3,810 research outputs found
New Particles from Belle
I report recent results on hidden charm spectroscopy from Belle. These
include: observation of a near-threshold enhancement in the omega-J/psi
invariant mass distribution for exclusive B-->K omega J/psi decays; evidence
for the decay X(3872)-->pi+pi-pi0 J/psi, where the pi+pi-pi0 invariant mass
distribution has a strong peak between 750 MeV and the kinematic limit of 775
MeV, suggesting that the process is dominated by the sub-threshold decay
X-->omega J/psi; and the observation of a peak near 3940 MeV in the J/psi
recoil mass spectrum for the inclusive continuum process e+e- --> J/psi X. The
results are based on a study of a 287 fb-1 sample of e+e- annihilation data
collected at center- of-mass energies around the Upsilon(4S) in the Belle
detector at the KEKB collider.Comment: 10 pages 12 figures. Invited talk at the 1st meeting of the APS
Topical Group on Hadronic Physics, Fermilab, October 24-26, 2004; revised to
correct some reference
Transcript of Interview with Sonora Dodd by R. Belle Colver, October 29, 1965
Transcript of interview with Sonora Dodd by R. Belle Colver, concerning the history of Father\u27s Day and the holiday\u27s commercialization.https://digitalcommons.whitworth.edu/fathers-day-correspondence/1144/thumbnail.jp
Sengkarut Resistensi Pembangunan Jakarta: Dinamika Sinergisitas Pembangunan antara Kepentingan Pemerintah dengan Masyarakat
Pembangunan nasional pada dasarnya sangat membutuhkan kesinergian antara masyarakat dan Pemerintah. Masyarakat adalah pelaku utama dalam pembangunan dan Pemerintah berkewajiban untuk mengarahkan, membimbing, serta menciptakan suasana yang menunjang. Kegiatan masyarakat dan kegiatan Pemerintah harus saling menunjang, mengisi, dan melengkapi dalam mewujudkan pembangunan nasional. Namun, implementasi pembangunan yang digencarkan pihak-pihak tertentu kerap tidak menemui titik temu dalam menyelaraskan dua kepentingan yang berbeda, yaitu pihak Pemerintah dan masyarakat. Karena kepentingan yang dirasa berbeda inilah masyarakat menolak pembangunan yang dirasa \u27mengoyak\u27 kepentingan mereka. Penolakan inilah yang diwujudkan dalam resistensi. Pola pembangunan yang bersifat top-down sudah lama dan masih cenderung diterapkan di Indonesia. Pembangunan top-down ini didasarkan pada perencanaan elitis yang sering mengabaikan dan mengeksklusi kepentingan kelas bawah. Hingga saat ini, Indonesia masih mengalami berbagai dinamika pembangunan yang dilakukan berbagai pihak di berbagai wilayah dan daerah yang kerap terjadi, penggusuran mengatasnamakan kepentingan umum dan berdalih demi pembangunan. Contohnya, di Jakarta, dalam setahun tidak hanya ada satu, dua, tetapi bahkan belasan kasus penggusuran. Berdasarkan catatan Lembaga Bantuan Hukum Jakarta, terjadi 113 kasus penggusuran pada tahun 2015
EXAMINING THE INFLUENCE OF PARENTS, TEACHERS, AND NEIGHBORHOOD SAFETY ON AFRICAN AMERICAN ADOLESCENTS’ MOTIVATION AND ACHIEVEMENT
Guided by the theoretical frameworks of Baumrind’s parenting style theory, interpersonal expectations, Self Determination Theory, and self-efficacy, this study examines factors that influence African American students’ GPA and motivation, specifically associations between parents’ and teachers’ control, warmth, and educational expectations and African American adolescents’ GPA, self-efficacy, and intrinsic motivation were examined. The moderating effects of neighborhood safety on the aforementioned associations were also assessed. Using data from the Educational Longitudinal Study of 2002, this study found that parents’ warmth and expectations were positive predictors of all educational variables, while parents control was a negative predictor of GPA and intrinsic motivation. Teachers’ warmth was a positive predictor of GPA and intrinsic motivation, and teachers’ expectations were positive predictor of self-efficacy. Lastly, teachers’ control was a positive predictor of self-efficacy. Neighborhood safety did not moderate associations. Findings suggest that African American students’ academic development can be enhanced by interventions that target relational interactions
The PTI Carbon Star Angular Size Survey: Effective Temperatures and Non-Sphericity
We report new interferometric angular diameter observations of 41 carbon
stars observed with the Palomar Testbed Interferometer (PTI). Two of these
stars are CH carbon stars and represent the first such measurements for this
subtype. Of these, 39 have Yamashita (1972,1975) spectral classes and are of
sufficiently high quality that we may determine the dependence of effective
temperature on spectral type. We find that there is a tendency for the
