Wed·Feb 13, 2019Wednesday·February 13, 2019

1. 01*

   Calculation of the non-perturbative strong coupling from first principles

   Fabio Siringo🇮🇹

   The success of the screened massive expansion is investigated in the framework of a screened momentum-subtraction scheme for the running of the strong coupling in pure Yang-Mills theory. By the exact Slavnov-Taylor and Nielsen identities, a very predictive and self-contained set of stationary conditions are derived for the optimization of the fixed-coupling expansion, yielding explicit analytical one-loop expressions for the propagators, the coupling and the beta function, from first principles. An excellent agreement is found with the lattice data. In the proposed screened renormalization scheme, a monotonic running coupling emerges which saturates in the IR at the finite IR stable fixed point $g=9.40$ where the beta function crosses the zero. A simple analytical expression is derived for the leading behavior of the beta in the IR.

   hep-phhep-lathep-thPRD(2019)·22 citations
2. 02*

   Searching in CMS Open Data for Dimuon Resonances with Substantial Transverse Momentum

   Cari Cesarotti🇺🇸 · Yotam Soreq🇨🇭 · Matthew J. Strassler🇺🇸 · Jesse Thaler🇺🇸 · Wei Xue🇨🇭

   We study dimuon events in 2.11/fb of 7 TeV pp collisions, using CMS Open Data, and search for a narrow dimuon resonance with moderate mass (14-66 GeV) and substantial transverse momentum (pT). Applying dimuon pT cuts of 25 GeV and 60 GeV, we explore two overlapping samples: one with isolated muons, and one with prompt muons without an isolation requirement. Using the latter sample requires information about detector effects and QCD backgrounds, which we obtain directly from the CMS Open Data. We present model-independent limits on the product of cross section, branching fraction, acceptance, and efficiencies. These limits are stronger, relative to a corresponding inclusive search without a pT cut, by factors of as much as nine. Our "pT-enhanced" dimuon search strategy provides improved sensitivity to models in which a new particle is produced mainly in the decay of something heavier, as could occur, for example, in decays of the Higgs boson or of a TeV-scale top partner. An implementation of this method with the current 13 TeV data should improve the sensitivity to such signals further by roughly an order of magnitude.

   hep-phhep-exPRD(2019)·22 citations
3. 03*

   Hadron tomography in meson-pair production and gravitational form factors

   S. Kumano🇯🇵 · Qin-Tao Song🇯🇵 · O. V. Teryaev🇷🇺

   Generalized parton distributions (GPDs) are 3-dimensional (3D) structure functions for hadrons, and they are important for solving the proton spin puzzle including partonic orbital-angular-momentum contributions. The $s$-$t$ crossed quantities of the GPDs are generalized distribution amplitudes (GDAs). Here, $s$ and $t$ are Mandelstam variables. The GDAs can be studied in two-photon processes (${\gamma }^{\ast }\gamma \to h\bar{h}$) at KEKB. A GDA describes the amplitude from quark and antiquark to the hadron pair $h\bar{h}$. In 2016, the Belle collaboration reported measurements for pion-pair production in electron-positron collision, and the pion GDAs were determined in this work by analyzing the Belle data. In our analysis, the pion GDAs are expressed by a few parameters, which are determined by analyzing the Belle data. From the obtained GDAs, form factors of energy-momentum tenor, so called gravitational form factors, are calculated for pion in the timelike region. The spacelike gravitational form factors are calculated from the timelike ones by using the dispersion relation. Then, the mass radius is calculated as 0.32-0.39 fm and the mechanical radius, defined by the slope of the form factor ${\Theta }_1$, is calculated as 0.82-0.88 fm for the pion by using the spacelike form factors. This is the first study on gravitational form factors and radii of hadrons from actual experimental measurements. In 2019, the Belle II collaboration will start collecting data by the higher luminosity Super KEKB, so that the GDAs of other hadrons should also be investigated in the near future. Our studies are valuable in understanding 3D structure and gravitational properties of hadrons.

   hep-phhep-exhep-latnucl-thPoS(2019)·2 citations
4. 04*

   Multi-Component Dark Matter in a Non-Abelian Dark Sector

   Fatemeh Elahi🇮🇷 · Sara Khatibi🇮🇷

   In this paper, we explore a dark sector scenario with a gauged $SU(2{)}_R$ and a global $U(1{)}_X\times {\mathbb{Z}}_2$, where the continuous symmetries are spontaneously broken to a global $U(1{)}_D$. We show that in various regions of the parameter space we can have two, or three dark matter candidates, where these dark matter particles are either a Dirac fermion, a dark gauge boson, or a complex scalar. The phenomenological implications of this scenario are vast and interesting. We identify the parameter space that is still viable after taking into account the constraints from various experiments. We, also, discuss how this scenario can explain the recent observation by DAMPE in the electron-positron spectrum. Furthermore, we comment on the neutrino mass generation through non-renormalizable interactions between the standard model and the dark sector.

