5,458 research outputs found
Lifetime and mixing parameters of neutral D mesons and neutral B hadrons in experimental particle physics
A review of recent experimental measurements of the lifetime and mixing
parameters of neutral D and B hadrons is presented. In particular, focus is
given to measurements of D mixing and the Lambda_B lifetime.Comment: Proceedings of CKM2010, the 6th International Workshop on the CKM
Unitarity Triangle, University of Warwick, UK, 6-10 September 201
Measurements of the masses, lifetimes and mixings of B hadrons at the Tevatron
The Tevatron, with p p-bar collisions at sqrt(s)=1.96TeV can produce all
flavors of B hadrons and allows for unprecedented studies in the B physics
sector. The CDF and D0 collaborations have more than 5 fb-1 of data recorded. I
present here a selection of results on the masses, lifetimes and mixings of B
hadrons using between 1.0 and 2.8fb-1 of data.Comment: 5 pages, 3 figures. Proceedings for Recontres de Moriond QCD 2009,
references adde
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Risk management: understanding why is as important as understanding how
The management of risk is a key area within a number of ACCA papers, and exam questions related to this area are common. It is vital that students are able to apply risk management techniques, such as using derivative instruments to hedge against risk, and offer advice and recommendations as required by the scenario in the question. It is also equally important that students understand why corporations manage risk in theory and in practice, because risk management costs money but does it actually add more value to a corporation? This article explores the circumstances where the management of risk may lead to an increase in the value of a corporation
Measurements of the CKM angle gamma using B^+ --> D K^+ decays at LHCb
Of the three angles that make up the CKM matrix, the least well known is
gamma. A precision measurement of this quantity is highly desirable as it forms
one of the arbitrary parameters in the Standard Model. Moreover, this is the
one angle of the CKM triangle that can be determined in channels that occur via
tree-level decays. While loop-level processes could have sensitivity to physics
beyond the standard model, tree level processes are expected to be unaltered.
Hence a measurement of gamma in tree level processes leads to a standard model
benchmark measurement against which other loop-driven measurements can be
compared. The measurements described here are the latest developments from LHCb
involving the decay B^+ --> D K^+, where the D meson is either a D^0 or a
anti-D^0 and the final state of the D meson is accessible from either flavour
state.Comment: Proceedings of the CKM 2012, the 7th International Workshop on the
CKM Unitarity Triangle, University of Cincinnati, USA, 28th September - 2
October 201
Moral imagination or heuristic toolbox? Events and the risk assessment of structured financial products in the financial bubble
The paper uses the example of the failure of bankers and financial managers to understand the risks of dealing in structured financial products, prior to the financial collapse, to investigate how people respond to crises. It focuses on whether crises cause people to challenge their habitual frames by the application of moral imagination. It is proposed that the structure of financial products and their markets triggered the use of heuristics that contributed to the underestimation of risks. It is further proposed that such framing heuristics are highly specialised to specific contexts, and are part of a wider set of heuristics that people carry in their cognitive âadaptive tool boxesâ. Consequently, it is argued, when a crisis occurs the heuristics are not challenged, but are simply put away, and other more appropriate heuristics put to use until a sense of normality returns, and the use of the old heuristics is resumed
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Organisational slack, corporate reputation and financial performance
This discussion paper aims to fill the gap left by the latest research on organisational slack that has been focused on emerging economies or on a single company or on a single industry. Senior executivesâ perceptions that contribute to a measure of corporate reputation are tested as a proxy measure of unabsorbed slack. Disaggregating the components that make up reputation enables the perceptions of a companyâs âability to innovateâ and how efficiently they âuse their corporate assetsâ to also be tested as measures of unabsorbed, perceptual or discretionary slack. The impact of these variables is considered in terms of company performance
CP violation and material interaction of neutral kaons in measurements of the CKM angle using decays where
As measurements of the CKM angle in decays of -hadrons become
increasingly precise, it is important to consider the impact of processes that
affect secondary and tertiary decay products and can contribute to the observed
CP violation. The golden decay mode used to measure is , where . Due to the presence of a
meson in the final state, measurements based on this
mode are affected by neutral kaon CP violation and matter regeneration, and
this study examines the potential size of the impact. Previous studies
determine the impact of kaon CP violation to be a few degrees in size, but make
simplifying assumptions about how experimental measurements are implemented.
These assumptions are lifted in the present study, and the matter regeneration
effect is included for the first time. The results are presented within the
context of measurements to be made using the LHCb and Belle II II
detectors. It is found that the expected biases due to ignoring the effects of
CP violation and matter regeneration in neutral kaons is small and less than
degrees in all experimental scenarios considered.Comment: 15 pages, 5 figures. Updated following journal review, recalculation
of Belle II prediction
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