.c.$, and $D^{\ast }{\bar{D}}^{\ast }$ thresholds in $e^{+}{e}^{-}$ annihilations are systematically studied. We provide an exploratory study by solving the Lippmann-Schwinger equation with short-ranged contact potentials obtained in the heavy quark limit. These contact potentials can be extracted from the $P$-wave interactions in the $e^{+}{e}^{-}$ annihilations, and then be employed to investigate possible isosinglet $P$-wave hadronic molecules. In particular, such an investigation may provide information about exotic candidates with quantum numbers $J^{PC}=1^{-+}$. In the mass region of the $D\bar{D}$, $D{\bar{D}}^{\ast }+c.c.$, and $D^{\ast }{\bar{D}}^{\ast }$ thresholds, there are two quark model bare states, i.e. the $\psi (3770)$ and $\psi (4040)$, which are assigned as $(1^3{D}_1)$ and $(3^1{S}_1)$ states, respectively. By an overall fit of the cross sections of $e^{+}{e}^{-}\to D\bar{D}$, $D{\bar{D}}^{\ast }+c.c.$, $D^{\ast }{\bar{D}}^{\ast }$, we determine the physical coupling constants to each channel and extract the pole positions of the $\psi (3770)$ and $\psi (4040)$. The deviation of the ratios from that in the heavy quark spin symmetry (HQSS) limit reflects the HQSS breaking effect due to the mass splitting between the $D$ and the $D^{\ast }$. Besides the two poles, we also find a pole a few MeV above the $D{\bar{D}}^{\ast }+c.c.$ threshold which can be related to the so-called $G(3900)$ observed earlier by BABAR and Belle. This scenario can be further scrutinized by measuring the angular distribution in the $D^{\ast }{\bar{D}}^{\ast }$ channel with high luminosity experiments.

   hep-phPRD(2016)·30 citations
2. 02*

   Towards the (Mexican) discovery of second class currents at Belle-II

   Pablo Roig🇲🇽

   Within the SM, the yet unmeasured ${\tau }^{-}\to {\pi }^{-}{\eta }^{(\prime )}{\nu }_{\tau }$ decays are predicted as a suppressed, isospin-violating effect with branching ratios $\lesssim \mathcal{O}(10^{-5})$. However, they can also proceed through other mechanisms (such as charged Higgs exchange) at comparable rates. This has motivated several studies of the corresponding QCD predictions for these second class current processes. In this contribution we discuss the prospects for the discovery of these decays at Belle-II emphasizing the Mexican involvement in this project. Our branching ratio prediction $\sim 1.7\cdot 10^{-5}$ (decay channel with an $\eta$ meson) is well within the reach of Belle-II. The branching fraction for the decay channel with an ${\eta }^{\prime }$ meson is expected to be between one and two orders of magnitude more suppressed.

   hep-phhep-exJ.Phys.Conf.Ser.(2016)·1 citation
3. 03*

   Gravity wave and model-independent axion

   Jihn E. Kim🇰🇷

   In this short comment, we notice that the model-independent axion contribution to the graviton mass at just outside the Schwarzschild radius is completely negligible in GW150914. The model-independent axion contribution to the graviton mass at the order $10^{-22}$eV might be possible for merger of black holes of mass of order $2\times 10^{14}$kg.

   hep-phastro-ph.COhep-thJ.Korean Phys.Soc.(2017)·6 citations
4. 04*

   On gravitational and thermal corrections to vacuum decay

   Alberto Salvio🇨🇭 · Alessandro Strumia🇨🇭 · Nikolaos Tetradis🇬🇷 · Alfredo Urbano🇨🇭

   We reconsider gravitational corrections to vacuum decay, confirming and simplifying earlier results and extending them by allowing for a non-minimal coupling of the Higgs to gravity. We find that leading-order gravitational corrections suppress the vacuum decay rate. Furthermore, we compute minor corrections to thermal vacuum decay in the SM by adding one-loop contributions to the Higgs kinetic term, two-loop contributions to the Higgs potential and allowing for time-dependent bounces.

