544 research outputs found
Luminosity determination in pp collisions with the ATLAS detector at LHC
No full textResults of the luminosity measurements with the ATLAS detector
at LHC in pp collisions at (s) = 7 TeV in 2011 are presented. Several luminosity
monitors are calibrated in dedicated runs and their long-term stability and accuracy
are evaluated. A final luminosity uncertainty of δL/L = ±3.7% is reached
Measurement of pp inelastic cross section at √s = 7TeV at LHC
No full textpp interactions can be cathegorized, according to their final state, as elastic, diffractive inelastic and inelastic. If the mass of the final state is small (Mx < 15 GeV) the event escapes undetected. Both CMS and ATLAS measured the total inelastic cross section for Mx greater than 15.7GeV with good precision and then extrapolated it to the full mass range using Monte Carlo models. The results
of the total inelastic pp cross section at √s = 7TeV and the extrapolated value are here presented for both experiments. The ATLAS measurement of the inelastic cross section as a function of the rapidity gap, used to tune the MC simulations in the low mass region, is also presented
A wireless transmission low-power radiation sensor for in vivo dosimetry
No full textThe aim of the paper is to illustrate the design and the performance of a microelectronic circuit composed of a dosimeter, an oscillator, a modulator, a transmitter and an antenna. The device was designed for specific in vivo dosimetry applications. However, the layout area of less than 1 mm2 makes it suitable for a large variety of applications, from spot radiation monitoring systems in medicine to accurate measurements of radiation level in high-energy physics experiments. Moreover, due to its extremely low-power budget, it might be also of interest for space applications. The chip embeds a re-programmable floating-gate transistor configured as a radiation sensor and a read-out circuit. Prototype chips have been fabricated and tested exploiting a commercial 180 nm, four-metal CMOS technology. Characterization tests of the performance of the Ultra-Wide Band transmission are summarized. The dosimeter prototype has an estimated sensitivity of 1 mV/rad within a total absorbed dose range up to 10 krad. The read-out circuit is powered with 3.3 V and the total power consumption is very low, i.e. about 165 μW, making it also upgradable with a remote power system
Business Model disclosure in mandatory and voluntary corporate reports: An empirical analysis
No full textDriven by the increasing demand for external communication on how a business creates value, the theme of Business Model (BM) disclosure in mandatory and voluntary corporate reporting draws the attention of the academic community, accounting profession, and regulators. Despite this interest and the relevance that BM assumes both in financial reporting and in the specific regulations of non-financial information (e.g., UK Corporate Governance Code, EU Directive 2014/95), very little is still known about the BM disclosure practice. This paper examines the corporate BM awareness and disclosure by analysing the annual and voluntary reports of 86 publicly listed firms. We performed a computer-assisted content analysis to investigate corporate reporting practices and to verify the presence of the components of BM identified in the literature. The first results show a substantial knowledge of the concept of BM by the firms, but their reporting practice is unclear. Even though companies seem to be aware of their BM, very few reports provide users with a dedicated section to explain how they create value. Additionally, companies choose to disclose only some aspects of BM, hiding information related to the organisation of activities, their value proposition, and their future performance and strategy. The reporting practices are still anchored to old schemas with the prevalence of quantitative, financial, and historical information
Forward detectors at ATLAS
No full textThe main characteristics and performances of forward detectors at ATLAS are presented as well as their use in forward physics
Small-x and Forward Measurements in ATLAS
No full textAfter a description of the forward detectors in ATLAS, the performances on the luminosity measurements during 2010 data taking are presented as well as some ideas on the use of the forward detetors as trigger for diffractive physics
Test of the Higgs boson couplings with LHC and Tevatron data
No full textTest of the Higgs boson couplings with LHC and Tevatron dat
Search for W W/W Z resonance production in lνqq final states in pp collisions at s√=13 TeV with the ATLAS detector
No full textA search is conducted for new resonances decaying into a W W or W Z boson pair, where one W boson decays leptonically and the other W or Z boson decays hadronically. It is based on proton-proton collision data with an integrated luminosity of 36.1 fb−1 collected with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of s√=13 TeV in 2015 and 2016. The search is sensitive to diboson resonance production via vector-boson fusion as well as quark-antiquark annihilation and gluon-gluon fusion mechanisms. No significant excess of events is observed with respect to the Standard Model backgrounds. Several benchmark models are used to interpret the results. Limits on the production cross section are set for a new narrow scalar resonance, a new heavy vector-boson and a spin-2 Kaluza-Klein graviton
- …
