Physics Beyond Colliders Annual Workshop

21 Nov 2017, 08:00 → 22 Nov 2017, 23:20 Europe/Zurich

500/1-001 - Main Auditorium (CERN)

Claude Vallee (Centre de Physique des Particules de Marseille), Joerg Jaeckel (ITP Heidelberg), Mike Lamont (CERN)

The aim of the Physics Beyond Colliders study group is to explore the opportunities offered by the CERN accelerator complex and infrastructure to gain new insights into some of today's outstanding questions in particle physics through projects complementary to high-energy colliders and other initiatives in the world. The focus is on fundamental physics questions that are similar in spirit to those addressed by high-energy colliders, but that may require different types of experiments.

This follow-up workshop is intended to review the status of the projects proposed at the kick-off workshop of September 2016, and to stimulate further new ideas for which we encourage the submission of abstracts.

The workshop will be webcast.

Organizing Committee: Joerg Jaeckel, Mike Lamont, Connie Potter, Claude Vallée

PBC home page

PBC-mandate.pdf

PBC-POSTER-17.png

Tuesday, 21 November

08:30 → 09:00 Introduction

08:30 Introduction

Speaker: Claude Vallee (Centre de Physique des Particules de Marseille)

PBC_introduction.pdf

09:00 → 09:30 Exploring Hidden Sector Physics with an electron beam facility

Speaker: Philip Schuster (Perimeter Institute for Theoretical Physics)

CERN_Nov2017_Schuster.pdf

09:30 → 12:50 BSM

09:30 Overview of the BSM landscape

Where we stand, possibilities, comparative reach

Speaker: Joerg Jaeckel (ITP Heidelberg)

BSM-9.pdf

10:00 SHiP

Speaker: Richard Jacobsson (CERN)

2017_11_SHiP_PBC.pdf

10:20 NA62++

Speaker: Tommaso Spadaro (INFN e Laboratori Nazionali di Frascati (IT))

Spadaro_NA62++_PBC_21_11_2017_d2_169_F.pdf

10:40 Coffee

11:10 KLEVER

Speaker: Cristina Lazzeroni (University of Birmingham (GB))

PBC_21Nov2017_KLEVER.pdf

11:30 NA64++

Speaker: Sergei Gninenko (Russian Academy of Sciences (RU))

na64_gninenko-2017.pdf

11:50 LSW

Speaker: Axel Lindner (DESY)

LSW-171121.pdf

12:10 EDM

Speaker: Yannis Semertzidis (CAPP/IBS and KAIST in South Korea)

YkS_cpEDM_Physics_Systematics_2017_1121V2.pdf

YkS_cpEDM_Physics_Systematics_2017_1121V2.ppt

12:30 IAXO

Speaker: Igor Garcia Irastorza (Universidad de Zaragoza (ES))

Irastorza_IAXO_BeyondColliders_Nov_.pdf

Irastorza_IAXO_BeyondColliders_Nov_.pptx

14:00 → 17:45 QCD

14:00 Overview of the QCD landscape

Landscape, where we stand, possibilities, comparative reach

Speakers: Gunar Schnell, Jan M. Pawlowski (University of Heidelberg), Markus Diehl

QCD-PBC-2017-11-21.pdf

14:30 LHCb fixed target - SMOG

Speaker: Giacomo Graziani (INFN, Sezione di Firenze (IT))

graziani_LHCbFT.pdf

14:45 Polarized fixed target at LHC

Speaker: Pasquale Di Nezza (INFN e Laboratori Nazionali di Frascati (IT))

LHCSpin - PBC Nov 17.pdf

15:00 ALICE fixed target

Speaker: Laure Marie Massacrier (Université Paris-Saclay (FR))

ALICEfixedTarget_PBC.pdf

15:15 AFTER

Speaker: Jean-Philippe Lansberg (IPN Orsay, Paris Sud U. / IN2P3-CNRS)

AFTER-PBC_Lansberg_201117.pdf

15:30 Coffee

16:00 Crystal based experiments

Speaker: Achille Stocchi (Universite de Paris-Sud 11 (FR))

StocchiPBC2017-v2.pdf

16:15 NA60++

Speaker: Gianluca Usai (Universita e INFN, Cagliari (IT))

PBC-nov-2017-usai.pdf

16:30 NA61++

Speaker: Marek Gazdzicki (Johann-Wolfgang-Goethe Univ. (DE))

PBC_MG_v10.pdf

PBC_MG_v10.pdf

PBC_MG_v10.pptx

16:45 DIRAC++

Speaker: Leonid Nemenov (Joint Institute for Nuclear Research (RU))

pbc-november 2017.pdf

17:00 MUonE

Speaker: Graziano Venanzoni (INFN e Laboratori Nazionali di Frascati (IT))

gv_pbc_cern_1711121.pdf

gv_pbc_cern_1711121.ppt

17:15 COMPASS

Speaker: Oleg Denisov (INFN, sezione di Torino)

