33,991 research outputs found
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Letter from B. F. Gavin (for Carl Hayden) to Stephen Mather, National Park Service
No full textLetter from Mrs. B. F. Gavin to Stephen Mather regarding the sale of Bass properties to the Santa Fe Railroad Company
Macroderes oreatus Abdalla & Deschodt & Scholtz & Sole 2018, new species
No full text<i>Macroderes oreatus</i> Abdalla & Deschodt, new species <p>(Figs. 19, 36, 78, 86, 96)</p> <p>urn:lsid:zoobank.org:act: D2AC74D3-5FC1-4996-9F28-0C4C8BBA3D66</p> <p> <i>Macroderes</i> sp.: Sole & Scholtz 2010: 636.</p> <p> <b>Type locality.</b> Armmanshoek, Richtersveld NP, 28.41756°S 17.07902°E.</p> <p> <b>Type material.</b> Holotype: ♂ (TMSA): “Armmanshoek / Richtersveld NP / S28.41756° E17.07902° / 13.iv.2005 / 623 m / C. Deschodt & A. Deschodt [printed] // HOLOTYPE / <i>Macroderes oreatus</i> / Abdalla & Deschodt / 2018 [red label, printed]”; Paratypes: 5 ♀ f #, same data as holotype, 1♀ (TMSA), 2♀♀ (UPSA), 2♀♀ (SANC).</p> <p> <b>Holotype description.</b> Holotype, ♂ (Fig. 19). Body length 7.2 mm, width 4.9 mm. Specimen is teneral.</p> <p> <b>Head.</b> Genae right-angled. Frontal suture very distinct, curving slightly, no tubercle. Genal sutures barely discernible. Dorsal surface of clypeus behind frontal suture punctate punctures small, irregular and separated by 1– 3 puncture diameters, gradually becoming rugose proximally.</p> <p> <b>Pronotum.</b> Convex, lateral margins round. Anterior lateral angles almost right-angled, posterior lateral angles rounded. No excavation anterolaterally. Lateral border not punctate. Dorsal surface shagreened to matte, with regular punctures separated by 1–2 puncture diameters (Figs. 78, 86).</p> <p> <b>Elytra.</b> Elytral interstriae 1–8 even, shagreened, irregularly punctate, punctures irregularly sized, separated by 0.5–2 puncture diameters, margins of punctures not carinate (Fig. 96). Striae punctate with punctures separated by 2–4 puncture diameters. Sutural interstria narrow with single row of punctures up to apex, all other elytral interstriae wider, with 2–3 very irregular rows of punctures. Stria 9 long, 3/4 the length of elytron; interstria 10 is 2–3 times narrower than interstria 9 in the middle of elytron.</p> <p> <b>Aedeagus.</b> Sclerite of the internal sac straight, with weakly developed lateral process. (Fig. 36)</p> <p> <b>Size range.</b> Females length: 7.0– 7.2 mm; width: 4.5–4.9 mm.</p> <p> <b>Female.</b> Female differs from male by having less developed frontal suture as well as the elytral striae 1–8 being less shagreened and shinier than in males.</p> <p> <b>Etymology.</b> Oreads are Greek mythological mountain nymphs.</p> <p> <b>Differential diagnosis.</b> Superficially similar to species from the <i>M. minutus</i> group but can be separated by the more oval body shape (Fig. 19) and by having a longer elytral stria 9.</p> <p> <b>Habitat and distribution.</b> This species was collected in an isolated, mesic ravine (Armmanshoek) in the Vanderster Mountains in the Richtersveld National Park, South Africa (Fig. 2). Mucina & Rutherford (2006) classify this area as the Stinkfonteinberge Quartzite Fynbos vegetation type. The soils are predominantly loamy. It receives approximately 200 mm rain per year. Coastal fogs occur between 10 and 20 days a year.</p> <p> <b>Remarks.</b> Three specimens were sequenced for five gene regions (A, cytochrome oxidase I; B, 16S ribosomal RNA; C, 28S rRNA domain 2; D, 28S rRNA domain 3; and E, the CPSase region of CAD (carbamoyl–phosphate synthetase 2, aspartate transcarbamylase, and dihydroorotase)). The sequences can be found in GenBank (submitted by Sole & Scholtz 2010) with the following accession numbers: specimen 1, A: GQ290039 B:</p> <p>GQ289687 C: GQ289821 D: GQ289905 E: GQ289974; specimen 2, A: GQ290040 B: GQ289688 C: GQ289822 D: GQ289906 E: no sequence; specimen 3, A: GQ290041 B: GQ289689 C: GQ289823 D: GQ289907 E: GQ289975. A label with GenBank accession numbers has been added to each of the three specimens. Specimens were dissected during DNA extraction and are kept in ethanol.</p>Published as part of <i>Abdalla, Ishtiag H., Deschodt, Christian M., Scholtz, Clarke H. & Sole, Catherine L., 2018, An update to the taxonomy of the genus Macroderes Westwood 1842 (Coleoptera: Scarabaeidae: Scarabaeinae) with descriptions of new species from South Africa, pp. 41-75 in Zootaxa 4504 (1)</i> on pages 66-67, DOI: 10.11646/zootaxa.4504.1.3, <a href="http://zenodo.org/record/2606164">http://zenodo.org/record/2606164</a>
Measurement of b-hadron masses
No full textMeasurements of b-hadron masses are performed with the exclusive decay modes B +→J/ψK +, B 0→J/ψK +, B0→J/ψKS0, Bs0→J/ψφ and Λb0→J/ψΛ using an integrated luminosity of 35pb -1 collected in pp collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with J/ψ→μ +μ - decays and verified to be known to a relative precision of 2 ×10 -4 using other two-body decays. The results are more precise than previous measurements, particularly in the case of the Bs0 and Λb0 masses
The Institute for Religious works: key features of financial intermediation
No full textCorresponding author: F. Arnaboldi, email: [email protected]. While the paper is the result of intense collaboration between the two authors, sections 3 is attributable to F. Arnaboldi and section 1 and 2 to B. Rossignoli. Section 4 is a joint effort. The authors wish to thank P. Mottura and two anonymous referees for their valuable comments. All errors are ours. Article peer reviewed.SUMMARY: 1. Introduction – 2. Background to anti-money laundering – 3. Financial intermediation, 2011–2014 – 4. Conclusion
Some formulas for the Appell function F 1 (a, b, b′; c; w, z)
No full textSome new relations for the Appell function F 1 (a, b, b′; c; w, z) are obtained including differentiation and integration formulas, integral representations, series and recurrence relations. Some integrals are given which can be expressed in terms of F 1 and confluent Appell functions (Humbert functions) Φ1, Φ2, Φ
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
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