Fri·Sep 18, 2015Friday·September 18, 2015

1. 01*

   Bounds on new physics from electric dipole moments

   Martin Jung🇩🇪

   Electric dipole moments are extremely sensitive probes for additional sources of CP violation in new physics models. The multi-scale problem of relating the high-precision measurements with neutrons, atoms and molecules to fundamental parameters can be approached model-independently to a large extent; however, care must be taken to include the uncertainties from especially nuclear and QCD calculations properly. The resulting bounds on fundamental parameters are illustrated in the context of Two-Higgs-Doublet models.

   hep-phPoS(2015)·1 citation
2. 02*

   Linear flavour violation and anomalies in B physics

   Ben Gripaios🇬🇧 · M. Nardecchia🇬🇧 · S. A. Renner🇬🇧

   We propose renormalizable models of new physics that can explain various anomalies observed in decays of B-mesons to electron and muon pairs. The new physics states couple to linear combinations of Standard Model fermions, yielding a pattern of flavour violation that gives a consistent fit to the gamut of flavour data. Accidental symmetries prevent contributions to baryon- and lepton-number-violating processes, as well as enforcing a loop suppression of new physics contributions to flavour violating processes. Data require that the new flavour-breaking couplings are largely aligned with the Yukawa couplings of the SM and so we also explore patterns of flavour symmetry breaking giving rise to this structure.

   hep-phJHEP(2016)·103 citations
3. 03*

   Stability of the electroweak ground state in the Standard Model and its extensions

   Luca Di Luzio🇮🇹 · Gino Isidori🇨🇭 · Giovanni Ridolfi🇮🇹

   We review the formalism by which the tunnelling probability of an unstable ground state can be computed in quantum field theory, with special reference to the Standard Model of electroweak interactions. We describe in some detail the approximations implicitly adopted in such calculation. Particular attention is devoted to the role of scale invariance, and to the different implications of scale-invariance violations due to quantum effects and possible new degrees of freedom. We show that new interactions characterized by a new energy scale, close to the Planck mass, do not invalidate the main conclusions about the stability of the Standard Model ground state derived in absence of such terms.

   hep-phhep-thPLB(2016)·66 citations
4. 04*

   MassToMI - a Mathematica package for an automatic Mass Insertion expansion

   Janusz Rosiek🇵🇱

   We present a Mathematica package designed to automatize the expansion of QFT transition amplitudes calculated in the mass eigenstates basis (i.e. expressed in terms of physical masses and mixing matrices) into series of "mass insertions", defined as off-diagonal entries of mass matrices in Lagrangian before diagonalization and identification of the physical states. The algorithm implemented in this package is based on the general "Flavor Expansion Theorem" proven in Ref.~\cite{FET}. The supplied routines are able to automatically analyze the structure of the amplitude, identify the parts which could be expanded and expand them to any required order. They are capable of dealing with amplitudes depending on both scalar or vector (Hermitian) and Dirac or Majorana fermion (complex) mass matrices. The package can be downloaded from the address www.fuw.edu.pl/masstomi.

   hep-phComput.Phys.Commun.(2016)·19 citations
5. 05*

   Weak decays of unstable $b$-mesons

   Benjamín Grinstein🇺🇸 · Jorge Martin Camalich🇺🇸

   We investigate the decays of the excited $(b\bar{q})$ mesons as probes of the short-distance structure of the weak $\Delta B=1$ transitions. These states are unstable under the electromagnetic or strong interactions although their widths are typically suppressed by phase space. As compared to the pseudoscalar $B$ meson, the purely leptonic decays of the vector $B^{\ast }$ are not chirally suppressed and are sensitive to different combinations of the underlying weak effective operators. An interesting example is $B_s^{\ast }\to {\ell }^{+}{\ell }^{-}$, which has a rate that can be accurately predicted in the standard model. The branching fraction is $\mathcal{B}\sim 10^{-11}$, irrespective of the lepton flavor and where the main uncertainty stems from the unmeasured and theoretically not-well known $B_s^{\ast }$ width. We discuss the prospects for producing this decay mode at the LHC and explore the possibility of measuring the $B_s^{\ast }\to \ell \ell$ amplitude, instead, through scattering experiments at the $B_s^{\ast }$ resonance peak. Finally we also discuss the charged-current $B_{u,c}^{\ast }\to \ell \nu$ decay which can provide complementary information on the $b\to u\ell \nu$ and $b\to c\ell \nu$ transitions.

   hep-phhep-exhep-latPRL(2016)·50 citations
6. 06*

   Spacetime curvature and the Higgs stability during and after inflation: Gravity to the rescue?

