3,543 research outputs found
"Trust meā¦ Iām a counsellorā¦ā: A heuristic exploration of the therapistās ability to trust themselves to work effectively and ethically as a person-centred counsellor, and not to fall in love with clients
A person-centred counsellorās use of self may be seen to include offering a non-possessive, and certainly non-sexual, love. For any practitioner, the question arises as to what underpins conformance to professional codes of ethics, both theoretically and personally. Generally, counselling approaches align with professional prohibitions against sexual activity through some combination of predefined techniques and explicit theoretical exclusion. The person-centred approach avoids the systematic use of techniques and the theory might be considered less explicit, and so maybe demands careful consideration. This research thus considers the underpinning which supports how a therapist can trust themselves not to fall in love with clients, and not to engage in any form of sexual exploitation. The research addresses self-trust through a highly reflexive, heuristic exploration of a therapistās fundamental beliefs. These are discussed in relation to literature on ethics and to counselling theory. What emerges is a greater separation between falling in love and sexual exploitation, supporting a therapistās ability not to engage in unethical activity with clients and opening the way to greater discussion of such concerns within the person-centred arena
Synthesis and crystal structure of calcium hydrogen phosphite, CaHPO3
We thank Kirstie McCombie for collecting the powder pattern, Sarah Ferrandin for collecting the IR spectrum and the EPSRC National Crystallography Service (University of Southampton) for the X-ray data collection. This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science by Los Alamos National Laboratory (Contract DE-AC52ā06ā
N A25396) and Sandia National Laboratories (Contract DE-NA-0003525).Peer reviewedPublisher PD
First observation of Bs0 ā D*s2+XĪ¼-Ī½ decays
Using data collected with the LHCb detector in protonāproton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays B0sāD+sXĪ¼āĪ½ and B0sāD0K+XĪ¼āĪ½ are detected. Two structures are observed in the D0K+ mass spectrum at masses consistent with the known Ds1(2536)+ and Dās22573)+ mesons. The measured branching fractions relative to the total B0s semileptonic rate are B(B0sāDā+s2XĪ¼āĪ½)/B(B0sāXĪ¼āĪ½) = (3.3Ā±1.0Ā±0.4)%, and B(B0sāD+s1XĪ¼āĪ½)/B(B0sāXĪ¼āĪ½) = (5.4Ā±1.2Ā±0.5)%, where the ļ¬rst uncertainty is statistical and the second is systematic. This is the ļ¬rst observation of the Dā+s2 state in B0s decays; we also measure its mass and width
Measurement of the Bs0-Bs0 oscillation frequency Ī“ms in Bs0āDs-(3)Ļ decays
The Bs0-Bs0 oscillation frequency Ī“ms is measured with 36 pb-1 of data collected in pp collisions at s=7TeV by the LHCb experiment at the Large Hadron Collider. A total of 1381 Bs0āDs-Ļ+ and Bs0āDs-Ļ+Ļ-Ļ + signal decays are reconstructed, with average decay time resolutions of 44 fs and 36 fs, respectively. An oscillation signal with a statistical significance of 4.6Ļ is observed. The measured oscillation frequency is Ī“m s=17.63Ā±0.11(stat)Ā±0.02(syst)ps -1
Absolute luminosity measurements with the LHCb detector at the LHC
Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. Using data taken in 2010, LHCb has applied two methods to determine the absolute scale of its luminosity measurements for proton-proton collisions at the LHC with a centre-of-mass energy of 7 TeV. In addition to the classic ''van der Meer scan'' method a novel technique has been developed which makes use of direct imaging of the individual beams using beam-gas and beam-beam interactions. This beam imaging method is made possible by the high resolution of the LHCb vertex detector and the close proximity of the detector to the beams, and allows beam parameters such as positions, angles and widths to be determined. The results of the two methods have comparable precision and are in good agreement. Combining the two methods, an overal precision of 3.5% in the absolute luminosity determination is reached. The techniques used to transport the absolute luminosity calibration to the full 2010 data-taking period are presented
