I. Hoş

A bstract We describe a proposal to add a set of very forward detectors to the CMS experiment for the high-luminosity era of the Large Hadron Collider to search for beyond the standard model long-lived particles, such as dark photons, heavy neutral leptons, axion-like particles, and dark Higgs bosons. The proposed subsystem is called FACET for F orward- A perture C MS E x T ension, and will be sensitive to any particles that can penetrate at least 50 m of magnetized iron and decay in an 18 m long, 1 m diameter vacuum pipe. The decay products will be measured in detectors using identical technology to the planned CMS Phase-2 upgrade.

The RADiCAL Collaboration is conducting R\&D on high performance electromagnetic (EM) calorimetry to address the challenges expected in future collider experiments under conditions of high luminosity and/or high irradiation (FCC-ee, FCC-hh and fixed target and forward physics environments). Under development is a sampling calorimeter approach, known as RADiCAL modules, based on scintillation and wavelength-shifting (WLS) technologies and photosensor, including SiPM and SiPM-like technology. The modules discussed herein consist of alternating layers of very dense (W) absorber and scintillating crystal (LYSO:Ce) plates, assembled to a depth of 25 $X_0$. The scintillation signals produced by the EM showers in the region of EM shower maximum (shower max) are transmitted to SiPM located at the upstream and downstream ends of the modules via quartz capillaries which penetrate the full length of the module. The capillaries contain DSB1 organic plastic WLS filaments positioned within the region of shower max, where the shower energy deposition is greatest, and fused with quartz rod elsewhere. The wavelength shifted light from this spatially-localized shower max region is then propagated to the photosensors. This paper presents the results of an initial measurement of the time resolution of a RADiCAL module over the energy range 25 GeV $\leq$ E $\leq$ 150 GeV using the H2 electron beam at CERN. The data indicate an energy dependence of the time resolution that follows the functional form: $\sigma_{t} = a/\sqrt{E} \oplus b$, where a = 256 $\sqrt{GeV}$~ps and b = 17.5 ps. The time resolution measured at the highest electron beam energy for which data was currently recorded (150 GeV) was found to be $\sigma_{t}$ = 27 ps.

As a high energy e–p collider, FCC-he, has been recently proposed with sufficient energy options to investigate Higgs couplings. To analyze the sensitivity on Higgs boson couplings, we focus specifically on the CP-even and CP-odd Wilson coefficients with hhZZ and hhγγ four-point interactions of Higgs boson with Effective Lagrangian Model through the process e−p→hhje−. We simulate the related processes in FCC-he, with 60 GeV and 120 GeV e− beams and 50 TeV proton beam collisions. We present the exclusion limits on these couplings both for 68% and 95% C.L. in terms of integrated luminosities.

We calculate BSM hadronic matrix elements for K 0 -K0 mixing in the Dual QCD approach (DQCD).The ETM, SWME and RBC-UKQCD lattice collaborations find the matrix elements of the BSM density-density operators O i with i = 2-5 to be rather different from their vacuum insertion values (VIA) with B 2 ≈ 0.5, B 3 ≈ B 5 ≈ 0.7 and B 4 ≈ 0.9 at µ = 3 GeV to be compared with B i = 1 in the VIA.We demonstrate that this pattern can be reconstructed within the DQCD through the nonperturbative meson evolution from very low scales, where factorization of matrix elements is valid, to scales O(1 GeV) with subsequent perturbative quark-gluon evolution to µ = 3 GeV.This turns out to be possible in spite of a very different pattern displayed at low scales with B 2 = 1.2, B 3 = 3.0, B 4 = 1.0 and B 5 ≈ 0.2 in the large-N limit, N being the number of colours.Our results imply that the inclusion of meson evolution in the phenomenology of any non-leptonic transition like K 0 -K0 mixing and K → ππ decays is mandatory.While meson evolution, as demonstrated in our paper, is hidden in lattice QCD results, to our knowledge, DQCD is the only analytic approach for non-leptonic transitions and decays which takes this important strong dynamics into account.

