It is estimated that torture occurs in over two thirds of countries in the world. Torture includes a variety of trauma types, both physical and psychological in nature, including beating, burning, ...sexual abusetharassment, humiliation, and death threats, among others. The ramifications can be debilitating, leading to physical symptoms as well as psychological distress. Research with torture survivors has estimated prevalence rates of 14% to 38% for developing PTSD, 14% to 67% for depression, and 17% to 60% for anxiety. This variability in distress may be due in part to multiple risk and resilience factors, which either increase or decrease the likelihood of experiencing distress. The current study sought to investigate the effect of several potential resilience variables (e.g., coping style, social support, cognitive appraisals, and social comparisons) on PTSD, depression, anxiety, and somatization. Furthermore, this study examined whether coping style moderated the relationship between other resilience variables and psychological symptoms. Variables were measured using the Harvard Trauma Questionnaire, Brief Symptom Inventory, Coping Strategies Inventory, Multidimensional Scale of Perceived Social Support, Self Evaluation Scale, and an appraisal measure. Seventy-five torture survivors completed a semi-structured intake interview and completed the above measures at the Bellevue/NYU Program for Survivors of Torture. The majority of participants were West African (50%) and Asian (20%). Results indicated that emotion focused disengagement coping styles and downward social comparisons predicted psychological symptoms. Results did not support hypotheses that social support and cognitive appraisal would buffer distress on their own. However, results indicated that coping style was a significant moderator, as social support was a significant resilience variable if an individual had an emotion focused engaged coping style. Furthermore, emotion focused coping styles moderated some effects of comparisons and appraisals on psychological symptoms. These results indicate that there are several types of coping and resilience variables, and that some variables are more or less effective depending on certain personality characteristics (e.g., coping style). This may help guide evaluation procedures and interventions in a clinical setting. Limitations include cultural and language differences, small sample size, and reliability on one scale.
ECONF C050318:0811,2005 An R&D program on monolithic CMOS pixel sensors for application at the ILC
has been started at LBNL. This program profits of significant synergies with
other R&D activities on ...CMOS pixel sensors. The project activities after the
first semester of the R&D program are reviewed.
We present results for B-meson decay modes involving a charm meson, protons, and pions using 455 x 10^6 BBbar pairs recorded by the BaBar detector at the SLAC PEP-II asymmetric-energy e+ e- collider. ...The branching fractions are measured for the following ten decays: B0bar to D0 p pbar, B0bar to D*0 p pbar, B0bar to D+ p pbar pi-, B0bar to D*+ p pbar pi-, B- to D0 p pbar pi-, B- to D*0 p pbar pi-, B0bar to D0 p pbar pi- pi+, B0bar to D*0 p pbar pi- pi+, B- to D+ p pbar pi- pi-, and B- to D*+ p pbar pi- pi-, The four B- and the two five-body B0bar modes are observed for the first time. The four-body modes are enhanced compared to the three- and the five-body modes. In the three-body modes, the M(p pbar) and M(D(*)0 p) invariant mass distributions show enhancements near threshold values. In the four-body mode B0bar to D+ p pbar pi-, the M(p pi-) distribution shows a narrow structure of unknown origin near 1.5 GeV/c^2. The distributions for the five-body modes, in contrast to the others, are similar to the expectations from uniform phase-space predictions.
The authors report on analyses of tau lepton decays {tau}{sup -} {yields} {eta}K{sup -}{nu}{sub {tau}} and {tau}{sup -} {yields} {eta}{pi}{sup -}{nu}{sub {tau}}, with {eta} {yields} {pi}{sup ...+}{pi}{sup -}{pi}{sup 0}, using 470 fb{sup -1} of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the {Upsilon}(4S) resonance. They measure the branching fraction for the {tau}{sup -} {yields} {eta}K{sup -}{nu}{sub {tau}} decay mode, {Beta}({tau}{sup -} {yields} {eta}K{sup -}{nu}{sub {tau}}) = (1.42 {+-} 0.11(stat) {+-} 0.07(syst)) x 10{sup -4}, and report a 95% confidence level upper limit for the second-class current process {tau}{sup -} {yields} {eta}{pi}{sup -}{nu}{sub {tau}}, {Beta}({tau}{sup -} {yields} {eta}{pi}{sup -}{nu}{sub {tau}}) < 9.9 x 10{sup -5}.
Evidence for the decay X(3872) -> J/\psi\omega del Amo Sanchez, P.; Lees, J.P.; Poireau, V. ...
Physical review. D, Particles, fields, gravitation, and cosmology,
08/2011, Letnik:
82
Journal Article
Odprti dostop
We present a study of the decays B{sup 0,+} --> J/{psi}{pi}{sup +}{pi}{sup -}{pi}{sup 0}K{sup 0,+}, using 467x10{sup 6} B{anti B} pairs recorded with the BABAR detector. We present evidence for the ...decay mode X(3872) --> J/{psi}{omega}, with product branching fractions B(B{sup +} --> X(3872)K{sup +}) x B(X(3872) --> J/{psi}{omega}) = 0.6 {+-} 0.2(stat) {+-} 0.1(syst) x 10{sup -5}, and B(B{sup 0} --> X(3872)K{sup 0}) x B(X(3872) --> J/{psi}{omega}) = 0.6 {+-} 0.3(stat) {+-} 0.1(syst) x 10{sup -5}. A detailed study of the {pi}{sup +}{pi}{sup -}{pi}{sup 0} mass distribution from X(3872) decay favors a negative-parity assignment.
