27,913,810 research outputs found
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Correspondence: Moses S. Belton
No full textSeries 1, Director of Public Relations Moses S. Belton records includes correspondence, reports, articles, pamphlets, clippings, and related materials of Johnson C. Smith University's Development Office under Director of Public Relations Moses S. Belton.
Moses S. Belton graduated from Johnson C. Smith with majors in mathematics and philosophy in 1933, and from the Theology program in 1936. He returned professionally to Johnson C. Smith in 1942 to serve as Associate Dean of Men. Belton was best known in his role as the first full time Director of Public Relations at the university, a position he served in from 1950-1970. Belton retired from Johnson C. Smith in 1974.
The bulk of records in this series date from the 1960s, and primarily consist of correspondence between Belton and Development Office staff, and current and prospective students; scholarship, loan, and award recipients; non-profit and religious organizations; alumni; and the press. Also included in this series are Public Relations office publications and biographical information about Moses S. Belton.
Johnson C. Smith (JCSU) is a private, four-year research university located in Charlotte, NC, and is a historically black college. It was founded in 1867 as the Biddle Memorial Institute.Digitization made possible by funding from the federal Institute of Museum and Library Services (IMLS) under the provisions of the Library Services and Technology Act as administered by the State Library of North Carolina, a division of the Department of Cultural Resources
Dissection of c-myc domains involved in S phase induction of NIH 3T3 fibroblasts
No full textThe product of the c-myc proto-oncogene is an important regulator of cell proliferation and apoptosis in murine fibroblasts. Addition of the tumor promoter, phorbol myristate acetate (PMA), prevents apoptotic cell death induced by low serum concentrations in NIH3T3 cells that constitutively express and are transformed by v-myc. The protective effect of PMA allowed us to analyse the ability of normal c-Myc and Myc deletion mutants to induce serum starved, untransformed NIH3T3 cells to enter S phase. By microinjecting these quiescent cells with wild type and mutant human c-myc plasmids, we showed that full length c-myc is able to induce S phase entry in presence of PMA, but that c-Myc mutants that delete amino acids delta 7/91, delta 41/53, delta 56/103, delta 106/143, delta 265/317 and delta 414/433 are totally inactive. c-Myc did not shorten the period before entry into S phase, since Myc overexpressing cells entered S phase with the same kinetics as control cells when both were stimulated with 20% fetal calf serum (FCS). However, c-Myc overexpression did increase the percentage of cells entering S phase when these cells were stimulated with 2% fetal calf serum. Interestingly, this ability to enhance stimulation by a suboptimal concentration of FCS was retained to a significant degree by Myc mutants that delete amino acids delta 41/53, delta 56/103 or delta 265/317. Finally, Myc mutants that delete delta 106/143 or delta 414/433 exerted a dominant negative effect on S phase entry both in quiescent cells stimulated with 2% FCS and in unsynchronized, cycling cells
Correspondence: Moses S. Belton
No full textSeries 1, Director of Public Relations Moses S. Belton records includes correspondence, reports, articles, pamphlets, clippings, and related materials of Johnson C. Smith University's Development Office under Director of Public Relations Moses S. Belton.
Moses S. Belton graduated from Johnson C. Smith with majors in mathematics and philosophy in 1933, and from the Theology program in 1936. He returned professionally to Johnson C. Smith in 1942 to serve as Associate Dean of Men. Belton was best known in his role as the first full time Director of Public Relations at the university, a position he served in from 1950-1970. Belton retired from Johnson C. Smith in 1974.
The bulk of records in this series date from the 1960s, and primarily consist of correspondence between Belton and Development Office staff, and current and prospective students; scholarship, loan, and award recipients; non-profit and religious organizations; alumni; and the press. Also included in this series are Public Relations office publications and biographical information about Moses S. Belton.
Johnson C. Smith (JCSU) is a private, four-year research university located in Charlotte, NC, and is a historically black college. It was founded in 1867 as the Biddle Memorial Institute.Digitization made possible by funding from the federal Institute of Museum and Library Services (IMLS) under the provisions of the Library Services and Technology Act as administered by the State Library of North Carolina, a division of the Department of Cultural Resources
Correspondence: Moses S. Belton
No full textSeries 1, Director of Public Relations Moses S. Belton records includes correspondence, reports, articles, pamphlets, clippings, and related materials of Johnson C. Smith University's Development Office under Director of Public Relations Moses S. Belton.
