Search Results - "Narison, S."

Scalar meson contributions to aμ from hadronic light-by-light scattering by Knecht, M., Narison, S., Rabemananjara, A., Rabetiarivony, D.

“…Using an effective σ/f0(500) resonance, which describes the ππ→ππ and γγ→ππ scattering data, we evaluate its contribution and the ones of the other scalar…”
Get full text

Scalar meson contributions to a from hadronic light-by-light scattering by Knecht, M., Narison, S., Rabemananjara, A., Rabetiarivony, D.

Get full text

Scrutinizing the light scalar quarkonia from LSR at higher orders by Albuquerque, R., Narison, S., Rabetiarivony, D.

“…We scrutinize, improve some determinations of the masses and couplings of light scalar quarkonia (q¯q and four-quark states) and present new results for the…”
Get full text

Light scalar quarkonia from Laplace sum rule at NLO by Albuquerque, R.M., Narison, S., Rabetiarivony, D.

“…We review our results on light scalar quarkonia (q¯q and four-quark states) from (inverse) QCD Laplace sum rules (LSR) and their ratios R within stability…”
Get full text

Masses, decays and mixings of gluonia in QCD by Narison, S.

“…We compute the masses and decay widths of the gluonia using QCD spectral sum rules and low-energy theorems. In the scalar sector, one finds a gluonium having a…”
Get full text

(Q¯q¯Qq) from QCD Laplace sum rule by Albuquerque, R.M., Narison, S., Rabemananjara, A., Rabetiarivony, D.

“…We present a review of our recent works on heavy-light exotic states, with new compact integrated expressions of the spectral functions at lowest order (LO) of…”
Get full text

(Q¯Q¯)(QQ) and TQQ within QCD Laplace sum rules by Albuquerque, R.M., Narison, S., Rabemananjara, A., Rabetiarivony, D.

“…We present a review of our results for the masses and couplings of the scalar fully heavy four-quarks and TQQq¯q¯′(JP=0±,1±) tetraquarks states from (inverse)…”
Get full text

Mass-splittings of doubly heavy baryons in QCD by Albuquerque, R.M., Narison, S.

“…We consider (for the first time) the ratios of doubly heavy baryon masses (spin 3/2 over spin 1/2 and SU(3) mass-splittings) using double ratios of sum rules…”
Get full text

SU(3) mass-splittings of heavy-baryons in QCD by Albuquerque, R.M., Narison, S., Nielsen, M.

“…We extract directly (for the first time) the charmed (C=1) and bottom (B=−1) heavy-baryons (spin 1/2 and 3/2) mass-splittings due to SU(3) breaking using…”
Get full text

Relation between Tcc,bb and Xc,b from QCD by Dias, J.M., Narison, S., Navarra, F.S., Nielsen, M., Richard, J.-M.

“…We have studied, using double ratio of QCD (spectral) sum rules, the ratio between the masses of Tcc and X(3872) assuming that they are respectively described…”
Get full text

σ and f0(980) substructures from γγ→ππ, J/ψ,ϕ radiative and Ds semi-leptonic decays by Mennessier, G., Narison, S., Wang, X.-G.

“…Using an improved “analytic K-matrix model”, we reconsider the extraction of the σ≡f0(600) and f0(980)γγ widths from γγ→ππ scatterings data of Crystal Ball and…”
Get full text

Hints on the power corrections from current correlators in x-space by Narison, S, Zakharov, V.I

“…We consider an interpretation of the recent lattice data on the current–current correlators in the x-space. The data indicate rather striking difference…”
Get full text

1−− and 0++ heavy four-quark and molecule states in QCD by Albuquerque, R.M., Fanomezana, F., Narison, S., Rabemananjara, A.

“…We estimate the masses of the 1−− heavy four-quark and molecule states by combining exponential Laplace (LSR) and finite energy (FESR) sum rules known…”
Get full text

Direct extraction of the chiral quark condensate and bounds on the light quark masses by Dosch, H.G., Narison, S.

“…We select sum rules from which one can extract directly reliable limits on the size of the chiral symmetry breaking light quark condensate 〈 ψ ̄ ψ〉 . Combined…”
Get full text

Gluonium nature of the σ/f0(600) from its coupling to KK by Kamiński, R., Mennessier, G., Narison, S.

“…We extract the K+K− couplings of the isoscalar scalar mesons σ/f0(600) and f0(980) from ππ→ππ/KK¯ scatterings. We find respectively about 0.6(2) and 2.0(3) for…”
Get full text

Zc,b-like states from QCD Laplace sum rules at NLO by Narison, S., Rabetiarivony, D.

“…We review our results on Zc-like states [1] which we complete with the ones on Zb-like states by using relativistic QCD Laplace Sum Rules (LSR) within…”
Get full text

Improved XTZ masses and mass ratios from Laplace sum rules at NLO by Albuquerque, R., Narison, S., Rabetiarivony, D.

“…We present improved estimates of the couplings, masses and mass ratios of the ZQ,XQ and TQQq¯q¯′ states (Q≡c,b;q,q′≡u,d,s) using (inverse) QCD Laplace sum…”
Get full text

Z,-like states from QCD Laplace sum rules at NLO by Narison, S., Rabetiarivony, D.

Get full text

Pseudoscalar and vector TQQq¯q¯′ spectra and couplings from LSR at NLO by Albuquerque, R., Narison, S., Rabetiarivony, D.

“…We present systematic and improved estimates of the masses and couplings of the Pseudoscalar (0−) and Vector (1−)TQQq¯q¯′ states (Q≡c,b;q,q′≡u,d,s) using…”
Get full text

Pseudoscalar and vector T Q Q q ¯ q ¯ ′ spectra and couplings from LSR at NLO by Albuquerque, R., Narison, S., Rabetiarivony, D.

Get full text