   hep-phhep-thJHEP(2016)·93 citations
5. 05*

   Constraints on new physics from radiative $B$ decays

   Ayan Paul🇮🇹 · David M. Straub🇩🇪

   A new phase for the measurements of radiative decay modes in $b\to s$ transitions has started with new measurements of exclusive modes by LHCb and with Belle-II showing distinctive promises in both inclusive and exclusive channels. After critically reviewing the hadronic uncertainties in exclusive radiative decays, we analyze the impact of recent measurements of the branching ratio and mass-eigenstate rate asymmetry in $B_s\to \varphi \gamma$ and of the angular distribution of $B\to K^{\ast }{e}^{+}{e}^{-}$ at low $q^2$ on new physics in the $b\to s\gamma$ transition.

   hep-phhep-exJHEP(2017)·119 citations
6. 06*

   Current status of MSSM Higgs sector with LHC 13 TeV data

   Rahool Kumar Barman🇮🇳 · Biplob Bhattacherjee🇮🇳 · Arghya Choudhury🇬🇧 · Debtosh Chowdhury🇮🇹 · Jayita Lahiri🇮🇳 · Shamayita Ray🇮🇳

   ATLAS and CMS collaborations have reported the results on the Higgs search analyzing $\sim 36$ fb${}^{-1}$ data from Run-II of LHC at 13 TeV. In this work, we study the Higgs sector of the phenomenological Minimal Supersymmetric Standard Model, in light of the recent Higgs data, by studying separately the impact of Run-I and Run-II data. One of the major impacts of the new data on the parameter space comes from the direct searches of neutral CP-even and CP-odd heavy Higgses ($H$ and $A$, respectively) in the $H/A\to {\tau }^{+}{\tau }^{-}$ channel which disfavours high $\tan \beta$ regions more efficiently than Run-I data. Secondly, we show that the latest result of the rare radiative decay of $B$ meson imposes a slightly stronger constraint on low $\tan \beta$ and low $M_A$ region of the parameter space, as compared to its previous measurement. Further, we find that in a global fit Run-II light Higgs signal strength data is almost comparable in strength with the corresponding Run-I data. Finally, we discuss scenarios with the Heavy Higgs boson decaying into electroweakinos and third generation squarks and sleptons.

   hep-phhep-exEur.Phys.J.Plus(2019)·22 citations
7. 07*

   Transverse-momentum-dependent gluon distributions from JIMWLK evolution

   C. Marquet🇫🇷 · E. Petreska🇫🇷 · C. Roiesnel🇫🇷

   Transverse-momentum-dependent (TMD) gluon distributions have different operator definitions, depending on the process under consideration. We study that aspect of TMD factorization in the small-x limit, for the various unpolarized TMD gluon distributions encountered in the literature. To do this, we consider di-jet production in hadronic collisions, since this process allows to be exhaustive with respect to the possible operator definitions, and is suitable to be investigated at small x. Indeed, for forward and nearly back-to-back jets, one can apply both the TMD factorization and Color Glass Condensate (CGC) approaches to compute the di-jet cross-section, and compare the results. Doing so, we show that both descriptions coincide, and we show how to express the various TMD gluon distributions in terms of CGC correlators of Wilson lines, while keeping Nc finite. We then proceed to evaluate them by solving the JIMWLK equation numerically. We obtain that at large transverse momentum, the process dependence essentially disappears, while at small transverse momentum, non-linear saturation effects impact the various TMD gluon distributions in very different ways. We notice the presence of a geometric scaling regime for all the TMD gluon distributions studied: the "dipole" one, the Weizsäcker-Williams one, and the six others involved in forward di-jet production.

   hep-phJHEP(2016)·95 citations
8. 08*

   Analytic three-loop static potential

   Roman N. Lee🇷🇺 · Alexander V. Smirnov🇷🇺 · Vladimir A. Smirnov🇷🇺 · Matthias Steinhauser🇩🇪

   We present analytic results for the three-loop static potential of two heavy quarks. The analytic calculation of the missing ingredients is outlined and results for the singlet and octet potential are provided.

   hep-phPRD(2016)·56 citations
9. 09*

   Evaluating the last missing ingredient for the three-loop quark static potential by differential equations