   hep-phPRD(2019)·44 citations
5. 05*

   Hierarchy and decoupling

   Matěj Hudec🇨🇿 · Michal Malinský🇨🇿

   A large hierarchy between the electroweak scale and virtually any new scale of beyond-Standard-Model physics is often claimed to be unnatural. Sometimes, the apparent disparity between the measured Higgs mass and the size of the typical loop corrections encountered within such schemes is even interpretted as a profound indication that one should expect a remedy just behind the corner, probably in form of a new physics such as low-scale supersymmetry, new strong dynamics etc. In reality, all such potentially large corrections in the one- and two-point Green's functions cancel with each other in the physical Higgs mass $m_H$ which eventually turns out to be driven only by the electroweak VEV $v$. This, naively, may look like a miracle, the more that the standard perturbative approach often makes it irresistible to discuss the magnitudes of those corrections as if, individually, they were physically relevant. To shed some more light on this conundrum we advocate a method based on the symmetry properties of the Coleman-Weinberg effective potential which not only makes it very clear why $m_H\propto v$ to all orders in the perturbative expansion but, at the same time, it does not require any inspection of the explicit form of the tadpole equations whatsoever. Besides simplifying the calculations considerably it makes the "internal composition" of the VEV in terms of the high-scale parameters essentially irrelevant. We exemplify these findings on an extended series of specific simplified models in which the role of the heavy dynamics is played by all "reasonable" types of fields (barring gravity), i.e., by a heavy scalar, a heavy (Majorana) fermion and a heavy vector, respectively. We show that the dependence of $m_H$ on the heavy scale follows the expectation based on dynamical arguments such as the decoupling theorem.

   hep-phJ.Phys.G(2020)·3 citations
6. 06*

   Transformation properties of the transverse mass under transverse Lorentz boosts at hadron colliders

   Daniel R. Tovey🇬🇧

   The transverse mass of semi-invisibly decaying particles, calculated from the transverse momenta of their decay products, has been used in a broad range of searches and measurements at hadron colliders, such as the LHC. This variable is invariant by construction under Lorentz boosts purely in the longitudinal (beam) direction, thereby minimising sensitivity to fluctuations in the fractions of the proton momentum carried by the colliding partons. In this paper we examine, by contrast, the properties of the transverse mass under boosts with a component also in the transverse plane perpendicular to the beam direction. We show that this variable is invariant under such boosts in cases where the boost is purely transverse and (a) the momenta of the decay products are confined to the transverse plane in the rest frame of the parent particle and/or (b) the transverse momenta of the decay products are perpendicular to the boost direction. We discuss the transformation properties of the transverse mass in the case of combined transverse and longitudinal boosts and identify the criteria under which the transverse mass in the laboratory frame can equal the rest mass of the parent particle, irrespective of its value in the rest frame of the parent.

   hep-phEPJC(2019)·2 citations
7. 07*

   The Higgs boson decays with the lepton flavor violation

   O.M.Boyarkin🇧🇾 · G.G.Boyarkina🇧🇾 · D.S.Vasileuskaya🇧🇾

   Within the left-right symmetric model (LRM) the decays $$S_1\to {\mu }^{+}+{\tau }^{-},S_1\to {\mu }^{-}+{\tau }^{+}$$ where $S_1$ is an analog of the standard model Higgs boson, are considered. The widths of this decays are found in the third order of the perturbation theory. Since the main contribution to the decay widths is caused by the diagram with the light and heavy neutrinos in the virtual state then investigation of this decays could shed light upon the neutrino sector structure. The obtained decay widths critically depend on the charged gauge bosons mixing angle $\xi$ and the heavy-light neutrinos mixing angle $\phi$. The LRM predicts the values of these angles as functions of the vacuum expectation values $v_L$ and $v_R$. Using the results of the existing experiments, on looking for the additional charged gauge boson $W_2$ and on measuring the electroweak $\rho$ parameter, gives $$\sin \xi \le 5\times 10^{-4},\sin \phi \le 2.3\times 10^{-2}.$$ However, even using the upper bounds on $\sin \xi$ and $\sin \phi$ one does not manage to get the upper experimental bound on the branching ratio $\text{mbox}BR(S_1\to \tau \mu {)}_{exp}$ being equal to $0.25\times 10^{-2}$. The theoretical expression proves to be on two orders of magnitude less than $\text{mbox}BR(S_1\to \tau \mu {)}_{exp}$.

