The Standard Model may be a valid effective field theory all the way up to the Planck scale, still it suffers from a number of theoretical and observational shortcomings. I will overview the arguments for a possible existence of new particles with masses below the electroweak scale and discuss the experimental prospects to search for them.
We review the theoretical and phenomenological motivation for axions, ALPs and other very light particles as well as the state of the art in present and future experimental searches with a particular emphasis on the possibility of them forming part of the dark matter of the Universe.
I will discuss the possibility that the nature of the dark energy driving the observed acceleration of the Universe on giga-parsec scales may be determined first through metre scale laboratory based atom interferometry experiments. I will begin by discussing why our attempts to solve the cosmological constant problem lead to the introduction of new, light degrees of freedom. In order to be...
Slow extraction from the SPS is essential for present and future Fixed Target beams in the North Area, and will be a key feature of the beam for the proposed Beam Dump Facility experiments like SHiP. The 3rd integer resonant extraction mechanism and accelerator components used to remove the beam from the accelerator intrinsically generate a few percent of beamloss, most of which is localised...
In the past CERN has explored in some depth options for upgrades or novel exploitation of the accelerator complex. These options are briefly revisited. Putting aside neutrinos, RIB, and neutrons, their possible application (or not) as a driver for muon physics - complementary to existing worldwide efforts - is considered. Finally an alternative approach is introduced.
The storage ring technique to search for the EMD of the proton and deuteron is introduced. The accelerator physics and technical challenges are outlined. Work is ongoing worldwide to address these challenges and progress is briefly summarised. Physics motivation is discussed in a companion presentation at this workshop - 'EDM measurement in a proton storage ring'.
The Neutrinos from Stored Muons (nuSTORM) facility has been designed to deliver beams of nu_e and nu_mu from the decay of a stored ?? beam. nuSTORM has the potential to:
- Serve the future long- and short-baseline neutrino-oscillation
programmes by providing definitive measurements of ,?nu_e N and nu_mu
?N scattering cross sections with percent-level precision; and - Allow...
The high intensity secondary beams at the SPS M2 beam line in combination with the world’s largest polarized nucleon targets as well as large liquid hydrogen and a broad variety of nuclear targets put the COMPASS collaboration in a unique position as a universal experimental facility to study previously unexplored aspects of meson and nucleon structure, QCD dynamics and hadron...
NA61/SHINE is a multi-purpose experimental facility to study hadron production in hadron-proton, hadron-nucleus and nucleus-nucleus collisions for physics of strong interactions, neutrinos and cosmic-rays. NA61/SHINE approved data taking programme should be completed by the end of 2018. This presentation summarizes requests for new measurements and necessary facility upgrades. The former...
Searches for dark-matter (DM) candidates in the MeV to few-GeV mass range feebly interacting with SM particles are generating much interest: as suggested by different authors, thermal relics due to these long-lived particles might account for the observed DM abundance in the universe. Provided NA62 reaches its limiting sensitivity for the precise measurement of the ultra-rare FCNC K+ —> pi+ nu...
Experiments at the Antiproton Decelerator of CERN compare the fundamental properties of matter/antimatter conjugates at lowest energies and with great precision. Such efforts provide stringent tests of the fundamental charge-parity-time invariance of the Standard Model, and allow testing of the equivalence principle of general relativity. Using single particles in Penning traps the most...
The search for physics beyond the Standard Model can be performed complementary to high-energy physics by conducting studies at lowest energies. The achieved extraordinary precision is needed for reaching similar or even improved sensitivity limits. Radionuclides provide in this respect an ideal laboratory for addressing properties of all known fundamental interactions. High-precision nuclear...
The experimental evidence for BSM physics such as the non-zero neutrino masses, the baryon asymmetry in the Universe, and the presence of non-baryonic dark matter may have their origin in new physics involving very weakly interacting particles as predicted by models with a secluded or hidden sector of particles. In general, these models contain mediators that couple very weakly with SM...
The NA64 is a fixed-target experiment aiming to search for dark sector physics with a high-energy electron beam at the CERN SPS. The experiment uses a new approach combining the active beam dump and missing energy techniques. We present the future NA64 research program which is significantly extended
%and has a certain advantages compared to the classical beam dump approach.
by...
