Since the last update of the European strategy on particle physics (ESPP) the
interest in hypothetical very weakly interacting slim particles, dubbed WISPs,
has gained significant momentum. Searches for WISPs with masses below
about 1 eV require new approaches beyond accelerator experiments. This document
summarizes the physics case, the experimental status and its prospects
for the...
The current generation of short baseline neutrino experiments is
approaching intrinsic source limitations in the knowledge of flux,
initial neutrino energy and flavor. A dedicated facility based on
conventional accelerator techniques and existing infrastructures
designed to overcome these impediments would have a remarkable impact
on the entire field of neutrino oscillation physics. It would...
The Global Neutrino Network is an association of the neutrino telescope projects targeting the investigation of cosmic and atmospheric neutrinos in the energy range from GeV to beyond PeV. The main scientific objectives are the exploration of high-energy cosmic neutrinos from non-thermal astrophysical sources (neutrino astronomy), the investigation of fundamental questions of particle physics...
This document summarises the physics interest, sensitivity reach and competitiveness of a future general-purpose fixed-target facility for Particle Physics research. Based upon the versatile M2 beam line of the CERN SPS, a great variety of measurements is proposed to address fundamental issues of Quantum Chromodynamics.
The present document discusses plans for a compact, next-generation multi-purpose detector at the LHC as a follow-up to the present ALICE experiment. The aim is to build a nearly massless barrel detector consisting of truly cylindrical layers based on curved wafer-scale ultra-thin silicon sensors with MAPS technology, featuring an unprecedented low material budget of 0.05$\%$ X$_0$ per layer,...
Worldwide, the particle physics and accelerator community is very actively working towards the next major facility. We emphasize the need to evaluate and compare progress on linear and circular e+e- collider designs in the 100 to 360 GeV centre-of-mass energy and their respective performance potential for making the optimal choice.
APPEC strongly supports and encourages the prospects of an even stronger synergy between Astroparticle Physics and Cosmology with Particle Physics. Areas of synergy between the above domains are identified: dark matter and dark energy; multi-messenger astrophysics, with the recently achieved discoveries of gravitational waves and the extraordinary opportunities also offered by gamma-ray and...
Proton-driven plasma wakefield acceleration allows the transfer of energy from a proton bunch to a trailing bunch of particles, the ‘witness’ particles, via plasma electrons. The AWAKE experiment at CERN is pursuing a demonstration of this scheme using bunches of protons from the CERN SPS. Assuming continued success of the AWAKE program, high energy electron or muon beams will become...
Please refer to the document attached.
Charged-lepton flavour-violating (cLFV) processes offer deep probes for new physics with discovery sensitivity to a broad array of new physics models — SUSY, Higgs Doublets, Extra Dimensions, and, particularly, models explaining the neutrino mass hierarchy and the matter-antimatter asymmetry of the universe via leptogenesis. The most sensitive probes of cLFV utilize high-intensity muon beams...
The search for charged lepton flavour violation (CLFV) has an enormous discovery potential in probing new physics Beyond the Standard Model (BSM). The observation of a CLFV transition would be an undeniable sign of the presence of BSM physics which goes beyond non-zero masses for neutrinos. Furthermore, CLFV measurements can provide a way to distinguish between different BSM models, which may...
Public and political support for particle physics is essential for sustaining the long-term future of the field - whether this is for attracting young people into STEM careers, gaining support from local communities for building new experiments, or for securing government funding for new and existing experiments. The importance of communicating particle physics has long been recognised by the...
This contribution aims at promoting the ground-breaking physics programme accessible with the multi-TeV LHC proton and ion beams used in the fixed-target mode. It can be realised in a parasitic mode for the LHC complex using existing detectors like those of the LHCb and ALICE collaborations or new dedicated systems during the LHC lifetime. It contains a brief description of the different...
This text summaries the consensus view of the scientific community on priorities in the field of relativistic heavy ion collisions, as expressed by the 421 registered participants of the Town Meeting held on 24 October 2018 at CERN.
