A search for the rare decays W+ -> D-s(+)gamma and Z -> D-0 gamma and is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13TeV, ...corresponding to an integrated luminosity of 2.0fb(-1). No significant signal is observed for either decay mode and upper limits on their branching fractions are set using W+ -> mu(+)nu and Z ->mu(+)mu(-)decays as normalization channels. The upper limits are and at 95% confidence level for W+ -> D-s(+)gamma and Z -> D-0 gamma the and decay modes, respectively. This is the first reported search for Z -> D-0 gamma the decay, while the upper limit on the Z -> D-0 gamma branching fraction improves upon the previous best limit.
As we move into the new millennium, it is important that we improve our understanding of radiation effects on humans and nanoelectronic systems. This understanding is essential in a number of areas ...including radiation therapy for cancer treatment and extended human presence in outer space. Nanodosimetry in low-pressure gases enables measurement of the energy deposition of ionizing radiation on a scale equivalent to the dimensions of the DNA molecule. This is extremely important for not only biological applications but also electronic applications, as the effect of radiation on nanoelectronics needs to be determined before they are installed and deployed in complex radiation fields. However, before nanodosimetry can be widely applied, further investigation is required to link the output of gas-based nanodosimeters to the actual effect of the radiation on a biological or electronic system. The purpose of this research is to conduct nanodosimetric measurements of proton radiation fields at the proton accelerator of Loma Linda University Medical Center (LLUMC) and to develop a Monte Carlo simulation system to validate and support further developments of experimental nanodosimetry. To achieve this, measured ion cluster size distributions are compared to the output from the Monte Carlo simulation system that simulates the characteristics of the LLUMC beam line and the performance of the nanodosimeter installed on one of LLUMC's proton research beam lines.
Abstract
The performance of the ring-imaging Cherenkov detectors at
the LHCb experiment is determined during the LHC Run 2 period
between 2015 and 2018. The stability of the Cherenkov angle
...resolution and number of detected photons with time and running
conditions is measured. The particle identification performance is
evaluated with data and found to satisfy the requirements of the
physics programme.
The position- and energy-sensitive primary particle detectors of a nanodosimetry system are described. They consist of a telescope of silicon strip detectors, which allow the determination of the ...particle's position from the hit strip address and its energy from the specific energy loss. In our implementation, the energy loss is measured through the time over threshold (TOT). When testing the performance of a single silicon strip detector, it was found that between the energies of 20 and 100 MeV, primary particle energy could be determined to an accuracy of 15%, decreasing to 25% at 250 MeV Below 20 MeV, we observed TOT saturation. It is concluded that the performance of the tested silicon strip detector is suitable for application in nanodosimetry.
The position- and energy-sensitive primary particle detectors of a nanodosimetry system are described. They consist of a telescope of silicon strip detectors, which allow the determination of the ...particle's position from the hit strip address and its energy from the specific energy loss. In our implementation, the energy loss is measured through the time-over-threshold.
BaBar silicon vertex tracker: Status and prospects Re, V.; Bondioli, M.; Bruinsma, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
12/2006, Letnik:
569, Številka:
1
Journal Article
Status and prospects of the BaBar SVT Re, V.; Bruinsma, M.; Curry, S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
05/2006, Letnik:
560, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The
BaBaR Silicon Vertex Tracker (SVT) has been efficiently operated for five years since the start of data taking in 1999. It has met design requirements and no degradation in its performance has ...been observed thus far. However, because of higher than expected background levels, and anticipated further increases in luminosity and dose rates, we have done a thorough study to assess the viability of operating the SVT until the end of the decade.
The performance of the ring-imaging Cherenkov detectors at the LHCb experiment is determined during the LHC Run 2 period between 2015 and 2018. The stability of the Cherenkov angle resolution and ...number of detected photons with time and running conditions is measured. The particle identification performance is evaluated with data and found to satisfy the requirements of the physics programme.
Health Insurance Portability and Accountability Act (HIPAA) risks are a critical concern when ancillary departments or physician practices release patient information. On December 2, 2019, the Office ...for Civil Rights (OCR) at the U.S. Department of Health and Human Services announced its second enforcement action and settlement under its HIPAA Right of Access Initiative.2 For the health care organization at fault, failure to provide timely access to records requested by a third party resulted in corrective actions and a fine of $85,000. Radiology-Reports, digitized images, and films are requested by: * Other providers for continuing care * Attorneys to support injury claims * Patients for specialists and referrals Business office-High volumes of PHI are sent by billers and collectors, including: * Unsolicited releases during initial claims submission and claims processing to expedite payment * Disclosures for government and commercial payer audits and reviews * Attorney requests for itemized bills Physician practices-To fulfill their duties, office managers may give information without proper authorizations, including responses to the following: * Patient requests a copy of their chart following an office visit * Family requests a copy of chart * Other providers reque st information Endnotes 1.
PDF