As an high energy e-p collider, FCC-he, has been recently proposed with sufficent energy options to investigate Higgs couplings. To analyse the sensitivity on the Higgs boson couplings, we study spesifically on the CP-even and CP-odd Wilson coefficients with $hhZZ\:$and $hh\gamma\gamma\:$ four-point interactions of Higgs boson in Effective Lagrangian Model through the process $e^{-}p\to hhje^{-}$ . We simulated the related processes in FCC-he, with 60 GeV and 120 GeV $e^{-}$ beam and 50 TeV proton beam options. We present the exclusion limits on these couplings both for 68% and 95% C.L.'s in terms of integrated luminosities.

Charge-dependent anisotropy Fourier coefficients ($v_n$) of particle azimuthal distributions are measured in pPb and PbPb collisions at $ \sqrt{\smash[b]{s_{_{\mathrm{NN}}}}} = $ 5.02 TeV with the CMS detector at the LHC. The normalized difference in the second-order anisotropy coefficients ($v_2$) between positively and negatively charged particles is found to depend linearly on the observed event charge asymmetry with comparable slopes for both pPb and PbPb collisions over a wide range of charged particle multiplicity. In PbPb, the third-order anisotropy coefficient, $v_3$, shows a similar linear dependence with the same slope as seen for $v_2$. The observed similarities between the $v_2$ slopes for pPb and PbPb, as well as the similar slopes for $v_2$ and $v_3$ in PbPb, are compatible with expectations based on local charge conservation in the decay of clusters or resonances, and constitute a challenge to the hypothesis that the observed charge asymmetry dependence of $v_2$ in heavy ion collisions arises from a chiral magnetic wave.

Lung cancer is one of the leading causes of cancer - related deaths. Recently, radiotherapy is being used extensively for the treatment of patients suffering from cancer. Proton therapy is a very suitable form of radiation therapy for tumors that occur in the vicinity of critical tissues such as lung, due to the unique characteristics of the protons used in the treatment. In this study, a geometry model with lung, heart, tumor and bone structures in a water phantom is modeled with the Monte Carlo simulation tool vGATE, version of 7.2. With this simulation, the accumulated dose are calculated for each organ.

Higher collision energies at future colliders will eventually lead to the falsification of standard fixed-order perturbation theory and linear evolutions due to non-linear structure of QCD at small-x. New physics researches that is strictly based on accurate jet measurements will undoubtedly have this observation known as BFKL effect via angular jet decorrelations taking into account the Mueller-Navelet jets. As one of the frontier colliders, FCC-ep, has a great observation potential on parton densities through asymmetrical collisions. We aim to test the observability of azimuthal angular jet decorrelations with the recent event generators (HERWIG, PYTHIA) at the particle level for FCC-ep centre of mass energies 3.5 TeV in proton-electron collisions. Jets are reconstructed by the Anti-kT algorithm (R = 0.5), with p_{T} > 35 GeV and selected in the rapidity range of |y|<6. Relevant rapidity regions has been analyzed with the azimuthal-angle difference between Mueller-Navelet Jets ({\Delta}{\Phi}) in the rapidity seperation ({\Delta}y) and the distributions of cosn({\pi}-{\Delta}{\Phi}) are presented in comparison as the result.

Higher collision energies at future colliders may eventually lead to the falsification of standard fixed-order perturbation theory and linear evolutions due to non-linear structure of QCD at small-x. New physics researches that is strictly based on accurate jet measurements will undoubtedly have this observation known as BFKL effect via angular jet decorrelations taking into account the Mueller-Navelet jets. As one of the frontier colliders, FCC-ep, has a great observation potential on parton densities through asymmetrical collisions. We aim to test the observability of azimuthal angular jet decorrelations with the recent event generators (HERWIG, PYTHIA) at the particle level for FCC-ep centre of mass energies 3.5 TeV in proton-electron collisions. Jets are reconstructed by the Anti-kT algorithm (R = 0.5), with $p_{T} > 35 GeV$ and selected in the range of |y|<6. Relevant rapidity regions has been analyzed with the azimuthal-angle difference between Mueller-Navelet Jets (${\Delta}{\Phi}$) in the rapidity seperation (${\Delta}y $) and the distributions of cosn(${\pi}-{\Delta}{\Phi}$) are presented in comparison as the result.