   Tommi Markkanen🇬🇧

   We investigate the stability of the electroweak vacuum during and after inflation by taking into account the effects of classical gravity in the quantum dynamics. In particular we show that the possible instability may be avoided without any beyond the Standard Model physics. Talk presented at the 27th Rencontres de Blois on Particle Physics and Cosmology.

   hep-phastro-ph.CO1 citation
7. 07*

   MSSM A-funnel and the Galactic Center Excess: Prospects for the LHC and Direct Detection Experiments

   Katherine Freese🇸🇪 · Alejandro Lopez🇺🇸 · Nausheen R. Shah🇺🇸 · Bibhushan Shakya🇺🇸

   The pseudoscalar resonance or "A-funnel" in the Minimal Supersymmetric Standard Model~(MSSM) is a widely studied framework for explaining dark matter that can yield interesting indirect detection and collider signals. The well-known Galactic Center excess (GCE) at GeV energies in the gamma ray spectrum, consistent with annihilation of a $\lesssim 40$ GeV dark matter particle, has more recently been shown to be compatible with significantly heavier masses following reanalysis of the background. In this paper, we explore the LHC and direct detection implications of interpreting the GCE in this extended mass window within the MSSM A-funnel framework. We find that compatibility with relic density, signal strength, collider constraints, and Higgs data can be simultaneously achieved with appropriate parameter choices. The compatible regions give very sharp predictions of 200-600 GeV CP-odd/even Higgs bosons at low tan$\beta$ at the LHC and spin-independent cross sections $\approx 10^{-11}$ pb at direct detection experiments. Regardless of consistency with the GCE, this study serves as a useful template of the strong correlations between indirect, direct, and LHC signatures of the MSSM A-funnel region.

   hep-phastro-ph.COhep-exJHEP(2016)·26 citations
8. 08*

   Quenching of inclusive and tagged b-jets at the LHC

   Hongxi Xing🇺🇸 · Jinrui Huang🇺🇸 · Zhong-Bo Kang🇺🇸 · Ivan Vitev🇺🇸

   We present theoretical predictions for the nuclear-induced attenuation of the differential cross sections for inclusive and tagged b-jet production in heavy ion collisions at the LHC. We find that for inclusive b-jet production at high transverse momentum the mass effects are negligible, and that the attenuation is comparable to the one observed for light jets. On the other hand, for isolated-photon and B-meson-tagged b-jets the sample of events with heavy quarks produced at the early stages of the collision is greatly enhanced. Thus, these tagged b-jet final-states have a much more direct connection to the physics of b-quark energy loss. We present theoretical predictions for the quenching of such tagged b-jet events at the LHC and the QGP-induced modification of the related momentum imbalance and asymmetry. We demonstrate that these tagged processes can be used to accurately study the physics of heavy quark production and propagation in dense QCD matter.

   hep-phnucl-thNucl.Part.Phys.Proc.(2016)·3 citations
9. 09*

   Midrapidity hyperon production in pp and pA collisions from low to LHC energies

   G.H. Arakelyan🇦🇲 · C. Merino🇪🇸 · Yu.M. Shabelski🇷🇺

   The experimental data on p, Lambda, Xi-, Omega-, baryons and the corresponding antibaryons spectra obtained by different collaborations are compared with the results of the calculations performed into the frame of the Quark-Gluon String Model. The contribution of String Junction diffusion and the inelastic screening corrections are accounted for in the theoretical calculations. The predictions of the Quark-Gluon String Model both for pp and pA collisions are extended up to the LHC energies.

   hep-phEPJA(2016)·18 citations
10. 10*

    Pion polarizabilities: Theory vs Experiment

    Mikhail A. Ivanov🇷🇺

    The values of charged pion polarizabilities obtained in the framework of chiral perturbation theory at the level of two-loop accuracy are compared with the experimental result recently reported by COMPASS Collaboration. It is found that the calculated value for the dipole polarizabilities $(\alpha -\beta {)}_{{\pi }^{\pm }}=(5.7\pm 1.0)\times 10^{-4}{\mathrm{fm}}^3$ fits quite well the experimental result $(\alpha -\beta {)}_{{\pi }^{\pm }}=(4.0\pm 1.2_{\mathrm{stat}}\pm 1.4_{\mathrm{syst}})\times 10^{-4}{\mathrm{fm}}^3$.