   Roman N. Lee🇷🇺 · Vladimir A. Smirnov🇷🇺

   We analytically evaluate the three-loop Feynman integral which was the last missing ingredient for the analytical evaluation of the three-loop quark static potential. To evaluate the integral we introduce an auxiliary parameter $y$, which corresponds to the residual energy in some of the HQET propagators. We construct a differential system for 109 master integrals depending on $y$ and fix boundary conditions from the asymptotic behaviour in the limit $y\to \infty$. The original integral is recovered from the limit $y\to 0$. To solve these linear differential equations we try to find an $ϵ$-form of the differential system. Though this step appears to be, strictly speaking, not possible, we succeed to find an $ϵ$-form of all irreducible diagonal blocks, which is sufficient for solving the differential system in terms of an $ϵ$ expansion. We find a solution up to weight six in terms of multiple polylogarithms and obtain an analytical result for the required three-loop Feynman integral by taking the limit $y\to 0$. As a by-product, we obtain analytical results for some Feynman integrals typical for HQET.

   hep-phJHEP(2016)·17 citations
10. 10*

    Potential for optimizing Higgs boson CP measurement in H to tau tau decay at LHC and ML techniques

    R. Józefowicz · E. Richter-Was🇵🇱 · Z. Was🇵🇱

    We investigate potential for measuring CP state of the Higgs boson in the H to tau tau$ decay with consecutive tau-lepton decays in channels: tau^+- to rho^+- nu_tau and tau^+- to a1^+- nu_tau combined. Subsequent decays rho^+- to pi^+- pi^0, a1^+- to rho^0 pi^+- and rho^0 to pi^+ pi^- are taken into account. We will explore extensions of the method, where acoplanarity angle for the planes build on the visible decay products, pi^+- pi^0 of tau^+- to pi^pm pi^0 nu_tau, was used. The angle is sensitive to transverse spin correlations, thus to parity. We show, that in the case of the cascade decays of tau to a1 nu, information on the CP state of Higgs can be extracted from the acoplanarity angles as well. Because in the cascade decay a1^+- to rho^0 pi^pm,rho^0 to pi^+ pi^- up to four planes can be defined, up to 16 distinct acoplanarity angles are available for H \to tau tau to a1^+ a1^- nu nu decays. These acoplanarities carry in part supplementary but also correlated information. It is thus cumbersome to evaluate an overall sensitivity. We investigate sensitivity potential of such analysis, by developing and implementing model in the Machine Learning (ML) techniques. We quantify possible improvements when multi-dimensional phase-space of outgoing decay products directions is used, instead of 1-dimensional projections i.e. the acoplanarity angles. We do not take into account ambiguities resulting from detector uncertainties or background contamination, we concentrate on usefulness of ML methods and tau to 3pi nu decays for Higgs boson parity measurement.

    hep-phhep-exPRD(2016)·31 citations
11. 11*

    The Inelastic Frontier: Discovering Dark Matter at High Recoil Energy

    Joseph Bramante🇺🇸 · Patrick J. Fox🇺🇸 · Graham D. Kribs🇺🇸 · Adam Martin🇺🇸

    There exist well motivated models of particle dark matter which predominantly scatter inelastically off nuclei in direct detection experiments. This inelastic transition causes the DM to up-scatter in terrestrial experiments into an excited state up to 550 keV heavier than the DM itself. An inelastic transition of this size is highly suppressed by both kinematics and nuclear form factors. We extend previous studies of inelastic DM to determine the present bounds on the scattering cross section, and the prospects for improvements in sensitivity. Three scenarios provide illustrative examples: nearly pure Higgsino DM; magnetic inelastic DM; and inelastic models with dark photon exchange. We determine the elastic scattering rate as well as verify that exothermic transitions are negligible. Presently, the strongest bounds on the cross section are from xenon at LUX-PandaX (\delta < 160 keV), iodine at PICO (160 < \delta < 300 keV), and tungsten at CRESST (when \delta > 300 keV). Amusingly, once \delta > 200 keV, weak scale (and larger) DM - nucleon scattering cross sections are allowed. The relative competitiveness of these experiments is governed by the upper bound on the recoil energies employed by each experiment, as well as strong sensitivity to the mass of the heaviest element in the detector. Several implications, including sizable recoil energy-dependent annual modulation, and improvements for future experiments are discussed. We show that the xenon experiments can improve on the PICO results, if they were to analyze their existing data over a larger range of recoil energies, i.e., 20-500 keV. We also speculate about several reported events at CRESST between 45-100 keV, that could be interpreted as inelastic DM scattering. Future data from PICO, CRESST and xenon experiments can test this with anaylses of high energy recoil data.