A measurement of the proton EDM to better than 10-29ecm, or better, allows us to probe physics in a new regime up to ~3PeV mass scale. The use of the storage ring EDM technique permits 5 orders of magnitude improvement over current indirect measurements of dp (from Hg) and 3 orders magnitude more sensitivity on QCD inferred from neutron EDM measurements. Non-zero values of the pEDM would...
Precise measurements of the branching ratios (BRs) for the flavor-changing
neutral current decays $K\to\pi\nu\bar{\nu}$ can provide unique constraints
on CKM unitarity and, potentially, evidence for new physics. It is important
to measure both decay modes, $K^+\to\pi^+\nu\bar{\nu}$ and
$K_L\to\pi^0\nu\bar{\nu}$, since different new physics models affect the rates
for each channel differently....
The anomalous magnetic moment g-2 of the muon is a precision measurement which exhibits a 3.5$\sigma$ deviation between theory and experiment, and in the next few years will be measured at Fermilab and J-PARC with even higher precision.
The hadronic contribution to the muon g-2 ($a^{\rm HLO}_{\mu}$) is the most important one after the pure QED contribution. It is however affected by a large...
The lifetime of the short-lived ($\tau_{th}$ about $3\times10^{-15}$ s in the ground state) $\pi^+K^-$, $K^+\pi^-$, ($\pi^+\pi^-$ ) atoms($A_{\pi^+K^-}$, $A_{K^+\pi^-}$ and $A_{2\pi}$ ) is given within 1% (0.6%) precision by the S-wave $\pi K$ ($\pi\pi$) scattering length combination $|a_{1/2}-a_{3/2}|$ ($|a_0-a_2|$), where 1/2, 3/2 (0, 2) are the isospin values. Furthermore, the study of...
The theory of strong interactions, Quantum Chromodynamics (QCD), predicts a rich variety of different phases of strongly interacting matter. The QCD phase diagram is usually represented as a function of the temperature and baryon density. At sufficiently high temperatures, a transition from hadronic matter to a Quark-Gluon Plasma (QGP), a state where quarks and gluons are no more confined...
This contribution discusses the possibility of broadening the present CERN research programme by a new component, making use of a novel concept of the light source. The proposed, partially stripped ion beam driven, light source is the backbone of the Gamma Factory initiative. It could be realized at CERN by using the infrastructure of the already existing accelerators. It could push the...
In this talk, we review a number of recent ideas$^*$ put forward in favour of a fixed-target programme at the LHC - AFTER@LHC- dedicated to heavy-ion, hadron, spin and astroparticle physics. By extracting the beam with a bent crystal or by using an internal gas target, the multi-TeV LHC beams allow one to perform the most energetic fixed-target experiments ever with which one can access the...
The magnetic moments of baryons containing u,d and s quarks have been extensively studied and measured. The experimental results are all obtained by a well-assessed method that consists in measuring the polarisation vector of the incoming particles and the precession angle when the particle is travelling through an intense magnetic field. The polarization is evaluated by analysing the angular...
The AWAKE experiment [1] will be taking data over the next two years
to establish the method of proton-driven plasma wakefield
acceleration. An R&D programme is being formulated for post-LS2 in
which the AWAKE experiment demonstrates [2] that bunches of about $10^9$
electrons with an energy of 10 GeV accelerated in about 10 m of
plasma are achievable and that the energy gain is scalable...
Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs woudl be copiously produced at the sun's interior, and in addition they are very well motivated candidates for the Dark...
Sensitive measurements on the short range interactions between macroscopic bodies provide a window on possible physics beyond the standard model, including extra-dimensions, scalar dark matter and dilatons. The sub-micron scale distances is presently not accessible to experimental investigation, and may hold the key to understanding at least part of the dark matter puzzle.
The a-KWISP...
The DarkSide-50 dark matter detector at LNGS is a two-phase argon TPC, installed at the center of two nested veto detectors, a 30-tonne liquid scintillator neutron veto and a 1,000-tonne water Cherenkov muon veto. While operating in 2014 with a fill of argon extracted from the atmosphere, DarkSide-50 demonstrated its capability to operate in a background-free mode even in presence of the...
