The quest for new physics with the Physics Beyond Colliders programme

Abstract

undamental particle physics finds itself currently in the interesting position of being absolutely certain that there must be physics beyond the current Standard Model (SM), describing elementary particles and the weak, electromagnetic and strong forces, while at the same time facing the challenge that it seems exceedingly hard to find 1. Convincing evidence from cosmology suggests that 95% of all the matter and energy in the Universe consists of dark matter (DM) and dark energy, which are not described within the SM, although the vast majority of experiments on Earth agree to astonishing precision with SM predictions. Two ways exist to reconcile beyond Standard Model (BSM) physics with a nonobservation in present experiments: new particles could be either very massive or very weakly interacting with the SM 2-4 .

Layouts for fixed-target experiments and dipole moment measurements of short-lived baryons using bent crystals at the LHC

“…is the total beam loss rate for a certain beam lifetime τ and circulating intensity I (t), 1 2 is the sharing of the total loss rate between the horizontal and vertical planes [45], is the channeling efficiency of Cry 1 (i.e. fraction of impacting protons trapped between crystalline planes for the entire path in the crystal).…”

“…Several studies are on-going at CERN in the framework of the Physics Beyond Collider study group [1]. The main aim is to assess the potential of the CERN accelerator complex and infrastructure to expand the physics reach beyond highenergy colliders.…”

“…In 2018, additional measurements were carried out in the SPS by adding to the setup a target upstream of the second crystal [14]. However, stored beams of 270 GeV/c are available at the SPS and the measurement of c magnetic moment produced in fixed target by sub-TeV protons would require a prohibitive data-taking time 1 [4,15], while using multi-TeV beams at the LHC would make it feasible [16].…”

Neutrino scattering at nuSTORM (BoA #1018)

“…In September 2016 CERN established the Physics Beyond Colliders (PBC) study group to consider ways in which the accelerators at CERN could be used or extended to support a diverse physics programme to complement the energy-frontier physics being pursued using the LHC [35]. The feasibility of implementing nuSTORM at CERN was included as a work package in the PBC study.…”

A theory of particle physics about quantum number constrained equation and particle singularity

“…For instance, Gell-Mann-Nishijima formula is a very successful quantum number constrained equation for hadrons, it refers to the relationship between hadron charge, isospin third component, baryon number and singular number. In order to describe the properties of singular sub, singular number is also introduced into the formula [15][16][17][18]. Inspired by this formula, some problems need to be considered are put forward: What is the deeper physical mechanism on which the formula is established?…”