   hep-phInt.J.Mod.Phys.A(2018)·3 citations
8. 08*

   Non-eikonal corrections to multi-particle production in the Color Glass Condensate

   Pedro Agostini🇪🇸 · Tolga Altinoluk🇵🇱 · Néstor Armesto🇪🇸

   We consider the non-eikonal corrections to particle production in the Color Glass Condensate stemming from the relaxation of the shockwave approximation for the target that acquires a finite longitudinal dimension. We derive a modified expression of the Lipatov vertex which takes into account this finite target width. This expression is employed to compute single, double and triple gluon production in the Glasma graph limit valid for the scattering of two dilute objects, at all orders in the expansion in the number of colors. We justify and generalize previous results, and discuss the possible implications on two particle correlations of these non-eikonal corrections that induce differences between the away- and near-side peaks.

   hep-phnucl-thEPJC(2019)·57 citations
9. 09*

   Inclusive hadron-jet production at the LHC

   Andrèe Dafne Bolognino🇮🇹 · Francesco Giovanni Celiberto🇮🇹 · Dmitry Yu. Ivanov🇷🇺 · Mohammed M.A. Mohammed🇮🇹 · Alessandro Papa🇮🇹

   We suggest the inclusive detection at the LHC of a light charged hadron and of a jet widely separated in rapidity as a new probe channel for the study of the BFKL resummation. Predictions for cross section and azimuthal correlations, shaped on the CMS and CASTOR acceptances, are presented.

   hep-phActa Phys.Polon.Supp.(2019)·61 citations
10. 10*

    Leptoproduction of $\rho$-mesons as discriminator for the unintegrated gluon distribution in the proton

    Andrèe Dafne Bolognino🇮🇹 · Francesco Giovanni Celiberto🇮🇹 · Dmitry Yu. Ivanov🇷🇺 · Alessandro Papa🇮🇹

    The gluon content of the proton, in the high-energy regime, is embodied by the unintegrated gluon distribution (UGD), which describes the gluon emission probability, with a given longitudinal momentum fraction and transverse momentum. The UGD, formulated within the $\kappa$-factorization approach, has universal validity and several models for it have been proposed so far. We will show that the polarized $\rho$-meson leptoproduction at HERA is a not trivial testfield for discriminating among existing models of UGD.

    hep-phActa Phys.Polon.Supp.(2019)·63 citations
11. 11*

    Probing baryon asymmetry of the Universe at LHC and SHiP

    Iryna Boiarska🇩🇰 · Kyrylo Bondarenko🇳🇱 · Alexey Boyarsky🇳🇱 · Shintaro Eijima🇳🇱 · Maksym Ovchynnikov🇳🇱 · Oleg Ruchayskiy🇩🇰 · Inar Timiryasov🇨🇭

    The origin of the baryon asymmetry of the Universe (BAU) is one of the major puzzles beyond the Standard Model. Detecting the particles responsible for the generation of the BAU would enormously boost our understanding of physics of the early Universe. Here we demonstrate that searches for displaced vertices at ATLAS, CMS and LHCb allow detecting heavy neutral leptons (HNL) with parameters that can simultaneously lead to the successful generation of the BAU and explain the masses and oscillations of active neutrinos. The combination of a dedicated LHC search program and a complementary Intensity Frontier experiment (such as SHiP) will allow exploring a sizeable part of the "minimal HNL baryogenesis" parameter space.

    hep-phhep-ex34 citations
12. 12*

    Higgs potential near-criticality from a de Sitter swampland-like condition

    Jae-hyeon Park🇰🇷

    Motivated by the recently proposed de Sitter swampland conjecture, a formally same condition imposed instead on the convex and real exact effective potential is contemplated. Compared to the original conjecture, the modified condition admits a broader class of low-energy effective theories such as those with local maxima and/or false de Sitter vacua with some restrictions, as long as there is an anti-de Sitter vacuum. The observed accelerating expansion of the universe might therefore be attributed to a quintessence or a metastable vacuum. The former solution can be simplified and thus better compatible with phenomenological constraints thanks to the convexity of the effective potential. Among the latter class of solutions is found the enthralling possibility that the modified condition is in fact behind the experimentally favoured metastability of the Higgs potential with an instability scale below or around the Planck scale.

