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Träfflista för sökning "WFRF:(Ya L.) srt2:(2015-2019)"

Search: WFRF:(Ya L.) > (2015-2019)

  • Result 1-10 of 69
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1.
  • Ablikim, M., et al. (author)
  • Amplitude analysis of the chi(c1) -> eta pi(+)pi(-) decays
  • 2017
  • In: Physical Review D. - : AMER PHYSICAL SOC. - 2470-0010 .- 2470-0029. ; 95:3
  • Journal article (peer-reviewed)abstract
    • Using 448.0 x 10(6) psi(3686) events collected with the BESIII detector, an amplitude analysis is performed for psi(3686) -> gamma chi(c1), chi(c1) ->eta pi(+)pi(-) decays. The most dominant two- body structure observed is a(0)(980)(+/-) pi(-/+); a(0)(980)(+/-) -> eta pi(+/-.) line shape is modeled using a dispersion relation, and a significant nonzero a(0) (980) coupling to the eta'pi channel is measured. We observe chi(c1) -> a(2)(1700)pi production for the first time, with a significance larger than 17 sigma. The production of mesons with exotic quantum numbers, J(PC) = 1(-+), is investigated, and upper limits for the branching fractions chi(c1) -> pi(1)(1400)(+/-)pi(-/+) , chi(c1) -> pi(1)(1600)(+/-)pi(-/+) and chi(c1) -> pi 1(2015)(+/-)pi(-/+) with subsequent pi(1)(X)(+/-) -> eta pi(+/-) decay, are determined.
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2.
  • Ablikim, M., et al. (author)
  • Observation of e(+)e(-) -> phi chi(c1) and phi chi(c2) at root s=4.600 GeV
  • 2018
  • In: Physical Review D. - : AMER PHYSICAL SOC. - 2470-0010 .- 2470-0029. ; 97:3
  • Journal article (peer-reviewed)abstract
    • Using a data sample collected with the BESIII detector operating at the BEPCII storage ring at a center-of-mass energy of root s = 4.600 GeV, we search for the production of e(+)e(-) -> phi chi(c0,1,2). A search is also performed for the charmonium-like state X(4140) in the radiative transition e(+)e(-) -> gamma X(4140) with X(4140) subsequently decaying into phi J/psi The processes e(+)e(-) -> phi chi(c1) and phi chi(c2) are observed for the first time, each with a statistical significance of more than 10 sigma, and the Born cross sections are measured to be (4.2(-1.0)(+1.7) +/- 0.3) and (6.7(-1.7)(+3.4) +/- 0.5) pb, respectively, where the first uncertainties are statistical and the second systematic. No significant signals are observed for e(+)e(-) -> phi chi(c0) and e(+)e(-) -> gamma X(4140) and upper limits on the Born cross sections at 90% C. L. are provided at root s = 4.600 GeV.
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3.
  • Ablikim, M., et al. (author)
  • Measurement of branching fractions for psi(3686) -> gamma eta ', gamma eta, and gamma pi(0)
  • 2017
  • In: Physical Review D. - : AMER PHYSICAL SOC. - 2470-0010 .- 2470-0029. ; 96:5
  • Journal article (peer-reviewed)abstract
    • Using a data sample of 448 x 10(6) psi(3686) events collected with the BESIII detector operating at the BEPCII storage ring, the decays psi(3686) -> gamma eta and psi(3686) -> gamma pi(0) are observed with a statistical significance of 7.3 sigma and 6.7 sigma, respectively. The branching fractions are measured to be B(psi(3686) -> gamma eta) = (0.85 +/- 0.18 +/- 0.05) x 10(-6) and B(psi(3686) ->gamma pi(0)) = (0.95 +/- 0.16 +/- 0.05) x 10(-6). In addition, we measure the branching fraction of psi(3686) -> gamma eta' to be B(psi(3686) -> gamma eta') = (125.1 +/- 2.2 +/- 6.2)x10(-6), which represents an improvement of precision over previous results.
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  • Result 1-10 of 69
Type of publication
journal article (64)
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other academic/artistic (4)
Author/Editor
Bennett, DA (13)
Brenner, H (13)
Catala-Lopez, F (13)
Hamadeh, RR (13)
Jonas, JB (13)
Khang, YH (13)
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Malekzadeh, R (13)
Gupta, R. (12)
Bensenor, IM (12)
Dandona, L (12)
Dandona, R (12)
Khader, YS (12)
Kumar, GA (12)
Lunevicius, R (12)
Meretoja, A (12)
Miller, TR (12)
Mokdad, AH (12)
Nangia, V (12)
Kim, D. (11)
Antonio, CAT (11)
Bhutta, ZA (11)
Cardenas, R (11)
Chang, JC (11)
Dharmaratne, SD (11)
Farzadfar, F (11)
Fischer, F (11)
Hamidi, S (11)
Hankey, GJ (11)
Hosgood, HD (11)
Jeemon, P (11)
Karch, A (11)
Khan, EA (11)
Defo, BK (11)
Lalloo, R (11)
Leigh, J (11)
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Majeed, A (11)
Mendoza, W (11)
Meretoja, TJ (11)
Monasta, L (11)
Moradi-Lakeh, M (11)
Naghavi, M (11)
Ogbo, FA (11)
Oh, IH (11)
Park, EK (11)
Pereira, DM (11)
Pesudovs, K (11)
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Swedish University of Agricultural Sciences (1)
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Language
English (69)
Research subject (UKÄ/SCB)
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Natural sciences (16)
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