    hep-phhep-exPRD(2016)·127 citations
12. 12*

    The weak mixing angle from low energy neutrino measurements: a global update

    B. C. Canas🇲🇽 · E. A. Garces🇲🇽 · O. G. Miranda🇲🇽 · M. Tortola🇪🇸 · J. W. F. Valle🇪🇸

    Taking into account recent theoretical and experimental inputs on reactor fluxes we reconsider the determination of the weak mixing angle from low energy experiments. We perform a global analysis to all available neutrino-electron scattering data from reactor antineutrino experiments, obtaining sin^2(theta_W) = 0.252 \pm 0.030. We discuss the impact of the new theoretical prediction for the neutrino spectrum, the new measurement of the reactor antineutrino spectrum by the Daya Bay collaboration, as well as the effect of radiative corrections. We also reanalyze the measurements of the nu_e-e cross section at accelerator experiments including radiative corrections. By combining reactor and accelerator data we obtain an improved determination for the weak mixing angle, sin^2(theta_W) = 0.254 \pm 0.024.

    hep-phhep-exPLB(2016)·25 citations
13. 13*

    A Colored KNT Neutrino Model

    Takaaki Nomura🇰🇷 · Hiroshi Okada🇹🇼 · Nobuchika Okada🇺🇸

    We propose a radiative seesaw model at the three-loop level, in which quarks, leptons, leptoquark bosons, and a Majorana fermion of dark matter candidate are involved in the neutrino loop. Analyzing neutrino oscillation data including all possible constraints such as flavor changing neutral currents, lepton flavor violations, upper/lower bound on the mass of leptoquark from the collider physics, and the measured relic density of the dark matter, we show the allowed region to satisfy all the data/constraints.

    hep-phPLB(2016)·31 citations
14. 14*

    Gauge see-saw: A mechanism for a light gauge boson

    Hye-Sung Lee🇰🇷 · Min-Seok Seo🇰🇷

    There has been rapidly growing interest in the past decade in a new gauge boson which is considerably lighter than the standard model Z boson. A well-known example of this kind is the so-called dark photon, and it is actively searched for in various experiments nowadays. It would be puzzling to have a new gauge boson which is neither massless nor electroweak scale, but possesses a rather small yet nonzero mass. We present a mechanism that can provide a light gauge boson as a result of a mass matrix diagonalization.

    hep-phPLB(2017)·5 citations
15. 15*

    Generators for the SIS/DIS region

    Christophe Bronner🇯🇵

    We describe how the main neutrino interaction generators (GENIE, NEUT and NuWro) used by current neutrino oscillation experiments treat the shallow and deep inelastic region. We then compare their predictions for charged current events in this region, in terms of transferred momentum as well as multiplicities for different types of hadrons. We present additional comparisons in the low hadronic invariant mass region, where the generators use different custom models.

    hep-phhep-exJPS Conf.Proc.(2016)·9 citations
16. 16*

    Nucleon Transversity and Hyperon Polarization

    Dae Sung Hwang🇰🇷

    We calculate the transverse polarizations of the produced hyperons in the semi-inclusive deep inelastic scattering of unpolarized lepton beam on transversely polarized nucleon, since these polarizations provide a potential method for extracting the transversity distribution h1(x) of the nucleon. In this calculation we use the SU(6) wavefunctions of the octet baryons and the spectator model for the distribution functions of nucleons and the fragmentation functions of hyperons. We find that that H1(z) of the Sigma hyperons are much larger than that of the Lambda hyperon. Therefore, when one tries to extract the transversity distribution h1(x) from the hyperon polarizations, measuring the polarizations of the Sigma hyperons is more efficient than Lambda.

    hep-ph5 citations
17. 17*

    Momentum Fractions carried by quarks and gluons in models of proton structure functions at small $x$

    D K Choudhury🇮🇳 · Baishali Saikia🇮🇳 · K Kalita🇮🇳

    The paper reports analysis of momentum fractions carried by quarks and gluons in models of Proton structure functions at small $x$. First, we analyze the model proposed by Lastovicka based on self-similarity sometime back. We then make a similar analysis for a second model based on the same notion which is also free from singularity in $x$ : $0<x<1$. The predictions of both the models are then compared with a recent QCD based Froissart bound compatible model of proton structure function at small $x$, suggested by Block, Durand, Ha and McKay. The results are then compared with the corresponding study in perturbative and Lattice QCD.

