5,180 research outputs found
The Higgs System in and Beyond the Standard Model
After the discovery of the Higgs boson particle on the 4th of July of 2012 at
the Large Hadron Collider, sited at the european CERN laboratory, we are
entering in a fascinating period for Particle Physics where both theorists and
experimentalists are devoted to fully understand the features of this new
particle and the possible consequences for High Energy Physics of the Higgs
system both within and beyond the Standard Model of fundamental particle
interactions. This paper is a summary of the lectures given at the third IDPASC
school (Santiago de Compostela, Feb. 2013, Spain) addressed to PhD students,
and contains a short introduction to the main basic aspects of the Higgs boson
particle in and beyond the Standard Model.Comment: 62 pages, 31 figures, Lectures of the IDPASC School at Santiago de
Compostela, Spain, February 201
Comment on `Glassy Transition in a Disordered Model for the RNA Secondary Structure'
In cond-mat/9907125 the low-temperature behavior of a model for RNA secondary
structure was studied. It is claimed that the model exhibits a breaking of the
replica symmetry, since the width of the distribution P(q) of overlaps may
converge to a finite value at T=0. The authors used an exact enumeration method
to obtain all ground states for a given RNA sequence. Because of the
exponential growing degeneracy, only sequences up to length L=256 could be
studied.
Here it is shown that, in contrast to the previous results, by going to much
larger sizes as L=2000 the variance coverges towards zero, i.e. P(q) is a
delta-function in the thermodynamic limit.Comment: completely rewritten, comment to cond-mat/9907125 (PRL 84, 2026
‘At what cost? the impact of UK long-term care funding policies on social work practice with older people’: a literature review
Moving to a care home is a significant and often costly milestone in many older people’s lives, with considerable implications for an individual’s future autonomy, safety, wellbeing and security. Such provision has considerable financial impact both on the economy and on those required to make significant contributions to their own care. Reductions in community-based support and widespread gaps in the sustainable development of alternative options to residential care pose challenges in relation to decision making for those older people and their carers who wish to make timely plans for good quality provision. The system and process of transfer to care can also be fragmented, bewildering and involve multiple organisations and assessments, often at a time of crisis. Social Workers are key professionals in providing assessment, advocacy and planning with older people and their carers and the challenging neo-liberal policy context suggests the potential for numerous ethical dilemmas for practitioners. This paper examines themes from recent literature in the field of social work with vulnerable older people, particularly in relation to funding arrangements for residential care, examining how ethical issues in this field of social work practice are. identified and discussed. This paper presents a narrative review of relevant literature since 2010. It examines and synthesises key themes and considers how ethical issues connected to this field of social work practice are articulated
Naturalness and Higgs Decays in the MSSM with a Singlet
The simplest extension of the supersymmetric standard model - the addition of
one singlet superfield - can have a profound impact on the Higgs and its
decays. We perform a general operator analysis of this scenario, focusing on
the phenomenologically distinct scenarios that can arise, and not restricting
the scope to the narrow framework of the NMSSM. We reexamine decays to four b
quarks and four tau's, finding that they are still generally viable, but at the
edge of LEP limits. We find a broad set of Higgs decay modes, some new,
including those with four gluon final states, as well as more general six and
eight parton final states. We find the phenomenology of these scenarios is
dramatically impacted by operators typically ignored, specifically those
arising from D-terms in the hidden sector, and those arising from weak-scale
colored fields. In addition to sensitivity of m_Z, there are potential tunings
of other aspects of the spectrum. In spite of this, these models can be very
natural, with light stops and a Higgs as light as 82 GeV. These scenarios
motivate further analyses of LEP data as well as studies of the detection
capabilities of future colliders to the new decay channels presented.Comment: 3 figures, 1 appendix; version to appear in JHEP; typos fixed and
additional references and acknowledgements adde
The multifaceted nature of weight-related self-stigma: Validation of the two-factor weight bias internalization scale (WBIS-2F)
This is the final version. Available from Frontiers Media via the DOI in this record.Internalized weight stigma (IWS) is generally operationalized as self-devaluation due to weight in higher-weight individuals. The most commonly used measure of IWS, the Weight Bias Internalization Scale (WBIS), was developed from an original pool of 19 items. Item selection was guided by statistical techniques based upon an a priori hypothesized unidimensional factor structure. The resulting 11-item scale mostly assesses appearance-related attitudes, fear of stigma, affect, and desire for change, all of which may be a natural response to societal weight stigma, even in the absence of self-devaluation. Items pertaining to self-blame, stigma awareness, perceived legitimacy of weight stigma, and most items pertaining to self-worth, were excluded from the final scale. It is unclear whether an a priori assumption of multi-dimensionality would have produced different results. Methods: Exploratory and confirmatory factor analysis of the original 19-item questionnaire was conducted in 931 higher-weight individuals. Results: A 13-item two-factor structure was identified. Factor 1 comprised seven items that could be loosely conceived as weight-related distress. Factor 2 comprised six items, all of which pertained to weight-related self-worth. Tested individually, the six items making up the self-devaluation factor were an excellent fit for the data on all fit indices. Conclusion: IWS is a multi-dimensional construct. The two-factor WBIS (WBIS-2F) provides options to explore the relationships between different aspects of IWS and upstream and downstream variables. The Self-Devaluation subscale is suitable for standalone use when weight-related self-devaluation per se is the construct of interest.Economic and Social Research Council (ESRC
Design rules and guidelines for generic condition-based maintenance software's Graphic User Interface
The task of selecting and developing a method of Human Computer Interaction (HCI) for a
Condition Based Maintenance (CBM) system, is investigated in this thesis. Efficiently and
accurately communicating machinery health information extracted from Condition
Monitoring (CM) equipment, to aid and assist plant and machinery maintenance decisions,
is the crux of the problem being researched.
Challenges facing this research include: the multitude of different CM techniques,
developed for measuring different component and machinery condition parameters; the
multitude of different methods of HCI; and the multitude of different ways of
communicating machinery health conditions to CBM practitioners. Each challenge will be
considered whilst pursuing the objective of identifying a generic set of design and
development principles, applicable to the design and development of a CBM system's
Human Machine Interface (HMI). [Continues.
The Triple Higgs Boson Self-Coupling at Future Linear e+e- Colliders Energies: ILC and CLIC
We analyzed the triple Higgs boson self-coupling at future
colliders energies, with the reactions . We evaluate the total cross-sections for both and ,
and calculate the total number of events considering the complete set of
Feynman diagrams at tree-level. We vary the triple coupling
within the range and +2. The numerical
computation is done for the energies expected to be available at a possible
Future Linear Collider with a center-of-mass energy and a luminosity 1000 . Our analysis is also extended to a
center-of-mass energy 3 and luminosities of 1000 and 5000
. We found that for the process , the
complete calculation differs only by 3% from the approximate calculation
, while for the process , the expected number of events, considering the decay products of both
and , is not enough to obtain an accurate determination of the triple Higgs
boson self-coupling.Comment: 19 pages, 12 figure
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