Results from a study of the radiation hardness of silicon photomultipliers (SiPMs) are presented. New ultra high density SiPMs have been recently developed by FBK for the CMS HCAL Barrel phase I upgrade. SiPMs were irradiated to a total dose of 2 x 10(12) n/cm(2) (1 MeV equivalent) at the TRIGA reactor at the JSI in Slovenia. The SiPM's main parameters were measured before and after irradiation. The effects of the neutron radiation on breakdown voltage, signal amplitude, dark current and noise for these devices are shown and discussed. (C) 2018 Elsevier B.V. All rights reserved.

We present results of the development and experimental study of the preshower detector prototypes for LHCb experiment in the test beam of SPS accelerator (CERN). The preshower detector consists of two identical layers of scintillator pads and a layer of lead converter in between. The light from pads is readout by means of wave-length shifting fiber coiled and glued inside a circular groove in the scintillator body. The study of prototypes allowed performing an optimal choice of the light collection and mechanical design of the preshower detector modules.

Results of study of the radiative kaon decay K-->pi0 e nu gamma at ISTRA+ setup are presented. 4476 events of this decay have been observed. The branching ratio is measured.

Results of the study of the K− → π0e−νγ decay at ISTRA+ setup are presented. 4476 events of this decay have been observed. The ratio of branching rati os (R), R = Br(K −→π0e−νeγ) Br(K−→π0e−νe) = (1.81± 0.03(stat.)± 0.07(syst.))× 10−2, has been obtained for E∗ γ > 10 MeV andθ ∗ eγ > 10◦. For comparison with previous experiments, the branching ra tio with cutsE∗ γ > 10 MeV, 0.6 < cosθ ∗ eγ < 0.9 is calculated,R = Br(K−→π0e−νeγ) Br(K−→π0e−νe) = (0.47± 0.02(stat.) ± 0.03(syst.)) × 10 −2. For the cutsE∗(γ) > 30 MeV andθ ∗ eγ > 20◦, used in most theoretical papers, we have obtained Br(K− → π0e−νeγ) = (3.13± 0.09± 0.14) × 10−4. For the asymmetryAξ we get Aξ = −0.015±0.021. At present it is the best estimate of this asymmetry.

Results of study of the K^ - →π ^0 e^ - νγ decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be R = Br(K^ - →π ^0 e^ - ν_e γ )/Br(K^ - →π ^0 e^ - ν_e ) = (1.81±0.03(stat.)±0.07(syst.)) × 10 −2 for E * γ > 10 MeV and θ * eγ > 10°. For comparison with the previous experiment the branching ratio with cuts E * γ > 10 MeV, 0.6 < cos θ * eγ < 0.9 is calculated: R = Br(K^ - →π ^0 e^ - ν_e γ )/Br(K^ - →π ^0 e^ - ν_e ) = (0.47±0.02(stat.) ± 0.03(syst.)) × 10 −2 . For the cuts E * γ > 30 MeV and θ * eγ > 20°, used in most theoretical papers, Br = (3.06 ± 0.09(stat.) ± 0.14(syst.)) × 10 −4 . For the asymmetry we get A ξ = −0.015 ± 0.021. At present it is the best estimate of this asymmetry.

This report presents the capabilities of the CMS experiment to explore the rich heavy-ion physics programme offered by the CERN Large Hadron Collider (LHC). The collisions of lead nuclei at energies , will probe quark and gluon matter at unprecedented values of energy density. The prime goal of this research is to study the fundamental theory of the strong interaction ? Quantum Chromodynamics (QCD) ? in extreme conditions of temperature, density and parton momentum fraction (low-x).This report covers in detail the potential of CMS to carry out a series of representative Pb-Pb measurements. These include bulk observables, (charged hadron multiplicity, low pT inclusive hadron identified spectra and elliptic flow) which provide information on the collective properties of the system, as well as perturbative probes such as quarkonia, heavy-quarks, jets and high pT hadrons which yield tomographic information of the hottest and densest phases of the reaction.

Results of study of the \(K^ - \to \pi ^0 e^ - \overline \nu \gamma \) decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be \(R = \frac{{Br(K^ - \to \pi ^0 e^ - \overline \nu _e \gamma )}}{{Br(K^ - \to \pi ^0 e^ - \overline \nu _e )}}\) = (1.81±0.03(stat.)±0.07(syst.)) × 10−2 for E*γ > 10 MeV and θ*eγ > 10°. For comparison with the previous experiment the branching ratio with cuts E*γ > 10 MeV, 0.6 < cos θ*eγ < 0.9 is calculated: R = \(\frac{{Br(K^ - \to \pi ^0 e^ - \overline \nu _e \gamma )}}{{Br(K^ - \to \pi ^0 e^ - \overline \nu _e )}}\) = (0.47±0.02(stat.) ± 0.03(syst.)) × 10−2. For the cuts E*γ > 30 MeV and θ*eγ > 20°, used in most theoretical papers, Br = (3.06 ± 0.09(stat.) ± 0.14(syst.)) × 10−4. For the asymmetry we get A ξ = −0.015 ± 0.021. At present it is the best estimate of this asymmetry.

