Yazar "Achasov M.N." seçeneğine göre listele

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    Measurement of the branching fraction for ? (3686) ?? KS0 KS0
    (American Physical Society, 2021) Ablikim M.; Achasov M.N.; Adlarson P.; Ahmed S.; Albrecht M.; Aliberti R.; Çetin, Serkant Ali; Kolcu, Onur Buğra
    Analyzing (448.1±2.9)×106 ?(3686) events collected with the BESIII detector at the BEPCII collider, the ?(3686)??KS0KS0 decay is observed for the first time. The branching fraction for this decay is determined to be B?(3686)??KS0KS0=(7.04±0.39±0.36)×10-5, where the first uncertainty is statistical and the second is systematic.
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    Measurement of the branching fraction of the singly cabibbo-suppressed decay ?c+ ? ?k+
    (APS, 2022) Ablikim M.; Achasov M.N.; Baldini Ferroli R.; Balossino I.; Bertani M.; Kolcu, Onur Buğra; Çetin, Serkant Ali
    We report a branching fraction measurement of the singly Cabibbo-suppressed decay ?c+??K+ using a data sample collected with the BESIII detector at the BEPCII storage ring. The data span center-of-mass energies from 4.599 to 4.950 GeV and correspond to an integrated luminosity of 6.44 fb-1. The branching fraction of ?c+??K+ relative to that of the Cabibbo-favored decay ?c+???+ is measured to be R=B(?c+??K+)B(?c+???+)=(4.78±0.34±0.20)%. Combining with the world-average value of B(?c+???+), we obtain B(?c+??K+)=(6.21±0.44±0.26±0.34)×10-4. Here the first uncertainties are statistical, the second systematic, and the third comes from the uncertainty of the ?c+???+ branching fraction. This result, which is more precise than previous measurements, does not agree with theoretical predictions, and suggests that nonfactorizable contributions have been underestimated in current models. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
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    Observation of the decay ?(3686) ? ? ?? ¯ + and measurement of its angular distribution
    (Springer link, 2022) Ablikim M.; Achasov M.N.; Adlarson P.; Albrecht M.; Aliberti R.; Amoroso A.; An M.R.; An Q.; Bai X.H.; Bai Y.; Bakina O.; Baldini Ferroli R.; Çetin, Serkant Ali; Kolcu, Onur Buğra
    Using (448.1 ± 2.9) × 106?(3686) events collected with the BESIII detector at the BEPCII collider, the decay ?(3686) ?? ?? ¯ + is observed for the first time with a branching fraction of (2.82 ± 0.04stat.± 0.08syst.) × 10?4, and the angular parameter ??? is measured to be 0.96 ± 0.09stat.± 0.03syst.. [Figure not available: see fulltext.] © 2022, The Author(s).
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    Observation of the hindered electromagnetic dalitz decay ? (3686) ?e+e-?c
    (APS, 2022) Ablikim M.; Achasov M.N.; Adlarson P.; Albrecht M.; Bai X.H.; Amoroso A.
    Using a data sample of (448.1±2.9)×106 ?(3686) decays collected at an e+e- center-of-mass energy of 3.686 GeV by the BESIII detector at Beijing Electron Positron Collider II, we report an observation of the hindered electromagnetic Dalitz decay ?(3686)?e+e-?c with a significance of 7.9?. The branching fraction is determined to be B(?(3686)?e+e-?c)=(3.77±0.40stat±0.18syst)×10-5, agreeing well with the prediction of the vector meson dominance model. This is the first measurement of the electromagnetic Dalitz transition between the ?(3686) and the ?c, which provides new insight into the electromagnetic properties of this decay, and offers new opportunities to measure the absolute branching fractions of ?c decays. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
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    Search for the weak decay ?(3686) ? ?+c ?¯? + c.c.
    (2023) Achasov M.N.; Adlarson P.; Albrecht M.; Amoroso A.; An M.R.; Çetin, Serkant Ali; Kolcu, Onur Buğra
    Using (448.1±2.9)×106 ?(3686) events collected with the BESIII detector, we perform the first search for the weak baryonic decay ?(3686) ? ?+c ?¯? + c.c.. The analysis procedure is optimized using a blinded method. No significant signal is observed, and the upper limit on the branching fraction (B) of ?(3686) ? ?+c ?¯? + c.c. is set as 1.4 × 10?5 at the 90% confidence level. © 2023 Institute of Physics Publishing. All rights reserved.
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    Study of the semileptonic decay ?c+ ? ?e+?e
    (American Physical Society, 2022) Ablikim M.; Achasov M.N.; Adlarson P.; Albrecht M.; Amoroso A.; Çetin, Serkant Ali; Kolcu, Onur Buğra
    The study of the Cabibbo-favored semileptonic decay ?c+??e+?e is reported using a 4.5 fb-1 data sample of e+e- annihilations collected at center-of-mass energies ranging from 4.600 GeV to 4.699 GeV with the BESIII detector at the BEPCII collider. The branching fraction of the decay is measured to be B(?c+??e+?e)=(3.56±0.11stat±0.07syst)%, which is the most precise measurement to date. Furthermore, we perform an investigation of the internal dynamics in ?c+??e+?e. We provide the first direct comparisons of the differential decay rate and form factors with those predicted from lattice quantum chromodynamics (LQCD) calculations. Combining the measured branching fraction with a q2-integrated rate predicted by LQCD, we determine |Vcs|=0.936±0.017B±0.024LQCD±0.007??c. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.