    hep-phInt.J.Mod.Phys.A(2017)·7 citations
18. 18*

    Analysis of Charmless Two-body B decays in Factorization Assisted Topological Amplitude Approach

    Si-Hong Zhou🇨🇳 · Qi-An Zhang🇨🇳 · Wei-Ran Lyu🇨🇳 · Cai-Dian Lü🇨🇳

    We analyze charmless two-body non-leptonic B decays $B\to PP,PV$ under the framework of factorization assisted topological amplitude approach, where $P(V)$ denotes a light pseudoscalar (vector) meson. Compared with the conventional flavor diagram approach, we consider flavor $SU(3)$ breaking effect assisted by factorization hypothesis for topological diagram amplitudes of different decay modes, factorizing out the corresponding decay constants and form factors. The non-perturbative parameters of topology diagram magnitudes $\chi$ and strong phase $\varphi$ are universal that can be extracted by ${\chi }^2$ fit from current abundant experimental data of charmless B decays. The number of free parameters and the ${\chi }^2$ per degree of freedom are both reduced comparing with previous analysis. With these best fitted parameters, we predict branching fractions and $CP$ asymmetry parameters of nearly 100 $B_{u,d}$ and $B_s$ decay modes. The long-standing $\pi \pi$ and $\pi K$-$CP$ puzzles are resolved simultaneoulsy.

    hep-phEPJC(2017)·66 citations
19. 19*

    Baryogenesis of the Universe in cSMCS Model plus Iso-Doublet Vector Quark

    Neda Darvishi🇵🇱

    CP violation of the SM is insufficient to explain the baryon asymmetry in the universe and therefore an additional source of CP violation is needed. Here the extension of the SM by a neutral complex scalar singlet with a nonzero vacuum expectation value (cSMCS) plus a heavy vector quark pair is considered. This model offers the spontaneous CP violation and proper description in the baryogenesis, it leads strong enough first-order electro-weak phase transition to suppress the baryon-violating sphaleron process.

    hep-phJHEP(2016)·12 citations
20. 20*

    CPT-Violating, Massive Photons and Cherenkov Radiation

    Don Colladay🇺🇸

    CPT-Violating photons are well-known to have problems with energy positivity in certain cases and therefore have not been convincingly quantized to date. We find that by adding a small mass term, consistent with experimental bounds, the theory can be regulated and allows for a consistent covariant quantization procedure. This new framework is applied to a consistent quantum calculation of vacuum Cherenkov radiation rates. These rates turn out to be largely independent of the mass of the photon regulator used. In the physical regime, accessible by ultra high energy cosmic rays, the behavior of the rate is proportional to the square of the CPT-violating parameter and is not realistically observable.

    hep-ph2 citations
21. 21*

    Transversly Polarized Proton-Proton Collisions and the Collins Fragmentation Function

    Leonard S. Kisslinger🇺🇸 · Ming X. Liu🇺🇸 · Patrick McGaughey🇺🇸

    The Sivers Function is briefly reviewed and the Collins Fragmentation Function to produce a hadron from a polarized quark is defined. We estimate ${\pi }^{+},{\pi }^{-}$ +X production, where X represents particles which are not detected, via proton collisions with a polarized proton target using the Collins Fragmentation Function derived using the gluon distribution functions for polarized p-p collisions at E=$\sqrt{s}$=200 GeV.

    hep-ph1 citation
22. 22*

    Substructure of fuzzy dark matter haloes

    Xiaolong Du🇩🇪 · Christoph Behrens🇩🇪 · Jens C. Niemeyer🇩🇪

    We derive the halo mass function (HMF) for fuzzy dark matter (FDM) by solving the excursion set problem explicitly with a mass-dependent barrier function, which has not been done before. We find that compared to the naive approach of the Sheth--Tormen HMF for FDM, our approach has a higher cut off mass and the cut off mass changes less strongly with redshifts. Using merger trees constructed with a modified version of the Lacey & Cole formalism that accounts for suppressed small scale power and the scale-dependent growth of FDM haloes and the semi-analytic GALACTICUS code, we study the statistics of halo substructure including the effects from dynamical friction and tidal stripping. We find that if the dark matter is a mixture of cold dark matter (CDM) and FDM, there will be a suppression on the halo substructure on small scales which may be able to solve the Missing Satellites Problem faced by the pure CDM model. The suppression becomes stronger with increasing FDM fraction or decreasing FDM mass. Thus, it may be used to constrain the FDM model.