The 2013 European Strategy for Particle Physics (ESPP) identified the long-baseline neutrino programme as one of the four scientific objectives that require international collaboration. This strong recommendation led to the formation of DUNE as an international collaboration in 2015. The DUNE Collaboration now includes CERN and 14 of its member states, with approximately 400 European...
This document has been prepared as an input for the discussions on an
European Strategy for Particles Physics.
We describe the status and prospect of the European community of electric dipole moment searches for the input to the update of the European strategy for particle physics.
First of all, an importance of the LHC/FCC based energy frontier lepton-hadron and photon-hadron colliders is emphasised. Then arguments favoring existence of new heavy isosinglet down-type quarks and vector-like isosinglet or isodoublet leptons are presented, following by historical arguments favoring new (preonic) level of matter. The importance of Super-Charm factory and GeV energy proton...
The Long-Baseline Neutrino Facility (LBNF) offers a unique opportunity for neutrino physics due to the high intensity (anti)neutrino beam with a broad energy spectrum. The possibility to collect unprecedented exposures alleviates one of the primary limitations of past neutrino experiments. An experimental technique has been recently proposed to achieve a control of the configuration, chemical...
As the European particle physics community engages in an updated strategy for the coming years, we present three recommendations that will ensure a more sustainable future for the field of particle physics in view of climate change. The text and recommendations are signed by 314 particle physicists, representing a diverse set of the community.
The Large Hadron Collider determines the energy frontier of experimental collider physics for the next two decades. Following the current luminosity upgrade, the LHC can be further upgraded with a high energy, intense electron beam such that it becomes a twin-collider facility, in which ep operates concurrently with pp. A joint ECFA, CERN and NuPECC initiative led to a detailed conceptual...
FASER, the ForwArd Search ExpeRiment, is a proposed experiment dedicated to searching for light, extremely weakly-interacting particles at the LHC. Such particles may be produced in the LHC's high-energy collisions in large numbers in the far-forward region and then travel long distances through concrete and rock without interacting. They may then decay to visible particles in FASER, which...
Recent decades have witnessed remarkable confirmations of the Standard Model (SM) describing the Electro-Weak and Strong Interactions. The experimental discovery of the Higgs boson Ho at the CERN/LHC has crowned a success of the SM and calls for further studies on this newly observed sector. New and more precise activities are needed in order to extend more precisely this new discovery...
This document is meant to serve as input from the IPPOG Collaboration for the open call for the European Particle Physics Strategy Update 2020. It emphasises the strategic relevance of concerted, global outreach activities in particle physics today and beyond when envisaging new large-scale projects.
We present the case for the DarkSide-Argo program for direct dark matter searches with low-radioactivity argon.
The immediate objective is the DarkSide-20k two-phase liquid argon detector, currently under construction at the Gran Sasso laboratory (LNGS). DarkSide-20k will have ultra-low backgrounds, with the ability to measure its backgrounds in situ, and sensitivity to WIMP-nucleon cross...
the Germany ALICE community points out a future direction with a new nearly massless detector
This document summarizes the conclusions of the Neutrino Town Meeting held at CERN in October 2018 to review the neutrino field at large with the aim of defining a strategy for accelerator-based neutrino physics in Europe. The importance of the field across its many complementary components is stressed. Recommendations are presented regarding the accelerator based neutrino physics, pertinent...
The European Strategy for Particle Physics (ESSP) submitted in 2013 a deliberation document to the CERN council explaining that a lepton collider with "energies of 500 GeV or higher could explore the Higgs properties further, for example the [Yukawa] coupling to the top quark, the [trilinear] self-coupling and the total width.".
In view of the forthcoming ESPP update in 2020,...
The Giant Radio Array for Neutrino Detection (GRAND) is a planned large-scale observatory of ultra-high-energy (UHE) cosmic particles — cosmic rays, gamma rays, and neutrinos with energies exceeding $10^8$ GeV. Its ultimate goal is to solve the long-standing mystery of the origin of UHE cosmic rays. It will do so by detecting an unprecedented number of UHECRs and by looking with unmatched...