CMS is a general purpose experiment, designed to study the physics of pp collisions at 14 TeV at the Large Hadron Collider ( LHC). It currently involves more than 2000 physicists from more than 150 institutes and 37 countries. The LHC will provide extraordinary opportunities for particle physics based on its unprecedented collision energy and luminosity when it begins operation in 2007. The principal aim of this report is to present the strategy of CMS to explore the rich physics programme offered by the LHC. This volume demonstrates the physics capability of the CMS experiment. The prime goals of CMS are to explore physics at the TeV scale and to study the mechanism of electroweak symmetry breaking - through the discovery of the Higgs particle or otherwise. To carry out this task, CMS must be prepared to search for new particles, such as the Higgs boson or supersymmetric partners of the Standard Model particles, from the start- up of the LHC since new physics at the TeV scale may manifest itself with modest data samples of the order of a few fb(-1) or less. The analysis tools that have been developed are applied to study in great detail and with all the methodology of performing an analysis on CMS data specific benchmark processes upon which to gauge the performance of CMS. These processes cover several Higgs boson decay channels, the production and decay of new particles such as Z' and supersymmetric particles, B-s production and processes in heavy ion collisions. The simulation of these benchmark processes includes subtle effects such as possible detector miscalibration and misalignment. Besides these benchmark processes, the physics reach of CMS is studied for a large number of signatures arising in the Standard Model and also in theories beyond the Standard Model for integrated luminosities ranging from 1 fb(-1) to 30 fb(-1). The Standard Model processes include QCD, B-physics, diffraction, detailed studies of the top quark properties, and electroweak physics topics such as the W and Z(0) boson properties. The production and decay of the Higgs particle is studied for many observable decays, and the precision with which the Higgs boson properties can be derived is determined. About ten different supersymmetry benchmark points are analysed using full simulation. The CMS discovery reach is evaluated in the SUSY parameter space covering a large variety of decay signatures. Furthermore, the discovery reach for a plethora of alternative models for new physics is explored, notably extra dimensions, new vector boson high mass states, little Higgs models, technicolour and others. Methods to discriminate between models have been investigated. This report is organized as follows. Chapter 1, the Introduction, describes the context of this document. Chapters 2-6 describe examples of full analyses, with photons, electrons, muons, jets, missing E-T, B-mesons and tau's, and for quarkonia in heavy ion collisions. Chapters 7-15 describe the physics reach for Standard Model processes, Higgs discovery and searches for new physics beyond the Standard Model.

Results of study of the K- -> pi(0)e(-)(v) over bar gamma decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be R = Br(K- -> pi(0)e(-)(v) over bar (e)gamma)/Br(K- -> pi(0)e(-)(v) over bar (e)) = (1.81 +/- 0.03(stat.) +/- 0.07(syst.)) x 10(-2) for E-gamma* > 10 MeV, 0.6 < cos theta(e gamma)* < 0.9 is calculated: R = Br(K- -> pi(0)e(-)(v) over bar (e)gamma)/Br(K- -> pi(0)e(-)(v) over bar (e)) = (0.47 +/- 0.02(stat.) +/- 0.03 (syst.)) x 10(-2). For the cuts E-gamma* > 30 MeV and theta(e gamma)* > 20 degrees, used in most theoretical papers, Br = (3.06 +/- 0.09(stat.) +/- 0.14(syst.)) x 10(-4). For the asymmetry we get A(xi) = -0.015 +/- 0.021. At present it is the best estimate of this asymmetry.

The decay K−→π0eν has been studied using in-flight decays detected with the “ISTRA+” spectrometer operating in the 25-GeV negative secondary beam of the U-70 PS. About 550K events were collected for the analysis. The λ+ parameter of the vector form-factor has been measured: λ+=0.0286±0.0008(stat)±0.0006(syst). The limits on the possible tensor and scalar couplings have been obtained: fT/f+(0)=0.021+0.064−0.075(stat)±0.026(syst); fS/f+(0)=0.002+0.020−0.022(stat)±0.003(syst).

The detector of the E865-collaboration at the Brookhaven-AGS described here combines a magnetic spectrometer for the charged decay products of 6GeV/cK+ with excellent electromagnetic calorimetry and efficient particle identification for electrons and muons. Its high-resolution, large acceptance and high rate capability made it well suited for the study of extremely rare or forbidden decays with multi-leptonic final states such as K+→π+μ+e−, K+→π+l+l−, K+→l+νle−e+ and K+→π+π−e+νe down to branching ratios below 10−11 in an intense K+ beam (≈108 per AGS spill).

The decay K− → e−νπ0 has been studied using in-flight decays detected with the ISTRA+ setup working at the 25-GeV negative secondary beam of the U-70 PS. About 130K events were used for the analysis. The λ+ parameter of the vector form factor has beenmeasured: λ+ = 0.0293± 0.0015(stat.)± 0.002(syst.). The limits on the possible tensor and scalar couplings have been derived: fT /f+(0) = −0.045± 0.060(stat.) and fS/f+(0) = −0.019 −0.016(stat.). c © 2002 MAIK “Nauka/Interperiodica”.

The decay K− → e−νπ0 has been studied using in-flight decays detected with the ISTRA+ setup working at the 25-GeV negative secondary beam of the U-70 PS. About 130K events were used for the analysis. The λ+ parameter of the vector form factor has been measured: λ+=0.0293±0.0015(stat.)±0.002(syst.). The limits on the possible tensor and scalar couplings have been derived: fT/f+(0)=−0.045±0.060(stat.) and fS/f+(0)=−0.019 −0.016 +0.025 (stat.).

A decommissioned LHC test magnet is being prepared as the CERN Axion Solar Telescope (CAST) experiment. The magnet has a field of 9.6 Tesla and length of 10 meters. It is being mounted on a platform to track the sun over ±8° vertically and ±45°, horizontally. A sensitivity in axion-photon coupling gαγγ < 5 × 10−11GeV−1 can be reached for mα ≤ 10−2eV, and with a gas filled tube-can reach gαγγ ≤ 10−10GeV−1 for axion masses mα < 2eV.