1,607 research outputs found
A proof-of-principle study of epigenetic therapy with hydralazine and magnesium valproate plus doxorubicin cyclophosphamide as neoadjuvant therapy for locally advanced breast cancer
A phase II study of epigenetic therapy with hydralazine and magnesium valproate to overcome chemotherapy resistance in refractory solid tumors
RPC upgrade project for CMS Phase II
The Muon Upgrade Phase II of the Compact Muon Solenoid (CMS) aims to guarantee the optimal conditions of the present system and extend the eta coverage to ensure a reliable system for the High Luminosity Large Hadron Collider (HL-LHC) period. The Resistive Plate Chambers (RPCs) system will upgrade the off-detector electronics (called link system) of the chambers currently installed chambers and place improved RPCs (iRPCs) to cover the high pseudo-rapidity region, a challenging region for muon reconstruction in terms of background and momentum resolution. In order to find the best option for the iRPCs, an R&D program for new detectors was performed and real size prototypes have been tested in the Gamma Irradiation Facility (GIF++) at CERN. The results indicated that the technology suitable for the high background conditions is based on High Pressure Laminate (HPL) double-gap RPC. The RPC Upgrade Phase II program is planned to be ready after the Long Shutdown 3 (LS3)
High voltage calibration method for the CMS RPC detector
The Resistive Plate Chambers (RPC) are used for muon triggers in the CMS experiment. To calibrate the high voltage working-points (WP) and identify degraded detectors due to radiation or chemical damage, a high voltage scan has been performed using 2017 data from pp collisions at a center-of-mass energy of 13 TeV. In this paper, we present the calibration method and the latest results obtained for the 2017 data. A comparison with all scans taken since 2011 is considered to investigate the stability of the detector performance in time
RPC radiation background simulations for the high luminosity phase in the CMS experiment
The high luminosity expected from the HL-LHC will be a challenge for the CMS detector. The increased rate of particles coming from the collisions and the radioactivity induced in the detector material could cause significant damage and result in a progressive degradation of its performance. Simulation studies are very useful in these scenarios as they allow one to study the radiation environment and the impact on detector performance. Results are presented for CMS RPC stations considering the operating conditions expected at the HL-LHC
The CMS RPC detector performance and stability during LHC RUN-2
The CMS experiment, located at the Large Hadron Collider (LHC) in CERN, has a redundant muon system composed by three different gaseous detector technologies: Cathode Strip Chambers (in the forward regions), Drift Tubes (in the central region), and Resistive Plate Chambers (both its central and forward regions). All three are used for muon reconstruction and triggering. The CMS RPC system confers robustness and redundancy to the muon trigger. The RPC system operation in the challenging background and pileup conditions of the LHC environment is presented. The RPC system provides information to all muon track finders and thus contributing to both muon trigger and reconstruction. The summary of the detector performance results obtained with proton-proton collision at root s = 13 TeV during 2016 and 2017 data taking have been presented. The stability of the system is presented in terms of efficiency and cluster size vs time and increasing instantaneous luminosity. Data-driven predictions about the expected performance during High Luminosity LHC (HL-LHC) stage have been reported
CMSRPC efficiency measurement using the tag-and-probe method
We measure the efficiency of CMS Resistive Plate Chamber (RPC) detectors in proton-proton collisions at the centre-of-mass energy of 13 TeV using the tag-and-probe method. A muon from a Z(0) boson decay is selected as a probe of efficiency measurement, reconstructed using the CMS inner tracker and the rest of CMS muon systems. The overall efficiency of CMS RPC chambers during the 2016-2017 collision runs is measured to be more than 96% for the nominal RPC chambers
Measurement of the photon polarization in decays
The photon polarization in transitions is measured for the
first time in radiative b-baryon decays exploiting the unique spin structure of
decays. A data sample corresponding to an
integrated luminosity of collected by the LHCb experiment in
collisions at a center-of-mass energy of is used. The photon
polarization is measured to be , where the first uncertainty is
statistical and the second systematic. This result is in agreement with the
Standard Model prediction and previous measurements in b-meson decays.
Charge-parity breaking effects are studied for the first time in this
observable and found to be consistent with symmetry.Comment: All figures and tables, along with machine-readable versions and any
supplementary material and additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-030.html (LHCb
public pages
Angular analysis of and decays and search for violation
The first full angular analysis and an updated measurement of the decay-rate
asymmetry of the and decays are reported. The analysis uses proton-proton
collision data collected with the LHCb detector at centre-of-mass energies of
7, 8 and 13 TeV. The data set corresponds to an integrated luminosity of 9
fb. The full set of -averaged angular observables and their
asymmetries are measured as a function of the dimuon invariant mass. The
results are consistent with expectations from the standard model and with
symmetry.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-035.html (LHCb
public pages
Searches for rare Bs0 and B 0 decays into four muons
Searches for rare Bs0 and B0 decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fbâ1. Direct decays and decays via light scalar and J/Ï resonances are considered. No evidence for the six decays searched for is found and upper limits at the 95% confidence level on their branching fractions ranging between 1.8 Ă 10â10 and 2.6 Ă 10â9 are set. [Figure not available: see fulltext.
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