We present an analysis of exclusive charmless semileptonic B-meson decays based on 377 million BBbar pairs recorded with the BABAR detector at the Upsilon(4S) resonance. We select four event samples ...corresponding to the decay modes B0 --> pi- l+ nu, B+ --> pi0 l+ nu, B0 --> rho- l+ nu, and B+ -> rho0 l+ nu, and find the measured branching fractions to be consistent with isospin symmetry. Assuming isospin symmetry, we combine the two pi l nu samples, and similarly the two rho l nu samples, and measure the branching fractions BF(B0 --> pi- l+ nu) = (1.41 +- 0.05 +- 0.07) x 10^-4 and BF(B0 --> rho- l+ nu) = (1.75 +- 0.15 +- 0.27) x 10^-4, where the errors are statistical and systematic. We compare the measured distribution in q^2, the momentum transfer squared, with predictions for the form factors from lattice QCD calculations and light-cone sum rules, and determine the CKM matrix element |V_ub|. From a simultaneous fit to B --> pi l nu data and FNAL/MILC lattice QCD results, we obtain |V_ub| = (2.95 +- 0.31) x 10^-3 from B --> pi l nu, where the uncertainty is the combined experimental and theoretical error.
We report the results of a study of the exclusive charmless semileptonic decays, $B^{+} \rightarrow \eta^{(\prime)} \ell^{+} \nu$ and $B^{0} \rightarrow \pi^{-} \ell^{+} \nu$, undertaken with ...approximately 464 million $\ensuremath{B\kern 0.18em\bar{\kern -0.18em B}}$ pairs collected at the $\Upsilon(4S)$ resonance with the ${{\slshape B\kern-0.1em{\smaller A}\kern-0.1em B\kern-0.1em{\smaller A\kern-0.2em R}}}$ detector. The analysis uses events in which the signal $B$ decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for $B^{+} \rightarrow \eta \ell^{+} \nu$ and $B^{0} \rightarrow \pi^{-} \ell^{+} \nu$ decays in three and twelve bins of $q^2$, respectively, from which we extract the $f_+(q^2)$ form-factor shapes and the total branching fractions ${\ensuremath{\cal B}}(B^{+} \rightarrow \eta \ell^{+} \nu)$ $ = \left(0.36 \pm 0.05_{stat} \pm 0.04_{syst} \right) \times 10^{-4}$ and ${\ensuremath{\cal B}}(B^{0} \rightarrow \pi^- \ell^{+} \nu)$ $ = \left(1.42 \pm 0.05_{stat} \pm 0.08_{syst} \right) \times 10^{-4}$. We also measure ${\ensuremath{\cal B}}(B^{+} \rightarrow \eta^{\prime} \ell^{+} \nu)$ $ = \left(0.24 \pm 0.08_{stat} \pm 0.03_{syst} \right) \times 10^{-4}$. We obtain values for the magnitude of the CKM matrix element $\ensuremath{|V_{ub}|}$ using three different QCD calculations.
We present a measurement of the branching fractions of the 22 decay channels of the B0 and B+ mesons to Dbar(*)D(*)K, where the D(*) and Dbar(*) mesons are fully reconstructed. Summing the 10 neutral ...modes and the 12 charged modes, the branching fractions are found to be B(B0 -> Dbar(*)D(*)K) = (3.68 +- 0.10 +- 0.24)% and B(B+ -> Dbar(*)D(*)K) = (4.05 +- 0.11 +- 0.28)%, where the first uncertainties are statistical and the second systematic. The results are based on 429 fb^-1 of data containing 471.10^6 BBbar pairs collected at the Y(4S) resonance with the BaBar detector at the SLAC National Accelerator Laboratory.
We report on analyses of tau lepton decays $\tau^- \to \eta K^- \nu_{\tau}$ and $\tau^- \to \eta \pi^- \nu_{\tau}$, with $\eta \to \pi^+ \pi^- \pi^0$, using 470 fb$^{-1}$ of data from the Babar ...experiment at PEP-II, collected at center-of-mass energies at and near the $\Upsilon(4S)$ resonance. We measure the branching fraction for the $\tau^- \to \eta K^- \nu_{\tau}$ decay mode, $\Br(\tau^- \to \eta K^- \nu_{\tau}) = (1.42\pm0.11\text{(stat)}\pm0.07\text{(syst)})\times10^{-4}$, and report a 95% confidence level upper limit for the second-class current process $\tau^- \to \eta \pi^- \nu_{\tau}$, $\Br(\tau^- \to \eta \pi^- \nu_{\tau}) < 9.9\times10^{-5}$.
We study the processes gamma gamma -> K^0_S K+/- pi-/+ and gamma gamma -> K+ K- pi+ pi- pi0 using a data sample of 519.2 fb-1 recorded by the BaBar detector at the PEP-II asymmetric-energy e+e- ...collider at center-of-mass energies near the Upsilon(nS) (n = 2,3,4) resonances. We observe the eta_c(1S), chi_c0(1P), chi_c2(1P), and eta_c(2S) resonances produced in two-photon interactions and decaying to K+ K- pi+ pi- pi0, with significances of 18.1, 5.7, 5.2, and 5.3 standard deviations (including systematic errors), respectively. We measure the eta_c(2S) mass and width in K^0_S K+/- pi-/+ decays, m(eta_c(2S))=3638.5 +/- 1.5 +/- 0.8 MeV/c^2 and Gamma(eta_c(2S)) = 13.4 +/- 4.6 +/- 3.2 MeV, where the first uncertainty is statistical and the second is systematic. We search for the Z(3930) resonance and find no significant signal. We also provide the two-photon width times branching fraction values for the observed resonances.
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