1,761 research outputs found
Analysis of the scalar, axialvector, vector, tensor doubly charmed tetraquark states with QCD sum rules
In this article, we construct the axialvector-diquark-axialvector-antidiquark
type currents to interpolate the scalar, axialvector, vector, tensor doubly
charmed tetraquark states, and study them with QCD sum rules systematically by
carrying out the operator product expansion up to the vacuum condensates of
dimension 10 in a consistent way, the predicted masses can be confronted to the
experimental data in the future. We can search for those doubly charmed
tetraquark states in the Okubo-Zweig-Iizuka super-allowed strong decays to the
charmed meson pairs.Comment: 23 pages, 29 figures. arXiv admin note: substantial text overlap with
arXiv:1708.0454
Resummation prediction on gauge boson pair production with a jet veto
We investigate the resummation effects with a jet veto, for WZ and ZZ
productions at the LHC in soft-collinear effective theory. We present the
invariant mass distributions and the total cross section with different jet
veto and jet radius for these process at Next-to-Next-to-Leading-Logarithmic
level. Our results show that the jet-veto resummation can increase the jet-veto
cross section and decrease the scale uncertainties, especially in the large
center-of-mass energy. We find that for pt_veto>30 GeV and R=0.4, the
resummation results can increase POWHEG+PYTHIA predictions by about 19% for WZ
production and 18% for ZZ production, respectively. Our results agree with the
CMS data for WZ productions within 2 C.L. at 8 TeV, which can explain
the 2 discrepancy between the CMS experimental results and theoretical
predictions based on NLO calculation with parton showers.Comment: 15 pages, 11 figure
Egzaktna rješenja poopčene kdv jednadžbe s promjenljivim koeficijentima
The generalized variable-coefficient Korteveg de Vries equation is investigated by means of the polynomial expansion method and many travelling-wave solutions are constructed, including the solitary wave, the triangular periodic wave and the rational solutions. The technique is straightforward to use and only minimal algebra is needed to find these solutions. A simple review of the method is finally given.Istražili smo poopćenu KdV jednadžbu s promjenljivim koeficijentima metodom razvoja po polinomima. Izvode se mnoga rješenja za putujuće valove, uključivši solitone, trokutne periodičke valove i racionalna rješenja. Postupak je izravan i rješenja se dobivanju vrlo jednostavnim računom. Izlaže se jednostavan pregled postupka
Egzaktna rješenja poopčene kdv jednadžbe s promjenljivim koeficijentima
The generalized variable-coefficient Korteveg de Vries equation is investigated by means of the polynomial expansion method and many travelling-wave solutions are constructed, including the solitary wave, the triangular periodic wave and the rational solutions. The technique is straightforward to use and only minimal algebra is needed to find these solutions. A simple review of the method is finally given.Istražili smo poopćenu KdV jednadžbu s promjenljivim koeficijentima metodom razvoja po polinomima. Izvode se mnoga rješenja za putujuće valove, uključivši solitone, trokutne periodičke valove i racionalna rješenja. Postupak je izravan i rješenja se dobivanju vrlo jednostavnim računom. Izlaže se jednostavan pregled postupka
Revisit assignments of the new excited states with QCD sum rules
In this article, we distinguish the contributions of the positive parity and
negative parity states, study the masses and pole residues of the
1S, 1P, 2S and 2P states with the spin and
using the QCD sum rules in a consistent way, and revisit the
assignments of the new narrow excited states. The predictions
support assigning the to be the 1P state with
, assigning the to be the 1P
state with or the 2S state with
, and assigning to be the 2S
state with .Comment: 19 pages, 22 figures. arXiv admin note: text overlap with
arXiv:1705.0774
Resummation prediction on the jet mass spectrum in one-jet inclusive production at the LHC
We study the factorization and resummation prediction on the jet mass
spectrum in one-jet inclusive production at the LHC based on soft-collinear
effective theory. The soft function with anti- algorithm is calculated at
next-to-leading order and its validity is demonstrated by checking the
agreement between the expanded leading singular terms with the exact
fixed-order result. The large logarithms and the global
logarithms in the process are resummed to all order at
next-to-leading logarithmic and next-to-next-to-leading logarithmic level,
respectively. The cross section is enhanced by about 23% from the
next-to-leading logarithmic level to next-to-next-to-leading logarithmic level.
Comparing our resummation predictions with those from Monte Carlo tool PYTHIA
and ATLAS data at the 7 TeV LHC, we find that the peak positions of the jet
mass spectra agree with those from PYTHIA at parton level, and the predictions
of the jet mass spectra with non-perturbative effects are in coincidence with
the ATLAS data. We also show the predictions at the future 13 TeV LHC.Comment: 43 pages, 10 figure
Threshold Resummation for WZ and ZZ Pair Production at the LHC
We perform the threshold resummation for WZ and ZZ pair production at the
next-to-next-to-leading logarithmic accuracy in Soft-Collinear Effective Theory
at the LHC. Our results show that the resummation effects increase the total
cross sections by about 7% for ZZ production and 12% for WZ production
with$\sqrt{S}= 7,~8,~13 and 14 TeV, respectively, and the scale uncertainties
are significantly reduced. Besides, our numerical results are well consistent
with experimental data reported by the ATLAS and CMS collaborations.Comment: 14 pages, 8 figures, 2 tables, version published in Phys.Rev.
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