On November 20 and November 21 this working group has met in order to discuss and
summarize future Hadron Physics Opportunities in Europe. The work of this working group is
based on the Long Range Plan of the Nuclear Physics European Collaboration Committee
from November 27, 2017 (NuPECC is an Expert Committee of the European Science
Foundation). Furthermore it is based on a series of four...
The Heavy Flavor Averaging Group provides with this document input to the European Strategy for Particle Physics. Research in heavy-flavor physics is an essential component of the particle-physics program, both within and beyond the Standard Model. To fully realize the potential of the field, we believe the strategy should include strong support for the ongoing experimental and theoretical...
INFN has a strong tradition in high-energy hadron physics, both in the heavy-ion sector and in the deep-inelastic-scattering sector, with important participation in international programmes, that also include relevant and specific contributions in terms of dedicated detectors. In this context, it is recognized that high centre-of-mass energy is a fundamental handle for the future...
Current research activities of Japan Proton Accelerator Research Complex (J-PARC) and the future prospects are summarized with emphasis on the particle physics experiments.
The DARWIN collaboration (www.darwin-observatory.org) is planning to build the “ultimate” underground-based direct detection dark matter detector, with a dark matter sensitivity limited only by irreducible neutrino backgrounds. The core of the detector will have a 40 ton liquid xenon target instrumented as a dual-phase time projection chamber. The large xenon target, the exquisitely low...
Input from the Netherlands for the European Strategy for Particle Physics – Update 2020
Abstract
This document summarizes the discussions of representatives of laboratories of the Joint Institute for Nuclear Research (intergovernmental, international organization in Dubna) concerning the European Strategy for Particle Physics Update. The document reflects the forward view of JINR scientists to the development of PP in Europe based on long and successful history of CERN - JINR...
See attached file
Input to the Strategy Process from LNF-INFN
Precise measurements of the branching ratios 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...
We propose a multi-purpose neutrino observatory comprising two very large detectors solving different problems at the intersection of particle physics, astrophysics and Earth science. Baikal-GVD will work jointly with KM3NET and IceCube in the Global Neutrino Network, aiming at the detection and study of high-energy astrophysical neutrinos. The new Baksan neutrino telescope (NBNT) will inherit...
MAGIS-1K: A 1000 m Atom Interferometer Device for Searches in Dark Matter and Gravity Waves
Jonathon Coleman, University of Liverpool, Merseyside, L69 7ZE, UK.
On behalf of the MAGIS-100 collaboration
This document is responding to the call for input collaboration to the update of the European Strategy for Particle Physics from the MAGIS collaboration.
Atom interferometry can be...
The observation of long-lived particles at the LHC would reveal physics beyond the Standard Model could
account for the many open issues in our understanding of our universe and conceivably point to a more
complete theory of the fundamental interactions. Such long-lived particle signatures are fundamentally
motivated and can appear in virtually every theoretical construct that addresses the...
Monte Carlo event generators (MCEGs) are the indispensable workhorses of particle physics, bridging the gap between theoretical ideas and first-principles calculations on the one hand, and the complex detector signatures and data of the experimental community on the other hand. All collider physics experiments are dependent on simulated events by MCEG codes such as Herwig, Pythia, Sherpa,...
The Protvino accelerator facility located in the Moscow region, Russia, is in a good position to enable a rich experimental research program in the field of neutrino physics. Of particular interest is the possibility to direct a neutrino beam from Protvino towards the KM3NeT/ORCA detector which is currently under construction in the Mediterranean sea 40 km offshore Toulon, France. Such an...
This document summarizes proposed searches for new physics accessible in the heavy-ion mode at the LHC, both through hadronic and ultraperipheral $\gamma\gamma$ interactions, and that have a competitive or, even, unique discovery potential compared to standard proton-proton collision studies. Illustrative examples include searches of new particles --- such as axion-like pseudoscalars, radions,...
