92 research outputs found
RD53 Collaboration and CHIPIX65 Project for the development of an innovative Pixel Front End Chip for HL-LHC
Full text linkSearch for the doubly charmed baryon Xi+cc
Full text linkA search for the doubly charmed baryon Ξ+
cc in the decay mode Ξ+
cc→ Λ
+
c K−π
+
is performed with a data sample, corresponding to an integrated luminosity of 0.65 fb−1
, of
pp collisions recorded at a centre-of-mass energy of 7 TeV. No significant signal is found in
the mass range 3300–3800 MeV/c2
. Upper limits at the 95% confidence level on the ratio of
the Ξ+
cc production cross-section times branching fraction to that of the Λ
+
c
, R, are given as
a function of the Ξ+
cc mass and lifetime. The largest upper limits range from R < 1.5×10−2
for a lifetime of 100 fs to R < 3.9 × 10−4
for a lifetime of 400 fs
RD53 Collaboration and CHIPIX65 Project for the development of an innovative Pixel Front End Chip for HL-LHC
Full text linkPixel detectors at HL-LHC experiments will be exposed to unprecedented level of radiation and particle flux. This paper describes the program of development of an innovative pixel chip using a CMOS 65nm technology for the first time in HEP community, for experiments with extreme particle rates and radiation at future High Energy Physics colliders. The RD53 collaboration effort is described together with the CHIPIX65 INFN project
The DAMA experiments at Gran Sasso
No full textThe main activities of the DAMA experiments at the Gran Sasso National Laboratory of INFN are briefly summarized
Searching for dark matter particles with scintillators at Gran Sasso: DAMA experiment
No full textA status report of the main DAMA activities is presented. In particular, limits obtained with 115.5 kg NaI(T1) and approximate to 6.5 kg LXe apparata running deeply underground in the Gran Sasso National Laboratory of INFN are discussed. Some by-product results on other topics of underground physics are also summarized
CHIPIX65: Developments on a new generation pixel readout ASIC in CMOS 65 nm for HEP experiments
No full textPixel detectors at HL-LHC experiments or other future experiments are facing new challenges, especially in terms of unprecedented levels of radiation and particle flux. This paper describes the progress made by the CHIPIX65 project of INFN for the development of a new generation readout ASIC using CMOS 65 nm technology
Searching for particle Dark Matter with scintillators at Gran Sasso: DAMA experiments status report
No full textNew limits on cross section vs mass for spin-dependent and spin-independent coupled WIMPs have been reached by using 115.5 kg NaI(Tl) and about 6.5 kg LXe set-up deeply underground in the Gran Sasso National Laboratory of INFN. Improved limits have been also achieved by means of a CaF2(Eu) scintillator. Preliminary results on xenon quenching factor and pulse shape discrimination capability in the few keV region are briefly discussed
CHIPIX65: Developments on a new generation pixel readout ASIC in CMOS 65 nm for HEP experiments
No full textPixel detectors at HL-LHC experiments or other future experiments are facing new challenges, especially in terms of unprecedented levels of radiation and particle flux. This paper describes the progress made by the CHIPIX65 project of INFN for the development of a new generation readout ASIC using CMOS 65 nm technology
Direct search for particle dark matter with scintillators at Gran Sasso: a status report
No full textLow radioactivity large mass scintillators are running at the Gran Sasso National Laboratory of INFN using liquid Kr-free Xenon enriched at 99.55% in 129Xe and NaI(Tl) crystals. A status report on these activities is presented
Design of analog front-ends for the RD53 demonstrator chip
Full text linkThe RD53 collaboration is developing a large scale pixel front-end chip, which will be a tool to evaluate the performance of 65 nm CMOS technology in view of its application to the readout of the innermost detector layers of ATLAS and CMS at the HL-LHC. Experimental results of the characterization of small prototypes will be discussed in the frame of the design work that is currently leading to the development of the large scale demonstrator chip RD53A to be submitted in early 2017. The paper is focused on the analog processors developed in the framework of the RD53 collaboration, including three time over threshold front-ends, designed by INFN Torino and Pavia, University of Bergamo and LBNL and a zero dead time front-end based on flash ADC designed by a joint collaboration between the Fermilab and INFN. The paper will also discuss the radiation tolerance features of the front-end channels, which were exposed to up to 800 Mrad of total ionizing dose to reproduce the system operation in the actual experiment
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