    hep-phhep-exInt.J.Mod.Phys.Conf.Ser.(2015)·2 citations
11. 11*

    Excitation function Analysis for Charmonium Production in Heavy-Ion Collisions

    Kai Zhou🇩🇪

    Both color screening and regeneration are hot medium effects on charmonium production in heavy ion collisions. While they affect in an opposite way the charmonium yield, their competition in transverse dynamics bring sensitivity to the ratio of averaged transverse momentum suqare for charmonium, which thus can reveal more nature of the QCD medium created from the collisions. We make an excitation analysis based on transport approach to illustrate such a picuture.

    hep-phnucl-thJ.Phys.Conf.Ser.(2016)·0 citations
12. 12*

    ${\alpha }_s$ from the updated ALEPH data for hadronic $\tau$ decays

    Diogo Boito🇧🇷 · Maarten Golterman🇺🇸 · Kim Maltman🇨🇦 · James Osborne🇺🇸 · Santiago Peris🇪🇸

    We extract the strong coupling ${\alpha }_s(m_{\tau }^2)$ from the recently updated ALEPH non-strange spectral functions obtained from hadronic $\tau$ decays. We apply a self-consistent analysis method, first tested in the analysis of OPAL data, to extract ${\alpha }_s(m_{\tau }^2)$ and non-perturbative contributions. The analysis yields ${\alpha }_s^{\mathrm{FO}}(m_{\tau }^2)=0.296\pm 0.010$, using Fixed Order Perturbation Theory (FOPT), and ${\alpha }_s^{\mathrm{CI}}(m_{\tau }^2)=0.310\pm 0.014$, using Contour Improved Perturbation Theory (CIPT). The weighted average of these results with those previously obtained from OPAL data give ${\alpha }_s^{\mathrm{FO}}(m_{\tau }^2)=0.303\pm 0.009$ and ${\alpha }_s^{\mathrm{CI}}(m_{\tau }^2)=0.319\pm 0.012$, which gives, after evolution to the $Z$ boson mass scale, ${\alpha }_s^{\mathrm{FO}}(m_Z^2)=0.1165\pm 0.0012$ and ${\alpha }_s^{\mathrm{CI}}(m_Z^2)=0.1185\pm 0.0015$, respectively. We observe that non-perturbative effects limit the accuracy with which ${\alpha }_s$ can be extracted from $\tau$ decay data.

    hep-phNucl.Part.Phys.Proc.(2016)·0 citations
13. 13*

    Update on two-zero textures of the Majorana neutrino mass matrix in light of recent T2K, Super-Kamiokande and NO$\nu$A results

    Shun Zhou🇨🇳

    The latest results from atmospheric and accelerator neutrino experiments indicate that the normal neutrino mass ordering $m_1^{}<m_2^{}<m_3^{}$, a maximal leptonic CP-violating phase $\delta =270^{\circ }$ and the second octant of neutrino mixing angle ${\theta }_{23}^{}>45^{\circ }$ are favored. In light of new experimental results, we update previous phenomenological studies on two-zero textures of the Majorana neutrino mass matrix $M_{\nu }^{}$, in the flavor basis where the charged-lepton mass matrix $M_l^{}$ is diagonal. When the $1\sigma$ ranges of neutrino mixing parameters are taken into account, only four (i.e., ${\mathbf{A}}_{1,2}^{}$ and ${\mathbf{B}}_{2,4}^{}$) among seven two-zero patterns of $M_{\nu }^{}$ show the aforementioned features of neutrino mass spectrum, mixing angle ${\theta }_{23}^{}$ and CP-violating phase $\delta$, and thus are compatible with the latest neutrino oscillation data. The correlative relations among neutrino masses and mixing parameters have been derived analytically for these four patterns, and the allowed regions of neutrino mixing angles and the CP-violating phase are also given. Possible realizations of four viable two-zero textures via non-Abelian discrete flavor symmetries are discussed.

    hep-phCPC(2016)·53 citations
14. 14*

    Proof of Factorization of $J/\Psi$ Production in Non-Equilibrium QCD at RHIC and LHC

    Gouranga C. Nayak🇺🇸

    $J/\psi$ suppression/production is one of the main signature of quark-gluon plasma detection at RHIC and LHC. In order to study $j/\psi$ suppression/production in high energy heavy-ion collisions at RHIC and LHC, one needs to prove the factorization theorem of $j/\psi$ production in non-equilibrium QCD medium, otherwise one will predict infinite cross section of $j/\psi$. In this paper we prove factorization theorem of $j/\psi$ production in non-equilibrium QCD at RHIC and LHC at all order in coupling constant.

