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## PHOTON 2019  –  International Conference on the Structure and the Interactions of the Photon, including the 23rd International Workshop on Photon-Photon Collisions and the International Workshop on High Energy Photon Colliders

Overview This conference is part of the series initiated in 1973 in Paris, as an International Colloquium on Photon-Photon Collisions at Electron-Positron Storage Rings. The latest Photon conferences took place in CERN-Geneva (2017), Novosibirsk (2015), Paris (2013), Spa (2011), Hamburg (2009), Paris (2007), Warsaw (2005), Frascati (2003), Ascona (2001), Freiburg (2000), Ambleside (1999), and Egmond aan Zee (1997). The scientific program will include topics related to photon-photon and photon-hadron collisions as well as final-state photon production at current and future colliders. In addition, high-energy astrophysics gamma-rays, and photon-related searches of new physics (axions, dark/hidden photons, …) will also be discussed. The conference format consists of talks in plenary sessions only. The LOC offers a number of young researcher grants to attend the conference. Interested participants are invited to send an e-mail to photon19_loc@lists.lnf.infn.it with their motivated request for support. The 2019 Edition of the Colloquium will be hosted in the first established laboratory of the Italian National Institute of Nuclear Physics (awarded also as EPS historical site) the place where in 1959, exactly 60 years ago, the first Italian Electro-Syncroton started its operations. Here, the year after, the first matter-antimatter collider (AdA) ever built saw the light.

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## Spin-azimuthal asymmetries in SIDIS: from JLab12 to EIC

The study of the 3D nucleon structure by probing the transverse momentum dependent (TMD) distributions of partons in Semi-Inclusive DIS is widely accepted as one of the main goals of the future Electron Ion Collider (EIC). Much wider kinematical coverage, and in particular higher $P_T$ and $Q^2$, would allow validating and extending studies of evolution properties of TMDs planned at JLab12, and access the sea and gluon distributions. The EIC would allow much better separation of current fragmentation and target fragmentation regions than JLab12, and due to high polarization of electrons and protons is a natural choice for measurements of different spin dependent observables in a full range of accessible kinematics. EIC provides also a unique possibility for detection of hadrons produced in the target fragmentation region, providing a new avenue for studies of the non-perturbative structure of the nucleon in correlations of hadrons produced in DIS regime. In this talk, we present an overview of the current status and some future measurements of the orbital structure of nucleons and nuclei at JLab and EIC.

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## Nanoscience and Nanotechnology

The NEXT Nanotechnology group at INFN – LNF organizes since 2000 a series of international meetings in the area of nanotechnology. The conference in 2018 is devoted to recent developments in nanoscience and its manifold technological applications. It consists of a number of tutorial/keynote lectures, as well as research talks presenting frontier nanoscience research developments and innovative nanotechnologies in the areas of biology, medicine, aerospace, optoelectronics, energy, materials and characterizations, low-dimensional nanostructures and devices. We plan to submit selected papers, based on conference talks and related discussions, for publication on a dedicated issue of a MDPI journal (to be specified later). There will be Invited Lecturers and selected talks from the call for papers below, as well as a poster session. CALL FOR CONTRIBUTIONS Authors wishing to submit their work for presentation at the conference can send an abstract as a doc or pdf file (max. 3 pages) to bellucci@lnf.infn.it by 5th December 2018, specifying whether it is meant for oral or poster presentation. Authors will be notified of the acceptance of their submission by 7th September 2014. LOC: S. Bellucci (Chair), S. Bistarelli, O. Calamai, A. Cataldo, F. Micciulla, M. Regi IAC: G. Bussetti (Polytechnic University of Milan, Italy), P. Kuzhir (Belarus State University, Minsk, Belarus), I. Iavicoli (University of Neaples, Italy) J. Macutkevic (Vilnius University, Lithuania) A. Maffucci (University of Cassino, Italy) S. Maksimenko (Belarus State University, Minsk, Belarus), D. Mencarelli (Polytechnic University of Marche, Italy) M. Modreanu (Tyndall Micronano Electronics, University College Cork, Ireland) M. Meyyappan (Ames ...