    hep-phhep-thPRD(2019)·3 citations
13. 13*

    An Estimate of the Inclusive Branching Ratio to ${\bar{B}}_c$ in ${\Xi }_{bbq}$ Decay

    Alexander K. Ridgway🇺🇸 · Mark B. Wise🇺🇸

    We estimate the branching ratio for the inclusive decays ${\Xi }_{bbq}\to {\bar{B}}_c^{(\ast )}+X_{c,s,q}$ to be approximately 1%. Our estimate is performed using non-relativistic potential quark model methods that are appropriate if the bottom and charm quarks are heavy compared to the strong interaction scale. Here the superscript $(\ast )$ denotes that we are summing over spin zero ${\bar{B}}_c$ and spin one ${\bar{B}}_c^{\ast }$ mesons and the subscript $q$ denotes a light quark. Our approach treats the two bottom quarks in the baryon ${\Xi }_{bbq}$ as a small color anti-triplet. This estimate for the inclusive branching ratio to ${\bar{B}}_c$ and ${\bar{B}}_c^{\ast }$ mesons also holds for decays of the lowest lying $T_{bb\bar{q}\bar{q}}$ tetraquark states, provided they are stable against strong and electromagnetic decay.

    hep-phPLB(2019)·8 citations
14. 14*

    Neutrino Masses and Mixing: A Little History for a Lot of Fun

    M.C. Gonzalez-Garcia🇪🇸

    In this talk I present my personal summary of the progress on the determination of the masses of the neutrinos and of the leptonic flavour mixing from the combined analysis of the experimental results.

    hep-ph5 citations
15. 15*

    A Dark Matter Interpretation of the ANITA Anomalous Events

    Lucien Heurtier🇺🇸 · Yann Mambrini🇫🇷 · Mathias Pierre🇫🇷

    The ANITA collaboration recently reported the detection of two anomalous upward-propagating extensive air showers exiting the Earth with relatively large emergence angles and energies in the range $\mathcal{O}(0.5-1)\mathrm{EeV}$. We interpret these two events as coming from the decay of a massive dark-matter candidate ($m_{\text{DM}}\gtrsim 10^9\mathrm{GeV}$) decaying into a pair of right-handed neutrinos. While propagating through the Earth, these extremely boosted decay products convert eventually to $\tau$-leptons which loose energy during their propagation and produce showers in the atmosphere detectable by ANITA at emergence angles larger than what Standard-Model neutrinos could ever produce. We performed Monte Carlo simulations to estimate the propagation and energy loss effects and derived differential effective areas and number of events for the ANITA and the IceCube detectors. Interestingly, the expected number of events for IceCube is of the very same order of magnitude than the number of events observed by ANITA but at larger emergence angles, and energies $\lesssim 0.1\mathrm{EeV}$. Such features match perfectly with the presence of the two upward-going events IceCube-140109 and IceCube-121205 that have been exhibited from a recent re-analysis of IceCube data samples.

    hep-phastro-ph.HEhep-exPRD(2019)·58 citations
16. 16*

    Neutrinoless Double-Beta Decay: Status and Prospects

    Michelle J. Dolinski🇺🇸 · Alan W. P. Poon🇺🇸 · Werner Rodejohann🇩🇪

    Neutrinoless double-beta decay is a forbidden, lepton-number-violating nuclear transition whose observation would have fundamental implications for neutrino physics, theories beyond the Standard Model and cosmology. In this review, we summarize the theoretical progress to understand this process, the expectations and implications under various particle physics models, as well as the nuclear physics challenges that affect the precise predictions of the decay half-life. We will also provide a synopsis of the current and future large-scale experiments that aim at discovering this process in physically well-motivated half-life ranges.

