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1

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Multi-messenger Observations of a Binary Neutron Star Merger

Abbott, B. P. ; Abbott, R. ; Abbott, T. D. ; [weitere]

American Astronomical Society ; 2017

In: The Astrophysical Journal Vol. 848, No. 2 ( 2017-10-16), p. L12-

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In: The Astrophysical Journal, American Astronomical Society, Vol. 848, No. 2 ( 2017-10-16), p. L12-

Materialart: Online-Ressource

ISSN: 2041-8213

URL: Article

DOI: 10.3847/2041-8213/aa91c9

Sprache: Unbekannt

Verlag: American Astronomical Society

Publikationsdatum: 2017

ZDB Id: 2207648-7

ZDB Id: 2006858-X

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2

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Search for the weak decay *

Ablikim, M. ; Achasov, M. N. ; Adlarson, P. ; [weitere]

IOP Publishing ; 2023

In: Chinese Physics C Vol. 47, No. 1 ( 2023-01-01), p. 013002-

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In: Chinese Physics C, IOP Publishing, Vol. 47, No. 1 ( 2023-01-01), p. 013002-

Kurzfassung: Using events collected with the BESIII detector, we perform the first search for the weak baryonic decay . The analysis procedure is optimized using a blinded method. No significant signal is observed, and the upper limit on the branching fraction ( ) of is set as at the 90% confidence level.

Materialart: Online-Ressource

ISSN: 1674-1137 , 2058-6132

URL: Article

DOI: 10.1088/1674-1137/ac9895

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2023

ZDB Id: 2491278-5

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3

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Observation of *

Ablikim, M. ; Achasov, M. N. ; Adlarson, P. ; [weitere]

IOP Publishing ; 2023

In: Chinese Physics C Vol. 47, No. 4 ( 2023-04-01), p. 043001-

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In: Chinese Physics C, IOP Publishing, Vol. 47, No. 4 ( 2023-04-01), p. 043001-

Kurzfassung: Using data taken at 29 center-of-mass energies between 4.16 and 4.70 GeV with the BESIII detector at the Beijing Electron Positron Collider corresponding to a total integrated luminosity of approximately 18.8 , the process is observed for the first time with a statistical significance of . The average Born cross sections in the energy ranges of (4.160, 4.380) GeV, (4.400, 4.600) GeV and (4.610, 4.700) GeV are measured to be fb, fb and fb, respectively, where the first uncertainties are statistical and the second are systematic. The line shapes of the and invariant mass spectra are consistent with phase space distributions, indicating that no hexaquark or di-baryon state is observed.

Materialart: Online-Ressource

ISSN: 1674-1137 , 2058-6132

URL: Article

DOI: 10.1088/1674-1137/acb6eb

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2023

ZDB Id: 2491278-5

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4

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Observation of the Y(4230) and a new structure in *

Ablikim, M. ; Achasov, M. N. ; Adlarson, P. ; [weitere]

IOP Publishing ; 2022

In: Chinese Physics C Vol. 46, No. 11 ( 2022-11-01), p. 111002-

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In: Chinese Physics C, IOP Publishing, Vol. 46, No. 11 ( 2022-11-01), p. 111002-

Kurzfassung: The cross sections of at center-of-mass energies from 4.127 to 4.600 GeV are measured based on 15.6 fb data collected with the BESIII detector operating at the BEPCII storage ring. Two resonant structures are observed in the line shape of the cross sections. The mass and width of the first structure are measured to be ( ) MeV and ( ) MeV, respectively. They are consistent with those of the established . The second structure is observed for the first time with a statistical significance greater than 8 σ , denoted as . Its mass and width are determined to be ( ) MeV and ( ) MeV, respectively. The first presented uncertainties are statistical and the second ones are systematic. The product of the electronic partial width with the decay branching fraction is reported.

Materialart: Online-Ressource

ISSN: 1674-1137 , 2058-6132

URL: Article

DOI: 10.1088/1674-1137/ac945c

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2022

ZDB Id: 2491278-5

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5

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Search for hidden-charm tetraquark with strangeness in *

Ablikim, M. ; Achasov, M. N. ; Adlarson, P. ; [weitere]

IOP Publishing ; 2023

In: Chinese Physics C Vol. 47, No. 3 ( 2023-03-01), p. 033001-

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In: Chinese Physics C, IOP Publishing, Vol. 47, No. 3 ( 2023-03-01), p. 033001-

Kurzfassung: We report a search for a heavier partner of the recently observed state, denoted as , in the process , based on collision data collected at the center-of-mass energies of , 4.682 and 4.699 GeV with the BESIII detector. The is of interest as it is expected to be a candidate for a hidden-charm and open-strange tetraquark. A partial-reconstruction technique is used to isolate recoil-mass spectra, which are probed for a potential contribution from ( ). We find an excess of ( ) candidates with a significance of , after considering systematic uncertainties, at a mass of . As the data set is limited in size, the upper limits are evaluated at the 90% confidence level on the product of the Born cross sections ( ) and the branching fraction ( ) of , under different assumptions of the mass from 4.120 to 4.140 MeV and of the width from 10 to 50 MeV at the three center-of-mass energies. The upper limits of are found to be at the level of pb at each energy. Larger data samples are needed to confirm the state and clarify its nature in the coming years.