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## DAFNE-TF Workshop 2018

ICFA Mini-Workshop on   DAFNE as Open Accelerator Test Facility in year 2020 The workshop will take place on December 17th, 2018 at the Touschek Auditorium, Frascati Laboratory of INFN, Italy. The workshop is intended to discuss the interest from scientists to access the DAFNE e+ e- complex, which will conclude its physics program as collider in 2020. An infrastructure almost unique, that could open as Test Facility (DAFNE-TF) to the international community for studies of accelerator technologies and beam physics, for small experiments, and to be used as a test bed for enterprises active in the sector of components for accelerators.  Invitation Letter of Prof. Lenny Rivkin, Chair of the International Scientific Committee  INFN-18-10-LNF – “Proposal for a possible use of DAFNE as an open infrastructure (DAFNE-TF) for the study of physics and innovative technologies for accelerators” Call for Contributions:  Registrants are invited to submit ideas and contributions for scientific activities that could be carried out using DAFNE-TF characteristics at best, by filling the online form ( Deadline: November 30, 2018). Scientific Committee L. Rivkin (EPFL and PSI, chair), C. Bloise (INFN-LNF), Y. Cai (SLAC), A. Ghigo (INFN-LNF), M. Giovannozzi (CERN), C. Milardi (INFN-LNF), N. Pastrone (INFN-Torino), A. Variola (INFN-LNF) Organizing Committee O. R. Blanco Garcia (INFN-LNF), A. De Santis (INFN-LNF), A. Drago (INFN-LNF, chair) Secretariat D. Ferrucci (INFN-LNF), M. Luciani (INFN-LNF) dafne-tfw2018@lists.lnf.infn.it   Webmaster: S. Reda

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## Neutrino Lines from Dark Matter

While photon lines – or monochromatic photons-are known to arise in many dark matter models, neutrino lines are not so common. In this talk, I will discuss simple dark matter models, whose main indirect detection signature is the production of monochromatic neutrinos. Such features play an important role in indirect dark matter searches because they can be better discriminated against the astrophysical background. In the first part of my talk, I will discuss decaying dark matter. In particular, I will focus on singlet majorons, which naturally produce neutrino lines. Then, in the second part,I will briefly describe the properties that simple models must have in order to produce, in the near future,an observable flux of neutrino lines from dark matter annihilations. In both parts, I will discuss the implications for neutrino telescopes and the interplay with other indirect detection channels.

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## Fermilab: Muon g-2 and other news.

After 50 years of operation, Fermilab is still going strong. I will discuss the motivation, status, and prospects of the FNAL g-2 experiment. I’ll place it in historical context, especially regarding Fermilab’s future programs. I will end with a brief explanation of Fermilab’s “smallest” experiment, the Holometer, which measures effect of Planck-scale physics.

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## γγ scattering and non-BFKL contribution to Pomeron

Abstract: Pomeron is a term introduced in the 1960’s in the frame- work of the phenomenological Regge theory. It describes the behavior of total cross-sections of any hadronic reaction at extremely large values of the invariant energy s. In the QCD context, the best-known contribution to the Pomeron comes from the BFKL equation This approach resums Leading Logarithmic (LL) contributions i.e. single-logarithmic (SL) contributions, ∼ (αs ln s)n, multiplied by the overall factor s. The high-energy asymptotics of this resummation is known as the BFKL Pomeron. It predicts the total cross-section of hadronic reactions (and the γγ-scattering in particular) to behave, asymptotically, as ∼ s∆, where the exponent ∆ is called the intercept of the BFKL Pomeron. In contrast, we calculate amplitude ADL of elastic γγ-scattering in the Double-Logarithmic approximation (DLA), accounting for contributions ∼ (αs ln2 s)n. They are not accompanied by the overall factor s, so asymptotics of ADL is ∼ s(∆DL−1) which looks negligibly small compared to the BFKL result. By this reason the DL contribution to Pomeron was offhandedly ignored by theoretical HEP society and full attention was focused on the BFKL Pomeron only. However, we demonstrate that the intercept ∆DL proves to be so large that its value compensates for the lack of the extra factor of s and makes the DL Pomeron of comparable importance to the BFKL Pomeron. It means that DL Pomeron should participate in theoretical analysis of all HEP results where the BFKL Pomeron has been involved.