    ↳ nucl-exhep-exhep-phnucl-thAnn.Rev.Nucl.Part.Sci.(2019)·677 citations
17. 17*

    Symmetries of Neutrino Physics

    A.B. Balantekin🇺🇸

    In this contribution to the proceedings of a conference honoring the career of Francesco Iachello, two applications of symmetry principles to neutrino physics are described. These applications are the connection between fermion pairing in many-body physics and the neutrino mass as well as collective neutrino oscillations

    ↳ nucl-thhep-phAIP Conf.Proc.(2019)·0 citations
18. 18*

    Hadronic-vacuum-polarization contribution to the muon's anomalous magnetic moment from four-flavor lattice QCD

    C. T. H. Davies🇬🇧 · C. DeTar🇺🇸 · A. X. El-Khadra🇺🇸 · E. Gamiz🇪🇸 · Steven Gottlieb🇺🇸 · D. Hatton🇬🇧 · A. S. Kronfeld🇺🇸 · J. Laiho🇺🇸 · G. P. Lepage🇺🇸 · Yuzhi Liu🇺🇸 · P. B. Mackenzie🇺🇸 · C. McNeile🇬🇧 and 6 other authors

    We calculate the contribution to the muon anomalous magnetic moment hadronic vacuum polarization from {the} connected diagrams of up and down quarks, omitting electromagnetism. We employ QCD gauge-field configurations with dynamical $u$, $d$, $s$, and $c$ quarks and the physical pion mass, and analyze five ensembles with lattice spacings ranging from $a\approx 0.06$ to~0.15~fm. The up- and down-quark masses in our simulations have equal masses $m_l$. We obtain, in this world where all pions have the mass of the ${\pi }^0$, $10^{10}{a}_{\mu }^{ll}(conn.)=637.8(8.8)$, in agreement with independent lattice-QCD calculations. We then combine this value with published lattice-QCD results for the connected contributions from strange, charm, and bottom quarks, and an estimate of the uncertainty due to the fact that our calculation does not include strong-isospin breaking, electromagnetism, or contributions from quark-disconnected diagrams. Our final result for the total $\mathcal{O}({\alpha }^2)$ hadronic vacuum polarization to the muon's anomalous magnetic moment is~$10^{10}{a}_{\mu }^{\mathrm{HVP},\mathrm{LO}}=699(15{)}_{u,d}(1{)}_{s,c,b}$, where the errors are from the light-quark and heavy-quark contributions, respectively. Our result agrees with both {\it ab-initio} lattice-QCD calculations and phenomenological determinations from experimental $e^{+}{e}^{-}$-scattering data. It is $1.3\sigma$ below the "no new physics" value of the hadronic-vacuum-polarization contribution inferred from combining the BNL E821 measurement of $a_{\mu }$ with theoretical calculations of the other contributions.

    ↳ hep-lathep-phPRD(2020)·192 citations
19. 19*

    Effective long distance $q\bar{q}$ potential in holographic RG flows

    Jorge Casalderrey-Solana🇪🇸 · Diego Gutiez🇪🇸 · Carlos Hoyos🇪🇸

    We study the $q\bar{q}$ potential in strongly coupled non-conformal field theories with a non-trivial renormalization group flow via holography. We focus on the properties of this potential at an inter-quark separation $L$ large compared to the characteristic scale of the field theory. These are determined by the leading order IR physics plus a series of corrections, sensitive to the properties of the RG-flow. To determine those corrections, we propose a general method applying holographic Wilsonian renormalization to a dual string. We apply this method to examine in detail two sets of examples, $3+1$-dimensional theories with an RG flow ending in an IR fixed point; and theories that are confining in the IR, in particular, the Witten QCD and Klebanov-Strassler models. In both cases, we find corrections with a universal dependence on the inter-quark separation. When there is an IR fixed point, that correction decays as a power $\sim 1/L^4$. We explain that dependence in terms of a double-trace deformation in a one-dimensional defect theory. For a confining theory, the decay is exponential $\sim e^{-ML}$, with $M$ a scale of the order of the glueball mass. We interpret this correction using an effective flux tube description as produced by a background internal mode excitation induced by sources localized at the endpoints of the flux tube. We discuss how these results could be confronted with lattice QCD data to test whether the description of confinement via the gauge/gravity is qualitatively correct.

    ↳ hep-thhep-lathep-phJHEP(2019)·6 citations
20. 20*

    Wavefunctions on $S^2$ with flux and branes

    Sosuke Imai🇯🇵 · Yoshiyuki Tatsuta🇩🇪

    We formulate a six dimensional $U(1)$ gauge theory compactified on a (two dimensional) sphere $S^2$ with flux and localized brane sources. Profiles of the lowest Kaluza-Klein (KK) wavefunctions and their masses are derived analytically. In contrast to ordinary sphere compactifications, the above setup can lead to the degeneracy of and the sharp localizations of the linearly independent lowest KK modes, depending on the number of branes and their tensions. Moreover, it can naturally accommodate CP violation in Yukawa interactions.