PBC_2017_11_Oleg_talk.pdf

PBC_2017_11_Oleg_talk.pptx

18:00 → 19:00 Drink - Resturant 1 - main building

Wednesday, 22 November

09:00 → 12:30 Accelerator

09:00 Accelerator side: introduction

Speaker: Mike Lamont (CERN)

ACC-intro-PBC-workshop-Nov17.pdf

ACC-intro-PBC-workshop-Nov17.pptx

09:15 Complex performance post LIU

Speaker: Eirini Koukovini Platia (CERN)

Complex_performance_postLIU_Koukovini_Platia.pptx

09:30 Conventional beams

Speaker: Lau Gatignon (CERN)

Conventional_Beams-LG-22112017.pdf

Conventional_Beams-LG-22112017.pptx

09:50 Gamma factory

Speaker: Mieczyslaw Krasny (Centre National de la Recherche Scientifique (FR))

KRASNY_GF_PBC_NOV_2017.pdf

KRASNY_GF_PBC_NOV_2017.pptx

10:10 EDM

Speaker: Jorg Pretz (Rheinisch Westfaelische Tech. Hoch. (DE))

jpretz_pbc_cern_nov17.pdf

10:30 Coffee

11:00 Beam Dump Facility

Speaker: Mike Lamont (CERN)

BDF-PBC-workshop-Nov17.pdf

BDF-PBC-workshop-Nov17.pptx

11:20 LHC fixed target

Speaker: Massimiliano Ferro-Luzzi (CERN)

MFL_PBC_FixtWG_22Nov2017_final.pdf

11:40 AWAKE++

Speakers: Edda Gschwendtner (CERN), Matthew Wing (University College London)

AWAKE-PBC2017-Edda.pdf

AWAKE-PBC2017-Edda.pptx

11:55 nuSTORM

Speaker: Kenneth Richard Long (Imperial College (GB))

2017-11-22-nuSTORM-LONG.pdf

2017-11-22-nuSTORM-LONG.pptx

12:10 Technology

Speakers: Andrzej Siemko (CERN), Babette Dobrich (CERN)

final_techno.pdf

14:00 → 15:30 New ideas: Abstracts received

14:00 Light Dark Matter Searches with Carbon Nanotubes

Directional detection of Dark Matter particles in the MeV mass range could be accomplished by studying electron recoils in large arrays of parallel carbon nanotubes. In a scattering process with a lattice electron, a DM particle might transfer sufficient energy to eject it from the nanotube surface. An external electric field is added to drive the electron towards the open ends of the array, where it is eventually detected. The anisotropic response of this detection scheme, as a function of the orientation of the target with respect to the DM wind, is calculated, and it is concluded that no direct measurement of the electron ejection angle is needed to explore significant regions of the light DM exclusion plot. A standard compact photomultiplier, in which the photocathode element is substituted with a dense array of parallel carbon nanotubes, could serve as the basic detection unit. For DM particles in the GeV mass range, ion channeling phenomena in carbon nanotubes can be exploited.

Speaker: Antonio Polosa (Sapienza Universita` di Roma)

cntcern-adp.pdf

14:15 A new experiment for axion-like particle search

In Particle Physics, axions appear in very well motivated extensions of the Standard Model including the Peccei-Quinn mechanism proposed to solve the long-standing strong-CP problem. Together with the weakly interacting massive particles of supersymmetric theories, axions are also a favored candidate for resolving the Dark Matter issue.
I propose a new detection scheme for the search of axion-like particles based on a Light-Shining- Through-Wall (LSW) experiment in a photon frequency domain never explored before, at very low energy and with extremely intense photon sources.
The aim of the project is the design of a different and innovative experiment, based on the implementation of a new single-photon detector working in the sub-THz region, and exploiting nano-technology devices at energy and temperature ranges never used in Particle Physics before.
The ultimate goal is to answer one of the most pressing questions in Particle Physics with an unusual approach, based on state-of-the-art, and beyond, nano- and quantum-technology: using leading edge nano- tech detectors to investigate fundamental issues of Particle Physics.
With radiation sources below the THz, thanks to the use of high luminosity klystrons or gyrations, present laboratory exclusion limits on axion-like particles might be improved by few orders of magnitude.The underlying idea of this proposal has been recently published in a paper in the Physics of the Dark Universe journal (see pays. Dark Univ. 12, 37 (2016) for details).

