Anomaly Cancellation with an Extra Gauge Boson.

Many extensions of the standard model include an extra gauge boson, whose couplings to fermions are constrained by the requirement that anomalies cancel. We find a general solution to the resulting diophantine equations in the plausible case where the chiral fermion content is that of the standard model plus three right-handed neutrinos.

Dissecting multi-photon resonances at the large hadron collider.

We examine the phenomenology of the production, at the 13 TeV Large Hadron Collider (LHC), of a heavy resonance X, which decays via other new on-shell particles n into multi-(i.e. three or more) photon final states. In the limit that n has a much smaller mass than X, the multi-photon final state may dominantly appear as a two-photon final state because the γ s from the n decay are highly collinear and remain unresolved. We discuss how to discriminate this scenario from X → γ γ : rather than discarding non-isolated photons, it is better to relax the isolation criteria and instead form photon jets substructure variables. The spins of X and n leave their imprint upon the distribution of pseudo-rapidity gap Δ Î· between the apparent two-photon states. Depending on the total integrated luminosity, this can be used in many cases to claim discrimination between the possible spin choices of X and n, although the case where X and n are both scalar particles cannot be discriminated from the direct X → γ γ decay in this manner. Information on the mass of n can be gained by considering the mass of each photon jet.

Large hadron collider probe of supersymmetric neutrinoless double-beta-decay mechanism.

In the minimal supersymmetric extension to the standard model, a nonzero lepton number violating coupling lambda(111);(') predicts both neutrinoless double-beta-decay and resonant single slepton production at the LHC. We show that, in this case, if neutrinoless double beta decay is discovered in the next generation of experiments, there exist good prospects to observe single slepton production at the LHC. Neutrinoless double beta decay could otherwise result from a different source (such as a nonzero Majorana neutrino mass). Resonant single slepton production at the LHC can therefore discriminate between the lambda(111);(') neutrinoless double-beta-decay mechanism and others.

Explaining the anomalous CDF (mu)gamma missing- E(T) events with supersymmetry.

The CDF Collaboration recently reported an excess of events in the (mu)gamma missing E(T) (E(T)) channel that disagrees with the standard model prediction. We explain the excess via resonant smuon production with a single dominant R-parity violating coupling lambda'211, in the context of models where the gravitino is the lightest supersymmetric particle. The slepton decays to the lightest neutralino and a muon followed by neutralino decaying to a gravitino and photon. We determine a viable region of parameter space that fits the kinematical distributions of the Run I excess and illustrate the effect by examining the best fit point in detail. We provide predictions for an excess in the E(T) and photon channel at Run I and Run II.

Patient care and nursing practice when staff requirements exceed staff availability.

This study examined the Workload Management System for Nurses at a tertiary-care Army hospital to determine the incongruence between recommended nursing care hours and actual nursing care hours provided. The purpose of the study was to describe patient care and nursing practice when calculated staff requirements exceed actual staff availabilty. The findings of the study indicated that basic nursing care tasks were accomplished; however, professional development activities were sacrificed. The data reveal that nurses do not have the time to grow professionally through research or education, and they are reduced to assembly-line mentality as they go from task to task without being able to care for a patient as a person.

Staff perceptions of their work environment before and six months after an organizational change.

The Insel and Moos' Work Environment Scale (WES) was used to assess the impact that an organizational change would have on the nursing staff perceptions of the work environment. A comparison of before and after the supervisory change indicated that middle management supervisors have little influence on the work environment, since there was essentially no change in any of the WES scales. The working environment showed little cohesion among staff members, the focus on autonomy and self-sufficiency was average, but there was strong pressure to keep up with the never-ending work load, the staff perceived the setting as poorly organized and inefficient, they were unclear as to expectations about rules and procedures, and there was a high degree of control over the workers. An organizational change may not be the answer to the problems if the problems have more to do with the corporate philosophy. It may be time to look at mechanisms that create working environments in which employees actually feel their work is an important contribution to the organization.

Evaluating the effects of a nurse preceptorship programme.

Nurse preceptorship programmes have evolved as a means to ease the turmoil of transition from student nurse to staff nurse. In this era of economic retrenchment, it is possible that such programmes might be eliminated. Conversely, it is also possible that preceptorship programmes represent an important mechanism for recruitment and retention; issues that also pervade the contemporary health care arena. This study was conducted, therefore, to evaluate the transition process of new graduates who participated in a preceptorship programme. While the objective measures used in this investigation did not support the common belief that the transition from student nurse to staff nurse is an emotion-laden experience, the preceptees did verbalize feelings of psychosocial discomfort. Several explanations are proposed to account for these findings, including that the effectiveness of the programme may have sustained the more positive affective states. The authors conclude that preceptorship programmes remain important and necessary interventions to facilitate integrating and enacting the professional nurse role.