    hep-phnucl-th1 citation
15. 15*

    Doublet-singlet model and unitarity

    G. Cynolter🇭🇺 · J. Kovacs🇭🇺 · E. Lendvai🇭🇺

    We study the renormalizable singlet-doublet fermionic extension of the Standard Model. In this model, the new vector-like fermions couple to the gauge bosons and to the Higgs via new Yukawa couplings, that allow for nontrivial mixing in the new sector, providing a stable, neutral dark matter candidate. Approximate analytic formulae are given for the mass spectrum around the blind spots, where the dark matter candidate coupling to $h$ or $Z$ vanishes. We calculate the two particle scattering amplitudes in the model, impose the perturbative unitarity constraints and establish bounds on the Yukawa couplings.

    hep-phgr-qcMod.Phys.Lett.A(2016)·30 citations
16. 16*

    Phenomenology of NMSSM in TeV scale mirage mediation

    Kei Hagimoto🇯🇵 · Tatsuo Kobayashi🇯🇵 · Hiroki Makino🇯🇵 · Ken-ichi Okumura🇯🇵 · Takashi Shimomura🇯🇵

    We study the next-to-minimal supersymmetric standard model (NMSSM) with the TeV scale mirage mediation, which is known as a solution for the little hierarchy problem in supersymmetry. Our previous study showed that 125 GeV Higgs boson is realized with O(10) % fine-tuning for 1.5 TeV gluino (1 TeV stop) mass. The $\mu$ term could be as large as 500 GeV without sacrificing the fine-tuning thanks to a cancellation mechanism. The singlet-doublet mixing is suppressed by $\tan \beta$. In this paper, we further extend this analysis. We argue that approximate scale symmetries play a role behind the suppression of the singlet-doublet mixing. They reduce the mixing matrix to a simple form that is useful to understand the results of the numerical analysis. We perform a comprehensive analysis of the fine-tuning including the singlet sector by introducing a simple formula for the fine-tuning measure. This shows that the singlet mass of the least fine-tuning is favored by the LEP anomaly for moderate $\tan \beta$. We also discuss prospects for the precision measurements of the Higgs couplings at LHC and ILC and direct/indirect dark matter searches in the model.

    hep-phhep-exJHEP(2016)·12 citations
17. 17*

    Dependence of elastic hadron collisions on impact parameter

    Jiri Prochazka🇨🇿 · Milos V. Lokajicek🇨🇿 · Vojtech Kundrat🇨🇿

    Elastic proton-proton collisions represent probably the greatest ensemble of available measured data, the analysis of which may provide large amount of new physical results concerning fundamental particles. It is, however, necessary to analyze first some conclusions concerning pp collisions and their interpretations differing fundamentally from our common macroscopic experience. It has been argued, e.g., that elastic hadron collisions have been more central than inelastic ones, even if any explanation of the existence of so different process, i.e., elastic and inelastic (with hundreds of secondary particles) collisions, under the same conditions has not been given until now. The given conclusion has been based on a greater number of simplifying mathematical assumptions (done already in earlier calculations), without their influence on physical interpretation being analyzed and entitled; the corresponding influence has started to be studied in the approach based on eikonal model. The possibility of peripheral interpretation of elastic collisions will be demonstrated and corresponding results summarized. The arguments will be given why no preference may be given to the mentioned centrality against the standard peripheral behaviour. The corresponding discussion of contemporary description of elastic hadronic collision in dependence on impact parameter will be summarized and the justification of some important assumptions will be considered.

    hep-phhep-thnucl-thEur.Phys.J.Plus(2016)·12 citations
18. 18*

    de Sitter vacuum from $R^2$ supergravity

    Fuminori Hasegawa🇯🇵 · Yusuke Yamada🇯🇵

    We propose a supergravity model with a constrained curvature multiplet, which realizes the Starobinsky inflation and the de Sitter vacuum in the present universe simultaneously. Surprisingly, at the vacuum, the soft supersymmetry breaking scale for minimal supersymmetric standard model sector becomes the TeV scale, however, the gravitino mass scale becomes much higher than that of soft supersymmetry breaking. Such a hierarchical structure, which naturally avoids the gravitino problem, appears without introducing a new scale other than inflation scale.