Isaac Newton’s book ‘Opticks’ from the 18th century includes a number of hypotheses on the structure of matter. Most of the hypotheses were confirmed during the 19th and 20th centuries at the scales of nucleons, nuclei, atoms, molecules and macromolecules. Conflicts appear however at the scale of quarks and gluons according to the Standard Model of particle physics. The confirmations at the...
This document provides input to the update of the European Strategy for Particle Physics in fields that are related to Nuclear Physics as described in the NuPECC Long Range Plan 2017.
NICA Application;
NICA Addendum
The Neutrinos from Stored Muons, nuSTORM, facility has been designed to deliver a definitive neutrino-nucleus scattering programme using beams of (anti-)electron and (anti-)muon neutinos from the decay of muons confined within a storage ring. The facility is unique, it will be capable of storing muon beams with a central momentum of between 1 GeV/c and 6 GeV/c and a momentum spread of 16\%....
This document provides the inputs to the ongoing European Particle Physics Strategy based on the opportunities offered by the accelerator-based neutrino programme in Japan to which the 2013 European Strategy recommended due to the “Rapid progress in neutrino oscillation physics, with significant European involvement”, “CERN should develop a neutrino programme to pave the way for a substantial...
The AWAKE experiment had a very successful Run 1 (2016-8), demonstrating proton-driven plasma wakefield acceleration for the first time, through the observation of the modulation of a long proton bunch into micro-bunches and the acceleration of electrons up to 2 GeV in 10 m of plasma. The aims of AWAKE Run 2 (2021-4) are to have high-charge bunches of electrons accelerated to high energy,...
Abstract
The Standard Model provides estimations on neutron EDM (nEDM) value on the level inaccessible for the modern experiment: $10^{–30} – 10^{–33}$ е$\cdot$сm. CP-violation (and nEDM) arises only in the second order of smallness on the weak interaction constant. SМ fails to account for baryon asymmetry of Universe. Search for nEDM is expected to be search for some phenomena beyond the...
Abstract: In the report current plans and some ideas for future are reported for particle physics and related fields in Finland.
A fixed-target programme in the ALICE experiment using the LHC proton and lead beams offers many physics opportunities related to the parton content of the nucleon and nucleus at high-x, the nucleon spin and the Quark-Gluon Plasma. We investigate two solutions that would allow ALICE to run in a fixed-target mode: the internal solid target coupled to a bent crystal and the internal gas target....
For the field of particle physics to benefit from the immense body of data from present and possible future colliders, it is essential to be able to accurately relate the experimental observations to the underlying Lagrangian. This is the case whether searching for physics beyond the Standard Model, exploring the many facets of the Higgs sector, or pinning down fundamental parameters such as...
This document describes research program of Budker INP (Novosibirsk) on high energy physics for the next two decades based on the flagship project of the electron-positron collider Super Charm-Tau (SCT) factory. The SCT factory is designed to operate in the center-of-mass energy range from 2 to 6 GeV with peak luminosity of 10**35 cm-2s−1 above 4 GeV. Longitudinal polarization of the electron...
Based on the success of the currently running program and motivated by new physics needs the NA61/SHINE Collaboration proposes to continue the measurements of hadron and nuclear fragment production properties in reactions induced by
hadron and ion beams after the CERN Long Shutdown 2 (LS2).
These measurements are requested by heavy ion, cosmic ray and neutrino communities and they include:...
The CERN SPS offers a unique opportunity for exploring new physics due to the availability of high-quality and high-intensity secondary beams. In the 2016-18 runs, the NA64 experiment has successfully performed sensitive searches for Dark Sector and other rare processes in missing energy events using high energy electron interactions in an active dump. The NA64 Collaboration plans to...
This contribution highlights the role of QCD theory in studying the physics of the Standard Model and beyond, as well as opportunities and challenges,
as an input to the preparation of the European Particle Physics Strategy Update (EPPSU).