A model-independent Dalitz plot analysis of BĀ±āDKĀ± with DāK0Sh+hā (h=Ļ,K) decays and constraints on the CKM angle Ī³
A binned Dalitz plot analysis of B Ā±āDK Ā± decays, with DāKS0Ļ+Ļ- and DāKS0K+K-, is performed to measure the CP-violating observables x Ā± and y Ā± which are sensitive to the CKM angle Ī³. The analysis exploits 1.0 fb -1 of data collected by the LHCb experiment. The study makes no model-based assumption on the variation of the strong phase of the D decay amplitude over the Dalitz plot, but uses measurements of this quantity from CLEO-c as input. The values of the parameters are found to be x -=(0.0Ā±4.3Ā±1.5Ā±0.6)Ć10 -2, y -=(2.7Ā±5.2Ā±0.8Ā±2.3)Ć10 -2, x +=(-10.3Ā±4.5Ā±1.8Ā±1.4)Ć10 -2 and y +=(-0.9Ā±3.7Ā±0.8Ā±3.0)Ć10 -2. The first, second, and third uncertainties are the statistical, the experimental systematic, and the error associated with the precision of the strong-phase parameters measured at CLEO-c, respectively. These results correspond to Ī³=(44-38+43)Ā°, with a second solution at Ī³āĪ³+180Ā°, and r B=0.07Ā±0.04, where r B is the ratio between the suppressed and favoured B decay amplitudes
First evidence of direct CP violation in charmless two-body decays of Bs0 mesons
Using a data sample corresponding to an integrated luminosity of 0.35āāfb-1 collected by LHCb in 2011, we report the first evidence of CP violation in the decays of Bs0 mesons to KĀ±Ļā pairs, ACP(Bs0āKĻ)= 0.27Ā±0.08(stat)Ā±0.02(syst), with a significance of 3.3Ļ. Furthermore, we report the most precise measurement of CP violation in the decays of B0 mesons to KĀ±Ļā pairs, ACP(B0āKĻ)=-0.088Ā±0.011(stat)Ā±0.008(syst), with a significance exceeding 6Ļ
Strong constraints on the rare decays Bs0 -> Ī¼+Ī¼- and B0 -> Ī¼+Ī¼-
A search for Bs0āĪ¼+Ī¼- and B0āĪ¼+Ī¼- decays is performed using 1.0āāfb-1 of pp collision data collected at ās=7āāTeV with the LHCb experiment at the Large Hadron Collider. For both decays, the number of observed events is consistent with expectation from background and standard model signal predictions. Upper limits on the branching fractions are determined to be B(Bs0āĪ¼+Ī¼-)<4.5(3.8)Ć10-9 and B(B0āĪ¼+Ī¼-)<1.0(0.81)Ć10-9 at 95% (90%) confidence level
Measurement of b-hadron branching fractions for two-body decays into charmless charged hadrons
Based on data corresponding to an integrated luminosity of 0.37 fbā1 collected by the LHCb experiment in 2011, the following ratios of branching fractions are measured: B(B0āĻ+Ļā)/B(B0āK+Ļā)=0.262Ā±0.009Ā±0.017,(fs/fd)ā
B(B0sāK+Kā)/B(B0āK+Ļā)=0.316Ā±0.009Ā±0.019,(fs/fd)ā
B(B0sāĻ+Kā)/B(B0āK+Ļā)=0.074Ā±0.006Ā±0.006,(fd/fs)ā
B(B0āK+Kā)/B(B0sāK+Kā)=0.018+0.008ā0.007Ā±0.009,(fs/fd)ā
B(B0sāĻ+Ļā)/B(B0āĻ+Ļā)=0.050+0.011ā0.009Ā±0.004,B(Ī0bāpĻā)/B(Ī0bāpKā)=0.86Ā±0.08Ā±0.05, where the first uncertainties are statistical and the second systematic. Using the current world average of B(B0āK+Ļā) and the ratio of the strange to light neutral B meson production f s /f d measured by LHCb, we obtain: B(B0āĻ+Ļā)=(5.08Ā±0.17Ā±0.37)Ć10ā6,B(B0sāK+Kā)=(23.0Ā±0.7Ā±2.3)Ć10ā6,B(B0sāĻ+Kā)=(5.4Ā±0.4Ā±0.6)Ć10ā6,B(B0āK+Kā)=(0.11+0.05ā0.04Ā±0.06)Ć10ā6,B(B0sāĻ+Ļā)=(0.95+0.21ā0.17Ā±0.13)Ć10ā6.
The measurements of B(B0sāK+Kā) , B(B0sāĻ+Kā) and B(B0āK+Kā) are the most precise to date. The decay mode B0sāĻ+Ļā is observed for the first time with a significance of more than 5Ļ
Measurement of relative branching fractions of B decays to Ļ(2S) and J/Ļ mesons
The relative rates of B-meson decays into J/Ļ
and Ļ(2S) mesons are measured for the three decay modes
in pp collisions recorded with the LHCb detector. The ratios
of branching fractions (B) are measured to be
B(B
+āĻ(2S)K
+
)
B(B+āJ/ĻK+)
= 0.594Ā±0.006(stat)Ā±0.016(syst)Ā±0.015(RĻ),
B(B0āĻ(2S)K
ā0)
B(B0āJ/ĻKā0)
= 0.476Ā±0.014(stat)Ā±0.010(syst)Ā±0.012(RĻ),
B(B0
s
āĻ(2S)Ļ)
B(B0
s
āJ/ĻĻ)
= 0.489Ā±0.026(stat)Ā±0.021(syst)Ā±0.012(RĻ),
where the third uncertainty is from the ratio of the Ļ(2S)
and J/Ļ branching fractions to Ī¼
+
Ī¼
ā.
1 Introductio
- ā¦