Speaker: Paolo Spagnolo (INFN Sezione di Pisa, Universita' e Scuola Normale Superiore, P)

PBC2017.pdf

14:30 Measuring vacuum magnetic birefringence with static high-field superconducting magnets

For many years the PVLAS collaboration has been working on trying to measure vacuum magnetic birefringence using optical techniques. That electrodynamics in vacuum is non-linear was predicted in 1935 [H. Euler and B. Kockel, Naturwiss, 23, 246 (1935)] and the first experimental proposal to detect the leading nonlinear effect, namely vacuum magnetic birefringence closely related to light-by-light elastic scattering, dates back to the early eighties at CERN following an idea by E. Iacopini and E. Zavattini [Phys. Lett. B, 85, 151 (1979)]. A lot of progress has been made since but the goal still needs to be reached. Recently Turolla et al. [Monthly Notices of the Royal Astronomical Society, Volume 465, Issue 1, 11 February 2017, Pages 492–500] have indirectly inferred evidence of vacuum magnetic birefringence from the observation of a neutron star and ATLAS has directly observed $\gamma-\gamma$ interactions at high energies [Nature Physics 13, 852–858 (2017)]. A direct observation at low energies is still lacking.

At present the PVLAS collaboration has reached an experimental value for the relevant parameter $\frac{\Delta n}{3B^2}$ to be compared with $A_e$ describing the non linear behaviour of electrodynamics in vacuum of $\frac{\Delta n^{\rm (PVLAS)}}{3B^2} = (6 \pm 9) \times 10^{-24}$ T$^{-2}$ to be compared with the theoretical predicted value of $A_e = 1.32\times 10^{-24}$ T$^{-2}$. Although the measured value is approaching the goal it was obtained with an integration of $5\times 10^6$ s and is at present limited by wideband noise and not systematic effects. Further integration does not seem to be the best approach.

The sensitivity of the PVLAS apparatus is far from being shot-noise limited with a wideband contribution which still needs to be understood and is under investigation. Past and present experiments using the same, or a similar, approach also suffer from a similar problem. As can be seen in the attached figure the birefringence noise of our and other experiments seems to lay on a power curve and diminishes with frequency.

So the two main ingredients are for an experiment aiming at measuring directly vacuum magnetic birefringence using light are: high modulation frequency of the signal and a high value for the integral $\int{B^2 dl}$. Typical values today are $\int{B^2 dl}\approx 10-20$ T$^{2}$m at frequencies of the order of tens of Hertz.

Very high values of $\int{B^2 dl}\approx 1000 - 5000$ T$^{2}$m can be obtained with accelerator superconducting magnets like the HERA magnets and the ones in LHC. The problem is to modulate the effect at a reasonably high frequency. In the past, rotating the polarisation of the light entering the polarimeter has been proposed by OSQAR but difficulties have been encountered, e.g. mirror birefringence. A new possible technique, published in 2016 [Eur. Phys. J. C (2016) 76:294] and still to be tested, proposes the insertion of two synchronously rotating half-wave plates inside the Fabry-Perot cavity (with therefore a relatively low finesse of $\approx 10^3$) each one on either side of the magnetic field so as to have a rotating polarisation $only$ in the static magnetic field but $not$ on the mirrors of the cavity.

This idea, with its possible drawbacks, will be presented thinking on the lines of using an LHC magnet at CERN.
[Experimental birefringence sensitivities of experiments designed to measure vacuum magnetic birefringence. The continuous line is a fit resulting in a power law $S_{\Delta n}=f^k$ with $k=-0.78$]. 1

Speaker: Guido Zavattini (Università di Ferrara)

Zavattini.pdf

14:45 Precision measurements in nuclear beta decay at ISOLDE

Speakers: Martin Gonzalez-Alonso (CERN), Stephan Malbrunot (CERN)

PBC.pdf

15:10 Search for new physics via EDM of heavy and strange baryons at the LHC

Speaker: Fernando Martinez Vidal (IFIC - University of Valencia and CSIC (ES))

MartinezVidal_PBC_Nov17_v4.pdf

15:30 → 16:00 Coffee

16:00 → 17:15 New ideas II: Other new ideas

16:00 Probing QED in the strong-field limit with the XFEL at DESY

Speaker: Matthew Wing (University College London)

LUXE_Wing.pdf

16:20 A possible implementation of an electron beam facility at CERN

Speaker: Steinar Stapnes (CERN)

e-beams.pdf

e-beams.pptx

16:40 REDTOP: Rare Eta Decays with a TPC for Optical Photons

Speaker: Roberto Carosi (INFN - National Institute for Nuclear Physics)

redtop-carosi.pdf

17:15 → 17:30 Closeout