The REDTOP experiment is primarily intended to look for new violations of
the basic symmetries. It aims to improve the sensitivity level of key physics conservation laws by several orders of magnitude beyond those of previous experiments. In doing so, it will open doorways for possible Physics Beyond the Standard Model including dark matter and energy, and/or new forces. The REDTOP...
With the discovery of non-zero value of $\theta_{13}$ mixing angle, the next generation of
long-baseline neutrino (LBN) experiments offers the possibility of obtaining
statistically significant samples of muon and electron neutrinos and
anti-neutrinos with large oscillation effects.
In this document we intend to highlight the importance of Near Detector facilities in LBN experiments to both...
These are some suggestions concerning ongoing and future tests that can be
performed at CERN to search for possible sterile neutrinos and set
constraints on their masses and mixings. In addition to European
participation in neutrino oscillation experiments, in searches for
neutrinoless double beta decay, and in KATRIN, it is emphasized here that
sensitive searches for sterile...
There is large overlap in the research interests of the European particle physics community and the Pierre Auger Collaboration and there is a remarkable complementarity of the measurement principles and information accessible at accelerators and the Auger Observatory. With this statement, we provide input to the European Particle Physics Strategy Update 2018 - 2020. We strongly encourage very...
Fermilab is the only laboratory in the world that operates two accelerator-based neutrino beams simultaneously. These intense neutrino sources enable an important collection of experi- ments that are studying neutrinos over both short and long distances, allowing the experiments to address questions such as the neutrino mass ordering, whether additional (sterile) neutrinos exist, and whether...
The infrastructure and research related to Particle Physics plays an important role in creating a more sustainable society by actively pushing the frontiers of human understanding. Whilst positively contributing to the EU’s social and economic growth through innovation and Knowledge Transfer. In this short paper, STFC outlines its innovation strategy, in the context of Particle Physics, and...
The exploration of the phase diagram of Quantum ChromoDynamics (QCD) is carried out by studying ultrarelativistic heavy-ion collisions. The energy range covered by the CERN SPS ($\sqrt{s_{\rm \scriptscriptstyle{NN}}} \sim 6\text{--}17$~GeV) is ideal for the investigation of the region of the phase diagram corresponding to finite baryochemical potential ($\mu_{\rm B}$), and has been little...
This document is submitted as input to the European Strategy for Particle Physics Update (ESPPU). The U.S.-based Electron-Ion Collider (EIC) project recently received strong endorsement by the U.S. National Academies of Sciences, Engineering, and Medicine, bringing its realization another step closer. A large group of European scientists is already involved in the EIC project. Currently, more...
Accelerator Science and Technology
TauFV is a fixed-target experiment designed to search for Lepton Flavour Violation in tau decays, utilising a high energy, high intensity proton beam impinging on a distributed system of targets. In the baseline proposal, TauFV will be situated on the high-intensity beam line the Beam-Dump Facility of the SPS, upstream of the SHiP experiment. Its performance will rely on advanced detector...
The diverse community of scientists involved in Deep Inelastic Scattering includes about 2000 experi- mental and theoretical physicists worldwide and envisages projects such as the EIC, LHeC, FCC-eh and VHEeP as future lepton-hadron scattering facilities. The proposed facilities will address fundamental ques- tions in strong interaction / QCD physics, including a first-ever tomographic mapping...
In the present document we outline some reflections related to the next mid-term particle physics strategy: the need for complementary approach among various frontiers in searches and interpretations of NP; an experimental initiative in the aforementioned efforts, especially after the Higgs boson discovery at the LHC; the specific advantages of $e^+e^-$ over hadron colliders; and the...
We have established a biennial school in Africa, on fundamental physics and its applications (ASP). We find that fundamental physics provides excellent motivation for students of science. The aim of the school is to build capacity to harvest, interpret, and exploit the results of current and future physics experiments and to increase proficiency in related applications. The school is based on...
The Compact Linear Collider, CLIC, is a proposed e$^+$e$^-$ collider at the TeV scale whose physics potential ranges from high-precision measurements to extensive direct sensitivity to physics beyond the Standard Model. This document summarises the physics potential of CLIC, obtained in detailed studies, many based on full simulation of the CLIC detector. CLIC covers one order of magnitude...