    ↳ hep-thhep-phPRD(2015)·20 citations
19. 19*

    Heavy quark jets at the LHC

    Mikko Voutilainen🇫🇮

    We summarize measurements of b and c jet production at the LHC, which are an important signature and background for decays of massive particles such as H-to-b-bbar. These include measurements of the inclusive and dijet production of heavy quark jets, b and c jets produced in association with vector bosons Z and W, and decays of boosted Z bosons into pairs of b-bbar. The current status of b tagging and b jet energy scale is also reviewed. These measurements test perturbative QCD in the four and five-flavor number schemes, and provide insight into the relative importance of heavy flavor production through flavor creation, flavor excitation and gluon splitting channels. The W+c measurement provides additionally a powerful way to probe the strange quark and antiquark sea in the proton. The recent studies looking separately at production of one and two b jets find generally good agreement with theory predictions for two b-jet production, while some discrepancies are observed for singly produced b jets, particularly at large b-jet pT , where gluon splitting becomes dominant.

    ↳ hep-exhep-phInt.J.Mod.Phys.A(2015)·13 citations
20. 20*

    Spontaneous symmetry breaking and Nambu-Goldstone modes in dissipative systems

    Yuki Minami🇯🇵 · Yoshimasa Hidaka🇯🇵

    We discuss spontaneous breaking of internal symmetry and its Nambu-Goldstone (NG) modes in dissipative systems. We find that there exist two types of NG modes in dissipative systems corresponding to type-A and type-B NG modes in Hamiltonian systems. To demonstrate the symmetry breaking, we consider a $O(N)$ scalar model obeying a Fokker-Planck equation. We show that the type-A NG modes in the dissipative system are diffusive modes, while they are propagating modes in Hamiltonian systems. We point out that this difference is caused by the existence of two types of Noether charges, $Q_R^{\alpha }$ and $Q_A^{\alpha }$: $Q_R^{\alpha }$ are symmetry generators of Hamiltonian systems, which are not conserved in dissipative systems. $Q_A^{\alpha }$ are symmetry generators of dissipative systems described by the Fokker-Planck equation, which are conserved. We find that the NG modes are propagating modes if $Q_R^{\alpha }$ are conserved, while those are diffusive modes if they are not conserved. We also consider a $SU(2)\times U(1)$ scalar model with a chemical potential to discuss the type-B NG modes. We show that the type-B NG modes have a different dispersion relation from those in the Hamiltonian systems.

    ↳ cond-mat.stat-mechhep-phPRE(2018)·43 citations
21. 21*

    Can Compactifications Solve the Cosmological Constant Problem?

    Mark P. Hertzberg🇺🇸 · Ali Masoumi🇺🇸

    Recently, there have been claims in the literature that the cosmological constant problem can be dynamically solved by specific compactifications of gravity from higher-dimensional toy models. These models have the novel feature that in the four-dimensional theory, the cosmological constant $\Lambda$ is much smaller than the Planck density and in fact accumulates at $\Lambda =0$. Here we show that while these are very interesting models, they do not properly address the real cosmological constant problem. As we explain, the real problem is not simply to obtain $\Lambda$ that is small in Planck units in a toy model, but to explain why $\Lambda$ is much smaller than other mass scales (and combinations of scales) in the theory. Instead, in these toy models, all other particle mass scales have been either removed or sent to zero, thus ignoring the real problem. To this end, we provide a general argument that the included moduli masses are generically of order Hubble, so sending them to zero trivially sends the cosmological constant to zero. We also show that the fundamental Planck mass is being sent to zero, and so the central problem is trivially avoided by removing high energy physics altogether. On the other hand, by including various large mass scales from particle physics with a high fundamental Planck mass, one is faced with a real problem, whose only known solution involves accidental cancellations in a landscape.