effective temperature to increase with increasing temperature index by ~120K
per step, starting at T_EFF ~= 2500K for C3,y, although there is a large amount
of scatter about this relationship. Overall, the median effective temperature
for the carbon star sample is found to be 2800 +- 270K, and the median linear
radius is 360 +- 100 R_SUN. We also find agreement on average within 15K with
the T_EFF determinations of Bergeat (2001,2002a,b), and a refinement of carbon
star angular size prediction based on V & K magnitudes is presented that is
good to an rms of 12%. A subsample of our stars have sufficient {u,v} coverage
to permit non-spherical modeling of their photospheres, and a general tendency
for detection of statistically significant departures from sphericity with
increasing signal-to-noise of the interferometric data is seen. The
implications of most - and potentially all - carbon stars being non-spherical
is considered in the context of surface inhomogeneities and a rotation-mass
loss connection.Comment: 59 pages, 15 figures, 6 tables; accepted for publication in Ap
Supersymmetric Contributions to Bs->K+K-
Inspired by the existing calculation of B->piK decays in supersymmetry
(SUSY), we evaluate the dominant SUSY contributions to Bs->K+K-. We show that
the observables of this process can be significantly modified in the presence
of SUSY. In particular, the branching ratio can be increased considerably
compared to the prediction of the standard model (SM). The effect is even more
dramatic for the CP-violating asymmetries A_dir and A_mix. These asymmetries,
expected to be small in the SM (A_dir is predicted to take only positive
values), change drastically with SUSY contributions. The measurement of these
observables can therefore be used to detect the presence of physics beyond the
SM, and put constraints on its parameters.Comment: 17 pages, 2 figures. This new version contains one added reference
and some minor style change
A Uniform Description of the States Recently Observed at B-factories
The newly found states Y(4260), Y(4361), Y(4664) and Z(4430) stir broad
interest in the study of spectroscopy in a typical charmonium scale. The
Y(4260) which was observed earlier has been interpreted as hybrid, molecular
state, and baryonium, etc. In this note we show for the first time that these
new structures, which are hard to be interpreted as charmonium states, can be
systematically embedded into an extended baryonium picture. According to this
assignment, the so far known characters of these states are understandable.
And, in the same framework, we make some predictions for experimenters to
measure in the future.Comment: 6 pages in Latex. to appear in J.Phys.
Dynamical mass of the O-type supergiant in Zeta Orionis A
A close companion of Zeta Orionis A was found in 2000 with the Navy Precision
Optical Interferometer (NPOI), and shown to be a physical companion. Because
the primary is a supergiant of type O, for which dynamical mass measurements
are very rare, the companion was observed with NPOI over the full 7-year orbit.
Our aim was to determine the dynamical mass of a supergiant that, due to the
physical separation of more than 10 AU between the components, cannot have
undergone mass exchange with the companion. The interferometric observations
allow measuring the relative positions of the binary components and their
relative brightness. The data collected over the full orbital period allows all
seven orbital elements to be determined. In addition to the interferometric
observations, we analyzed archival spectra obtained at the Calar Alto, Haute
Provence, Cerro Armazones, and La Silla observatories, as well as new spectra
obtained at the VLT on Cerro Paranal. In the high-resolution spectra we
identified a few lines that can be associated exclusively to one or the other
component for the measurement of the radial velocities of both. The combination
of astrometry and spectroscopy then yields the stellar masses and the distance
to the binary star. The resulting masses for components Aa of 14.0 solar masses
and Ab of 7.4 solar masses are low compared to theoretical expectations, with a
distance of 294 pc which is smaller than a photometric distance estimate of 387
pc based on the spectral type B0III of the B component. If the latter (because
it is also consistent with the distance to the Orion OB1 association) is
adopted, the mass of the secondary component Ab of 14 solar masses would agree
with classifying a star of type B0.5IV. It is fainter than the primary by about
2.2 magnitudes in the visual. The primary mass is then determined to be 33
solar masses
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