1,721,892 research outputs found
Magnetic dipole moment of Z(b)(10610) in light-cone QCD
Get PDFAzizi, Kazem (Dogus Author) -- Özdem, Ulaş (Dogus Author)The magnetic dipole moment of the exotic Z(b)(10610) state is calculated within the light cone QCD sum rule method using the diquark-antidiquark and molecule interpolating currents. The magnetic dipole moment is obtained as mu(Zb) = 1.73 +/- 0.63 mu(N) in diquark-antidiquark picture and mu(Zb) = 1.59 +/- 0.58 mu(N) in the molecular case. The obtained results in both pictures together with the results of other theoretical studies on the spectroscopic parameters of the Zb(10610) state may be useful in determination of the nature and quark organization of this state
in a hadronic medium
No full textInternational audienceIn this work we investigate the (called simply ) abundance in the hot hadron gas produced in heavy ion collisions after the quark–gluon plasma phase. We use effective Lagrangians to calculate the thermally averaged cross sections of production in processes such as and also of its absorption in the corresponding inverse processes. We then solve the rate equation to follow the time evolution of the multiplicity. We find that, if we neglect the decay, the number of ’s produced at the end of the quark–gluon plasma phase remains almost constant during the hadron phase. The introduction of the decay in the rate equation leads to a suppression in the final yield by a factor two
Spectroscopic parameters and decays of the resonance Z(b)(10610)
Get PDFAzizi, Kazem (Dogus Author)The resonance Zb(10610) is investigated as the diquark-antidiquark Zb = [bu][(b) over bar(d) over bar] state with spin-parity J(P) = 1(+). The mass and current coupling of the resonance Z(b)(10610) are evaluated using QCD two-point sum rule and taking into account the vacuum condensates up to ten dimensions. We study the vertices Z(b)r(nS)pi (n = 1, 2, 3) by applying the QCD light-cone sum rule to compute the corresponding strong couplings gZb.(nS) p and widths of the decays Z(b)-> r(nS)pi. We explore also the vertices Z(b)h(b)(mP)pi (m = 1, 2) and calculate the couplings gZ(b)h(b)(mP) p and the widths of the decay channels Z(b) -> hb(mP)pi To this end, we calculate the mass and decay constants of the h(b)(1P) and h(b)(2P) mesons. The results obtained are compared with experimental data of the Belle Collaboration
Investigations on the light hadron decays of and
Get PDFThe light hadron decay processes of provide us a way
to study their nature and decay mechanism. In this work, we evaluate the
branching ratios of ( and stand for light
vector and pseudoscalar mesons, respectively) using an effective Lagrangian
approach, in which the contributions of intermediate bottomed meson triangle
loops are considered. In our calculations, the and
are regarded as and molecular states,
respectively. The predicted branching ratios of are
about in the order of , while the branching ratios of
are in the order of . Furthermore, the
dependence of these ratios between different decay modes of
on the mixing angle is
investigated, which may be a good quantity for the experiments. It is hoped
that the calculations here could be tested by future experiments.Comment: 7 pages, 8 figures and 1 tabl
Possible assignments of the X ( 3872 ) , Z c ( 3900 ) , and Z b ( 10610 ) as axial-vector molecular states
Get PDFIn this article, we construct both the color singlet–singlet type and the octet–octet type currents to interpolate , , and , and we calculate the vacuum condensates up to dimension-10 in the operator product expansion. Then we study the axial-vector hidden charm and hidden bottom molecular states with the QCD sum rules, explore the energy-scale dependence of the QCD sum rules for the heavy molecular states in details, and we use the formula with the effective masses to determine the energy scales. The numerical results support assigning , , and as the color singlet–singlet type molecular states with , , , respectively, more theoretical and experimental work is still needed to distinguish the molecule and tetraquark assignments; while there are no candidates for the color octet–octet type molecular states
CT scan data of wild turkey, Meleagris gallopavo OUVC 10610
No full textThis zip file contains DICOM images from an x-ray microcomputed tomography (µCT) scan of an injected Meleagris gallopavo (OUVC 10610). The arteries and veins were injected with a latex and barium solution and scanned on a GE eXplore Locus in vivo Small Animal MicroCT scanner (90µm slice thickness at 80kV and 450 µA) at the Ohio University µCT Scanning Facility
First Observation of the Zb0(10610) in a Dalitz Analysis of Y(5S) - Y(nS) pi0 pi0
No full textWe report the first observation of Y(5S) - Y(nS) pi0 pi0 decays. The neutral partner of the Zb+-(10610), the Zb0(10610) decaying to Y(2,3S) pi0, is observed for the first time with a 6.5 sigma significance using a Dalitz analysis of Y(5S) - Y(2,3S) pi0 pi0 decays. The results are obtained with a 121.4 fb-1 data sample collected with the Belle detector at the Y(5S) resonance at the KEKB asymmetric-energy e+e- collider
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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