    ↳ hep-thhep-phJHEP(2019)·2 citations
21. 21*

    Understanding and constraining the PDF uncertainties in a W boson mass measurement with forward muons at the LHC

    Stephen Farry🇬🇧 · Olli Lupton🇬🇧 · Martina Pili🇬🇧 · Mika Vesterinen🇬🇧

    Precision electroweak tests are a powerful probe of physics beyond the Standard Model, but the sensitivity is limited by the precision with which the $W$ boson mass ($M_W$) has been measured. The Parton Distribution Function (PDF) uncertainties are a potential limitation for measurements of $M_W$ with LHC data. It has recently been pointed out that, thanks to LHCb's unique forward rapidity acceptance, a new measurement of $M_W$ by LHCb can improve this situation. Here we report on a detailed study on the mechanism driving the PDF uncertainty in the LHCb measurement of $M_W$, and propose an approach which should reduce this uncertainty by roughly a factor of two using LHCb Run 2 data.

    ↳ hep-exhep-phEPJC(2019)·18 citations
22. 22*

    Towards Schwinger production of magnetic monopoles in heavy-ion collisions

    Oliver Gould🇫🇮 · David L.-J. Ho🇬🇧 · Arttu Rajantie🇬🇧

    Magnetic monopoles may be produced by the Schwinger effect in the strong magnetic fields of peripheral heavy-ion collisions. We review the form of the electromagnetic fields in such collisions and calculate from first principles the cross section for monopole pair production. Using the worldline instanton method, we work to all orders in the magnetic charge, and hence are not hampered by the breakdown of perturbation theory. Our result depends on the spacetime inhomogeneity through a single dimensionless parameter, the Keldysh parameter, which is independent of collision energy for a given monopole mass. For realistic heavy-ion collisions, the computational cost of the calculation becomes prohibitive and the finite size of the monopoles needs to be taken into account, and therefore our current results are not applicable to them. Nonetheless, our results show that the spacetime dependence enhances the production cross section and would therefore lead to stronger monopole mass bounds than in the constant-field case.

    ↳ hep-thhep-phPRD(2019)·69 citations
23. 23*

    Mirror magnetic field and its impact on dark matter distribution in galaxies

    Ekaterina Kryukova🇷🇺

    We obtain the value of the mirror magnetic field during different stages of cosmological evolution. We consider the magnetic field generation in the radiation-dominated era and the post-recombination epoch. We also estimate its galactic low-scale value in the process of dynamo amplification. We discuss a possible effect of the mirror magnetic field on the mirror matter distribution in a galaxy. The model can be generalized by assuming the existence of kinetic mixing between ordinary and mirror particles.

    ↳ astro-ph.COastro-ph.GAhep-phJ.Exp.Theor.Phys.(2019)·0 citations
24. 24*

    Pion family in AdS/QCD: the next generation from configurational entropy

    Luiz F. Ferreira🇧🇷 · R. da Rocha🇧🇷

    The two flavour AdS/QCD, with chiral and gluon condensates, sets in the description of the pion family and its mass spectra. Using gravity-dilaton-gluon backgrounds, entropic Regge-like trajectories for the pion family are then derived. They relate the $\pi$ mesons underlying configurational entropy to both the pions excitation wave mode number and the pions experimental mass spectra, yielding a reliable prediction for the mass spectra of higher excitation pion modes, to be experimentally detected.

    ↳ hep-thhep-phPRD(2019)·40 citations
25. 25*

    Light Nuclei from Lattice QCD: Spectrum, Structure and Reactions

    Zohreh Davoudi🇺🇸

    Lattice Quantum Chromodynamics (LQCD) studies of light nuclei have entered an era when first results on structure and reaction properties of light nuclei have emerged in recent years, complementing existing results on their lowest-lying spectra. Although in these preliminary studies the quark masses are still set to larger than the physical values, a few results at the physical point can still be deduced from simple extrapolations in the quark masses. The progress paves the road towards obtaining several important quantities in nuclear physics, such as nuclear forces and nuclear matrix elements relevant for pp fusion, single and double-beta decay processes, neutrino-nucleus scattering, searches for CP violation, nuclear response in direct dark-matter detection experiments, as well as gluonic structure of nuclei for an Electron-Ion Collider (EIC) program. Some of the recent developments, the results obtained, and the outlook of the field will be briefly reviewed in this talk, with a focus on results obtained by the Nuclear Physics From LQCD (NPLQCD) collaboration.

    ↳ hep-lathep-phnucl-thSpringer Proc.Phys.(2020)·2 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.