Moses S. Belton graduated from Johnson C. Smith with majors in mathematics and philosophy in 1933, and from the Theology program in 1936. He returned professionally to Johnson C. Smith in 1942 to serve as Associate Dean of Men. Belton was best known in his role as the first full time Director of Public Relations at the university, a position he served in from 1950-1970. Belton retired from Johnson C. Smith in 1974.
The bulk of records in this series date from the 1960s, and primarily consist of correspondence between Belton and Development Office staff, and current and prospective students; scholarship, loan, and award recipients; non-profit and religious organizations; alumni; and the press. Also included in this series are Public Relations office publications and biographical information about Moses S. Belton.
Johnson C. Smith (JCSU) is a private, four-year research university located in Charlotte, NC, and is a historically black college. It was founded in 1867 as the Biddle Memorial Institute.Digitization made possible by funding from the federal Institute of Museum and Library Services (IMLS) under the provisions of the Library Services and Technology Act as administered by the State Library of North Carolina, a division of the Department of Cultural Resources
Prompt charm production in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV
No full textCharm production at the LHC in pp collisions at s√=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, D+s→ϕ(K−K+)π+, Λ+c→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0<pT<8 GeV/c and 2.0<y<4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above pT-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives
σ(cc¯)pT<8 GeV/c,2.0<y<4.5=1419±12(stat)±116(syst)±65(frag) μb,
where the uncertainties are statistical, systematic, and due to the fragmentation functions
Study of B c + → J / ψ D s + and B c + → J / ψ D s ∗ + decays in pp collisions at s = 13 TeV with the ATLAS detector
No full textAbstract
A study of
B
c
+
→
J
/
ψ
D
s
+
and
B
c
+
→
J
/
ψ
D
s
∗
+
decays using 139 fb−1 of integrated luminosity collected with the ATLAS detector from
s
= 13 TeV pp collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of the
B
c
+
→ J/ψπ+ decay are measured:
B
B
c
+
→
J
/
ψ
D
s
+
/
B
B
c
+
→
J
/
ψπ
+
= 2.76 ± 0.47 and
B
B
c
+
→
J
/
ψ
D
s
∗
+
/
B
B
c
+
→
J
/
ψπ
+
= 5.33 ± 0.96. The ratio of the branching fractions of the two decays is found to be
B
B
c
+
→
J
/
ψ
D
s
∗
+
/
B
B
c
+
→
J
/
ψ
D
s
∗
+
= 1.93 ± 0.26. For the
B
c
+
→
J
/
ψ
D
s
∗
+
decay, the transverse polarization fraction, Γ±±/Γ, is measured to be 0.70 ± 0.11. The reported uncertainties include both the statistical and systematic components added in quadrature. The precision of the measurements exceeds that in all previous studies of these decays. These results supersede those obtained in the earlier ATLAS study of the same decays with
s
= 7 and 8 TeV pp collision data. A comparison with available theoretical predictions for the measured quantities is presented
Seed source and region effects on growth rate and survival of blue spruce (Picea pungens) Christmas trees in New Jersey
No full textSeedlings from five different seed sources of blue spruce Christmas trees were planted at five sites throughout New Jersey. Two sites in northern New Jersey and one in central New Jersey had significantly higher survival rates than the two in southern New Jersey. Additionally, the two sites in northern New Jersey had significantly faster growth rates than those in southern and central New Jersey. There were no significant differences in survival rates between seed sources. In terms of growth rates, however, seedlings from seeds obtained in Santa Fe National Forest, New Mexico grew significantly faster than seedlings from the other seed sources tested. This forther growth rate is predicted to shorten the time needed to reach marketability size by one to five years
Measurement of the inclusive φ cross-section in pp collisions at √s=7 TeV
No full textThe cross-section for inclusive φ meson production in pp collisions at a centre-of-mass energy of √s = 7 TeV has been measured with the LHCb detector at the Large Hadron Collider. The differential cross-section is measured as a function of the φ transverse momentum pT and rapidity y in the region 0.6< pT <5.0 GeV/c and 2.44< y <4.06. The cross-section for inclusive φ production in this kinematic range is σ(pp→φX)=1758±19(stat) +43−14(syst)±182(scale) μb, where the first systematic uncertainty depends on the pT and y region and the second is related to the overall scale. Predictions based on the Pythia 6.4 generator underestimate the cross-section
Review of “St. Clive:” An Eastern Orthodox Author Looks Back at C. S. Lewis
No full textReview of C. J. S. Hayward, “St. Clive:” An Eastern Orthodox Author Looks Back at C. S. Lewis (Wheaton, Illinois: C. J. S. Hayward Publications, 2000-19). 381 pages. $49.99. ISBN 9781794669956
- …
