66 research outputs found
Balancing selection response and inbreeding by including predicted stabilised genetic contributions in selection decisions
Balancing selection response and inbreeding by including predicted stabilised genetic contributions in selection decisions
International audienc
Investigating Children’s Spiritual Experiences through the Health and Physical Education (HPE) Learning Area in Australian Schools
Higher-order multipole amplitudes in charmonium radiative transitions
Using 24 million decays in CLEO-c, we have searched
for higher multipole admixtures in electric-dipole-dominated radiative
transitions in charmonia. We find good agreement between our data and
theoretical predictions for magnetic quadrupole (M2) amplitudes in the
transitions and ,
in striking contrast to some previous measurements. Let and
denote the normalized M2 amplitudes in the respective aforementioned decays,
where the superscript refers to the angular momentum of the . By
performing unbinned maximum likelihood fits to full five-parameter angular
distributions, we determine the ratios and , where
the theoretical predictions are independent of the charmed quark magnetic
moment and are and .Comment: 32 pages, 7 figures, acceptance updat
Clinical course and prognosis of the lymphoproliferative disease of granular lymphocytes. A multicenter study.
Lymphoproliferative disease of granular lymphocytes (LDGL) is a recently recognized, relatively rare atypical lymphocytosis characterized by the presence of over 2000 lymphocytes with cytoplasmic azurophilic granules/mm3 in the peripheral blood. The clinical course is heterogeneous, varying from spontaneous regression to progressive, malignant disease. As a consequence, clinical intervention is not standardized. In a worldwide multicenter study, the authors observed 151 patients with LDGL for a mean follow-up time of 29 months. Forty-three patients were asymptomatic at the time of diagnosis. In the remaining cases, clinical symptoms included fever (41 cases), infections (58), neutropenia (47), anemia (17), and thrombocytopenia (12). In 69 cases, LDGL coexisted with an associated disease. Most patients had a nonprogressive clinical course despite the presence of severe symptoms. In 19 patients, death related to LDGL occurred within 48 months. The authors investigated which features at diagnosis were significantly associated with increased mortality. In the univariate analysis, lymph node and liver enlargement, fever at presentation, skin infiltration, a low (less than or equal to 5000/mm3) or high (greater than 20,000/mm3) peripheral leukocyte count, relatively low (less than or equal to 3000) or high (greater than 7000/mm3) absolute peripheral granular lymphocyte (GL) count, and a low (less than or equal to 15%) percentage of HNK-1-positive cells were found to be predictors of increased mortality. In the multivariate analysis, significant independent predictors were fever at diagnosis, a low (less than or equal to 15%) percentage of HNK-1-positive peripheral blood mononuclear cells (PBMC) and a relatively low (less than or equal to 3000) GL count. These results showed that about 25% of the patients with LDGL were diagnosed after a routine blood count and had no clinical symptoms. The remaining patients were symptomatic, with some experiencing a fatal clinical course. The author's analysis of the significant prognostic features of LDGL may help in understanding the heterogeneous nature of this syndrom
Search for CP violation in decays
A model-independent search for direct CP violation in the Cabibbo suppressed
decay in a sample of approximately 370,000 decays is
carried out. The data were collected by the LHCb experiment in 2010 and
correspond to an integrated luminosity of 35 pb. The normalized Dalitz
plot distributions for and are compared using four different
binning schemes that are sensitive to different manifestations of CP violation.
No evidence for CP asymmetry is found.Comment: 13 pages, 8 figures, submitted to Phys. Rev.
First observation of Bs -> D_{s2}^{*+} X mu nu decays
Using data collected with the LHCb detector in proton-proton collisions at a
centre-of-mass energy of 7 TeV, the semileptonic decays Bs -> Ds+ X mu nu and
Bs -> D0 K+ X mu nu are detected. Two structures are observed in the D0 K+ mass
spectrum at masses consistent with the known D^+_{s1}(2536) and
$D^{*+}_{s2}(2573) mesons. The measured branching fractions relative to the
total Bs semileptonic rate are B(Bs -> D_{s2}^{*+} X mu nu)/B(Bs -> X mu nu)=
(3.3\pm 1.0\pm 0.4)%, and B(Bs -> D_{s1}^+ X munu)/B(Bs -> X mu nu)= (5.4\pm
1.2\pm 0.5)%, where the first uncertainty is statistical and the second is
systematic. This is the first observation of the D_{s2}^{*+} state in Bs
decays; we also measure its mass and width.Comment: 8 pages 2 figures. Published in Physics Letters
Evidence for Decays of h_c to Multi-Pion Final States
Using a sample of 2.59 x 10^7 psi(2S) decays collected by the CLEO--c
detector, we present results of a search for the decay chain psi(2S) -> pi^0
h_c, h_c -> n(pi^+ pi^-) pi^0, n=1,2,3. We observe no significant signals for
n=1 and n=3 and set upper limits for the corresponding decay rates. First
evidence for the decay h_c {\o}pi^+ pi^- pi^+ pi^- pi^0 is presented, and a
product branching fraction of B(psi(2S) -> h_c) x B(h_c -> 2(pi^+ pi^-)
pi^0)=1.88^{+0.48+0.47}_{-0.45-0.30} x 10^{-5} is measured. This result implies
that h_c -> hadrons and h_c -> gamma eta_c have comparable rates, in
agreement with expectations.Comment: Available through http://www.lns.cornell.edu/public/CLNS/, submitted
to Phys. Rev. D. (Rapid Communications
Measurements of D Meson Decays to Two Pseudoscalar Mesons
Using data collected on the psi(3770) resonance and near the Ds*+ Ds- peak
production energy by the CLEO-c detector, we study the decays of the possible
D->PP modes and report measurements of or upper limits on all branching
fractions for Cabibbo-favored, singly-Cabibbo-suppressed, and
doubly-Cabibbo-suppressed D->PP decays except modes involving K0L (and except
D0->K+ pi-). We normalize with respect to the Cabibbo-favored D modes, D0->K-
pi+, D+->K- pi+ pi+, and Ds+->K+ K0S.Comment: 11 pages, 2 figures, available through
http://www.lns.cornell.edu/public/CLNS/, submitted to PR
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