The European Spallation Source linear proton accelerator will have a uniquely high beam power of 5 MW to be used for spallation neutron production. The beam power can be raised to 10 MW by increasing the accelerator duty cycle from 4% to 8% and the additional 5 MW used to generate a uniquely intense neutrino Super Beam ESSνSB for measurement of leptonic CP violation. ESSνSB is complementary to...
The International Axion Observatory (IAXO) is a next-generation axion helioscope that will search for solar axions with unprecedented sensitivity. IAXO has a unique position in the international landscape of axion experiments, with sensitivity to a region of the axion parameter space that no other experiment can access. In particular, it will explore QCD axion models in the meV to eV mass...
With the attached text, the authors wish to draw the attention of the high-energy community on the need to include in its strategic plan an exceptional effort towards attracting and training new young talents to particle accelerator and detector physics.
Input to the European Particle Physics Strategy by JUNO experiment, main document and addendum.
LHCSpin aims at installing a polarized gas target in front of the LHCb spectrometer, bringing, for the first time, polarized physics to the LHC. The project will benefit from the experience achieved with the installation of an unpolarized gas target at LHCb during the LHC Long Shutdown 2. LHCb will then become the first experiment simultaneously running in collider and fixed-target mode with...
We propose a new approach to measure very precisely
the hadronic leading order corrections to the muon $g-2$,
%the $\mu - e$ differential cross section in order to determine
$a_{\mu}^{HLO}$, with space-like data,
measuring the hadronic contribution to the effective electromagnetic coupling
$\alpha$, by means of the elastic scattering $\mu - e$ of 150 GeV muons
(currently available at...
This document summarizes the physics potential of the High-Energy LHC (HE-LHC), under consideration as a possible future project at CERN. The HE-LHC is a 27 TeV pp collider, to be installed in the LHC tunnel, relying on the 16 T magnet technology being developed for the 100 TeV Future Circular Collider (FCC-hh). The HE-LHC is designed to deliver 10-15 ab$^{-1}$ of integrated luminosity to two...
This document presents the executive summary of the findings of the Workshop on "The physics of HL-LHC, and perspectives on HE-LHC", which has run for over a year since its kick-off meeting on 30 October -- 1 November 2017.
We discuss here the HL-LHC physics programme. As approved today, this covers {\it (a)} pp collisions at 14~TeV with an integrated luminosity of 3 ab$^{-1}$ each for ATLAS...
The SHiP Collaboration has proposed a general purpose experimental facility
at the CERN SPS accelerator to search for feebly interacting GeV-scale particles.
SHiP complements the world-wide program of New Physics searches by covering a large
region of parameter space which cannot be addressed by other experiments.
The SHiP detector is sensitive both to decay and scattering signatures...
Attachments
The future lepton colliders proposed for the High Energy and Precision Frontier set stringent demands on theory. The most ambitious, broad-reaching and demanding project is the FCC-ee. We consider here the present status and requirements on precision calculations, possible ways forward and novel methods, to match the experimental accuracies expected at the FCC-ee. We conclude that the...
This letter highlights the importance of Accelerator Science and Technology for the future of particle physics and suggests some recommendations in this area for the elaboration of the update of the European Strategy for particle physics.
This document was prepared by the community that is active in Italy, within INFN (Istituto Nazionale di Fisica Nucleare), in the field of ultra-relativistic heavy-ion collisions. The experimental study of the phase diagram of strongly-interacting matter and of the Quark--Gluon Plasma (QGP) deconfined
state will proceed, in the next 10--15 years, along two directions: the high-energy regime at...
We propose to combine state of the art optical instrumentation with very high pulsed magnetic fields to study magneto-optical phenomena in the quantum vacuum, i.e. the experimental proof of the magneto-optical properties of quantum vacuum.
Our goal is to realize the first ever measurement of the linear magnetic birefringence of vacuum which corresponds to a variation in the velocity of...