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## Terahertz Driven Electron and X-ray Sources

Today, high brightness and highly relativistic electron beams are generated by circular or linear accelerators (LINAC) typically operating with 1-3 GHz accelerating frequencies and approaches towards X-band frequencies in the 10 GHz range are maturing. The achievable accelerating gradients are limited by field emission from cavity walls or pulsed heating to several tens of MV/m in the case of low frequencies and up to 100 MV/m in the case of X- band frequencies. Moving up in frequency to the THz range, here hundreds of GHz, experimentally confirmed scaling laws predict the realization of few-hundred MV/m to 1 GV/m accelerating fields in LINACs and guns, respectively. The high field strength and field gradients enable direct generation of single femtosecond electron bunches with substantial charge in the pC-range from very compact devices. We will discuss highly efficient laser based THz generation by optical rectification and first results towards THz based electron guns, LINACs and beam manipulations with the final goal to construct a hard-X-ray source producing attosecond pulses.

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## LNF e le tecnologie per lo SPAZIO: Laboratori di test e calibrazione

L’INFN e i Laboratori Nazionali di Frascati portano avanti una intensa attività di ricerca tecnologica i cui prodotti, oltre che nella ricerca fondamentale, trovano applicazione in diversi campi di interesse sia sociale che industriale. In questo ciclo di seminari, dedicati ognuno a tecnologie e infrastrutture di interesse per un determinato settore, i LNF vogliono continuare il dialogo aperto con altri Enti, Università, Istituzioni ed Imprese in occasione dell’Open Day Imprese a Giugno 2017.   LNF e le tecnologie per lo SPAZIO: Laboratori di test e calibrazione Ai LNF operano alcuni laboratori capaci di fornire test e calibrazione di strumenti, dispositivi e componenti per applicazioni spaziali. Queste attività riguardano strumenti per la telemetria e altimetria laser, test ambientali per cubo- e micro-satelliti, radiazioni di sincrotrone nel visibile, UV, infrarosso, raggi X, fotoni gamma, elettroni e positroni. L’attività è condotta in partnership istituzionali tra INFN e NASA-SSERVI (Solar System Exploration Research Virtual Institute) e ASIF (ASI Supported Irradiation Facilities). Coordina: S. Dell’Agnello Prossimo Seminario Le tecnologie di magneti e vuoto: infrastrutture e servizi – Febbraio 2019

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## MEasuring the Gravitational constant with Atom interferometry for Novel fundamental physics TEst (MEGANTE)

Starting from the original experiment performed by Henry Cavendish more than two centuries ago, the precision determination of the gravitational constant G remains a challenging endeavor. It has been measured about a dozen times over the last 50 years, but the results have varied much more than what would be expected from random and systematic errors. Likely, this is due to the fact that, so far, all the past experiments have relied on macroscopic classical instruments, which could all be governed by uncontrolled mechanical influences. On the other hand, a recent controversial study about correlations between the measured values of G and the variations of the length of day seems to suggest that some other not well-understood effects could be present. The MEGANTE experiment (ERC-StG-2018 hosted by INFN) will address all these issues by carrying out precision G determinations making use of original experimental strategies based on quantum sensors. Unprecedented accuracy levels will be achieved using cold atoms in free-fall to probe the gravitational field, surpassing thus the state-of-art measurements based on torsion balance and simple pendulum. In parallel, MEGANTE will provide results that go far beyond the pure metrological interest. Indeed, owing the lack of a full understanding of gravity, several theoretical models predict new physics phenomena such violations of the inverse square law or a dependency of the G value from the local density of the matter. In the present talk I will present all the scientific and technical challenges that are needed to be faced in order ...

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