Materialart: Online-Ressource

ISSN: 1674-1137 , 2058-6132

URL: Article

DOI: 10.1088/1674-1137/acac69

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2023

ZDB Id: 2491278-5

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6

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Luminosities and energies of e + e − collision data taken between =4.61 GeV and 4.95 GeV at BESIII*

Ablikim, M. ; Achasov, M. N. ; Adlarson, P. ; [weitere]

IOP Publishing ; 2022

In: Chinese Physics C Vol. 46, No. 11 ( 2022-11-01), p. 113003-

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In: Chinese Physics C, IOP Publishing, Vol. 46, No. 11 ( 2022-11-01), p. 113003-

Kurzfassung: From December 2019 to June 2021, the BESIII experiment collected approximately 5.85 fb −1 of data at center-of-mass energies between 4.61 and 4.95 GeV. This is the highest collision energy BEPCII has reached to date. The accumulated annihilation data samples are useful for studying charmonium(-like) states and charmed-hadron decays. By adopting a novel method of analyzing the production of pairs in annihilation, the center-of-mass energies are measured with a precision of 0.6 MeV. Integrated luminosities are measured with a precision of better than 1% by analyzing the events of large-angle Bhabha scattering. These measurements provide important inputs to analyses based on these data samples.

Materialart: Online-Ressource

ISSN: 1674-1137 , 2058-6132

URL: Article

DOI: 10.1088/1674-1137/ac84cc

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2022

ZDB Id: 2491278-5

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7

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Observations of the Cabibbo-Suppressed decays , and the Cabibbo-Favored decay *

Ablikim, M. ; Achasov, M. N. ; Adlarson, P. ; [weitere]

IOP Publishing ; 2023

In: Chinese Physics C Vol. 47, No. 2 ( 2023-02-01), p. 023001-

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In: Chinese Physics C, IOP Publishing, Vol. 47, No. 2 ( 2023-02-01), p. 023001-

Kurzfassung: Using electron-positron annihilation data samples corresponding to an integrated luminosity of 4.5 fb , collected by the BESIII detector in the energy region between and , we report the first observations of the Cabibbo-suppressed decays , , and the Cabibbo-favored decay with statistical significances of , , and , respectively. The branching fractions of these decays are measured to be %, %, and %, where the first uncertainties are statistical and the second are systematic. We find that the branching fraction of the decay is about one order of magnitude higher than that of .

Materialart: Online-Ressource

ISSN: 1674-1137 , 2058-6132

URL: Article

DOI: 10.1088/1674-1137/ac9d29

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2023

ZDB Id: 2491278-5

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8

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Measurement of integrated luminosities at BESIII for data samples at center-of-mass energies between 4.0 and 4.6 GeV*

Ablikim, M. ; Achasov, M. N. ; Adlarson, P. ; [weitere]

IOP Publishing ; 2022

In: Chinese Physics C Vol. 46, No. 11 ( 2022-11-01), p. 113002-

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In: Chinese Physics C, IOP Publishing, Vol. 46, No. 11 ( 2022-11-01), p. 113002-

Kurzfassung: The integrated luminosities of data samples collected in the BESIII experiment in 2016–2017 at center-of-mass energies between 4.19 and 4.28 GeV are measured with a precision better than 1% by analyzing large-angle Bhabha scattering events. The integrated luminosities of old datasets collected in 2010–2014 are updated by considering corrections related to detector performance, offsetting the effect of newly discovered readout errors in the electromagnetic calorimeter, which can haphazardly occur.

Materialart: Online-Ressource

ISSN: 1674-1137 , 2058-6132

URL: Article

DOI: 10.1088/1674-1137/ac80b4

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2022

ZDB Id: 2491278-5

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9

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Determination of the number of J/ψ events with J/ψ → inclusive decays

Ablikim, M. ; Achasov, M. N. ; Ambrose, D. J. ; [weitere]

IOP Publishing ; 2012

In: Chinese Physics C Vol. 36, No. 10 ( 2012-10), p. 915-925

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In: Chinese Physics C, IOP Publishing, Vol. 36, No. 10 ( 2012-10), p. 915-925

Materialart: Online-Ressource

ISSN: 1674-1137

URL: Article

DOI: 10.1088/1674-1137/36/10/001

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2012

ZDB Id: 2491278-5

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10

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Number of J/ψ events at BESIII *

Ablikim, M. ; Achasov, M. N. ; Adlarson, P. ; [weitere]

IOP Publishing ; 2022

In: Chinese Physics C Vol. 46, No. 7 ( 2022-07-01), p. 074001-

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In: Chinese Physics C, IOP Publishing, Vol. 46, No. 7 ( 2022-07-01), p. 074001-

Kurzfassung: Using inclusive decays of , a precise determination of the number of events collected with the BESIII detector was performed. For the two data sets taken in 2009 and 2012, the numbers of events were recalculated to be and , respectively; these numbers are in good agreement with the previous measurements. For the sample taken in 2017–2019, the number of events was determined to be . The total number of events collected with the BESIII detector was determined to be , where the uncertainty is dominated by systematic effects, and the statistical uncertainty is negligible.

Materialart: Online-Ressource

ISSN: 1674-1137 , 2058-6132

URL: Article

DOI: 10.1088/1674-1137/ac5c2e

Sprache: Unbekannt

Verlag: IOP Publishing

Publikationsdatum: 2022

ZDB Id: 2491278-5

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