    ↳ hep-thastro-ph.COgr-qchep-phJCAP(2016)·7 citations
22. 22*

    Dark matter implications of the WMAP-Planck Haze

    Andrey E. Egorov🇺🇸 · Jennifer M. Gaskins🇺🇸 · Elena Pierpaoli🇺🇸 · Davide Pietrobon🇺🇸

    Gamma rays and microwave observations of the Galactic Center and surrounding areas indicate the presence of anomalous emission, whose origin remains ambiguous. The possibility of dark matter (DM) annihilation explaining both signals through prompt emission at gamma-rays and secondary emission at microwave frequencies from interactions of high-energy electrons produced in annihilation with the Galactic magnetic fields has attracted much interest in recent years. We investigate the DM interpretation of the Galactic Center gamma-ray excess by searching for the associated synchrotron in the WMAP-Planck data. Considering various magnetic field and cosmic-ray propagation models, we predict the synchrotron emission due to DM annihilation in our Galaxy, and compare it with the WMAP-Planck data at 23-70GHz. In addition to standard microwave foregrounds, we separately model the microwave counterpart to the Fermi Bubbles and the signal due to DM, and use component separation techniques to extract the signal associated with each template from the total emission. We confirm the presence of the Haze at the level of 7% of the total sky intensity at 23GHz in our chosen region of interest, with a harder spectrum $I\sim {\nu }^{-0.8}$ than the synchrotron from regular cosmic-ray electrons. The data do not show a strong preference towards fitting the Haze by either the Bubbles or DM emission only. Inclusion of both components provides a better fit with a DM contribution to the Haze emission of 20% at 23GHz, however, due to significant uncertainties in foreground modeling, we do not consider this a clear detection of a DM signal. We set robust upper limits on the annihilation cross section by ignoring foregrounds, and also report best-fit DM annihilation parameters obtained from a complete template analysis. We conclude that the WMAP-Planck data are consistent with a DM interpretation of the gamma-ray excess.

    ↳ astro-ph.COastro-ph.GAastro-ph.HEhep-phJCAP(2016)·15 citations
23. 23*

    Dark matter as a cancer hazard

    Olga Chashchina🇫🇷 · Zurab Silagadze🇷🇺

    We comment on the paper "Dark Matter collisions with the Human Body" by K. Freese and C. Savage (Phys. Lett. B 717, 25 (2012) [arXiv:1204.1339]) and describe a dark matter model for which the results of the previous paper do not quite apply. Within this mirror dark matter model, potentially hazardous objects, mirror micrometeorites, can exist and may lead to diseases triggered by multiple mutations, such as cancer, though with very low probability.

    ↳ astro-ph.COhep-phPLB(2016)·0 citations
24. 24*

    Quantum Yang-Mills field theory

    Marco Frasca🇮🇹

    We show that the Dyson-Schwinger set of equations for the Yang-Mills theory can be exactly solved till the two-point function. This is obtained given a set of nonlinear waves solving the classical equations of motion. Translation invariance is maintained by the proper choice of the solution of the equation for the two-point function as devised by Coleman. The computation of the Dyson-Schwinger equations is performed in the same way as devised by Bender, Milton and Savage providing a set of partial differential equations whose proof of existence of the solutions is standard. So, the correlation functions of the theory could be proved to exist and the two-point function manifests a mass gap.

    ↳ math-phhep-phhep-thmath.MPEur.Phys.J.Plus(2017)·49 citations
25. 25*

    Production of antimatter ${}^{5,6}$Li nuclei in central Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV

    Kai-Jia Sun🇨🇳 · Lie-Wen Chen🇨🇳

    Combining the covariant coalescence model and a blast-wave-like analytical parametrization for (anti-)nucleon phase-space freezeout configuration, we explore light (anti-)nucleus production in central Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV. Using the nucleon freezeout configuration (denoted by FO1) determined from the measured spectra of protons (p), deutrons (d) and ${}^3$He, we find the predicted yield of ${}^4$He is significantly smaller than the experimental data. We show this disagreement can be removed by using a nucleon freezeout configuration (denoted by FO2) in which the nucleons are assumed to freeze out earlier than those in FO1 to effectively consider the effect of large binding energy value of ${}^4$He. Assuming the binding energy effect also exists for the production of ${}^5\text{Li}$, ${}^5\overline{\text{Li}}$, ${}^6\text{Li}$ and ${}^6\overline{\text{Li}}$ due to their similar binding energy values as ${}^4$He, we find the yields of these heavier (anti-)nuclei can be enhanced by a factor of about one order, implying that although the stable (anti-)${}^6$Li nucleus is unlikely to be observed, the unstable (anti-)${}^5$Li nucleus could be produced in observable abundance in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV where it may be identified through the p-${}^4\text{He}$ ($\overline{\text{p}}$-${}^4\overline{\text{He}}$) invariant mass spectrum. The future experimental measurement on (anti-)${}^5\text{Li}$ would be very useful to understand the production mechanism of heavier antimatter.

    ↳ nucl-thastro-ph.COhep-phnucl-exPLB(2015)·40 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.