    ↳ astro-ph.COastro-ph.GAgr-qchep-phMNRAS(2017)·104 citations
23. 23*

    Searching for photon-sector Lorentz violation using gravitational-wave detectors

    Alan Kostelecky🇺🇸 · Adrian C. Melissinos🇺🇸 · Matthew Mewes🇺🇸

    We study the prospects for using interferometers in gravitational-wave detectors as tools to search for photon-sector violations of Lorentz symmetry. Existing interferometers are shown to be exquisitely sensitive to tiny changes in the effective refractive index of light occurring at frequencies around and below the microhertz range, including at the harmonics of the frequencies of the Earth's sidereal rotation and annual revolution relevant for tests of Lorentz symmetry. We use preliminary data obtained by the Laser Interferometer Gravitational-Wave Observatory (LIGO) in 2006-2007 to place constraints on coefficients for Lorentz violation in the photon sector exceeding current limits by about four orders of magnitude.

    ↳ gr-qchep-phPLB(2016)·87 citations
24. 24*

    Modeling Mergers of Known Galactic Systems of Binary Neutron Stars

    Alessandra Feo🇮🇹 · Roberto De Pietri🇮🇹 · Francesco Maione🇮🇹 · Frank Löffler🇺🇸

    We present a study of the merger of six different known galactic systems of binary neutron stars (BNS) of unequal mass with a mass ratio between $0.75$ and $0.99$. Specifically, these systems are J1756-2251, J0737-3039A, J1906+0746, B1534+12, J0453+1559 and B1913+16. We follow the dynamics of the merger from the late stage of the inspiral process up to $\sim$ 20 ms after the system has merged, either to form a hyper-massive neutron star (NS) or a rotating black hole (BH), using a semi-realistic equation of state (EOS), namely the seven-segment piece-wise polytropic SLy with a thermal component. For the most extreme of these systems ($q=0.75$, J0453+1559), we also investigate the effects of different EOSs: APR4, H4, and MS1. Our numerical simulations are performed using only publicly available open source code such as, the Einstein Toolkit code deployed for the dynamical evolution and the LORENE code for the generation of the initial models. We show results on the gravitational wave signals, spectrogram and frequencies of the BNS after the merger and the BH properties in the two cases in which the system collapse within the simulated time.

    ↳ gr-qcastro-ph.HEhep-phClass.Quant.Grav.(2017)·25 citations
25. 25*

    Spectra and rates of bremsstrahlung neutrino emission in stars

    Gang Guo🇨🇳 · Yong-Zhong Qian🇺🇸

    We calculate the energy-differential rate for neutrino emission from electron-nucleus bremsstrahlung in stellar interiors taking into account the effects of electron screening and ionic correlations. We compare the energy-differential and the net rates, as well as the average ${\bar{\nu }}_e$ and ${\bar{\nu }}_x$ $(x=\mu ,\tau )$ energies, for this process with those for $e^{\pm }$ pair annihilation, plasmon decay, and photo-neutrino emission over a wide range of temperature and density. We also compare our updated energy loss rates for the above thermal neutrino emission processes with the fitting formulas widely used in stellar evolution models and determine the temperature and density domain in which each process dominates. We discuss the implications of our results for detection of ${\bar{\nu }}_e$ from massive stars during their pre-supernova evolution and find that pair annihilation makes the predominant contribution to the signal from the thermal emission processes.

    ↳ astro-ph.SRhep-phnucl-thPRD(2016)·16 citations
26. 26*

    Event-shape-engineering study of charge separation in heavy-ion collisions

    Fufang Wen🇺🇸 · Jacob Bryon🇺🇸 · Liwen Wen🇺🇸 · Gang Wang🇺🇸

    Recent measurements of charge-dependent azimuthal correlations in high-energy heavy-ion collisions have indicated charge-separation signals perpendicular to the reaction plane, and have been related to the chiral magnetic effect (CME). However, the correlation signal is contaminated with the background caused by the collective motion (flow) of the collision system, and an effective approach is needed to remove the flow background from the correlation. We present a method study with simplified Monte Carlo simulations and a multi-phase transport model, and develop a scheme to reveal the true CME signal via the event-shape engineering with the flow vector of the particles of interest.

    ↳ nucl-thhep-phCPC(2018)·41 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.