Study of the hc(11P1) meson via ψ(2S)→π0hc decays at BESIII

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Study of the hc(11P1) meson via ψ(2S)→π0hc decays at BESIII. / BESIII Collaboration ; Мучной, Николай Юрьевич ; Николаев, Иван Борисович.

In: Physical Review D, Vol. 106, No. 7, 072007, 2022.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{630d979a2fa34e4fa4a3e3a0809cf43d,

title = "Study of the hc(11P1) meson via ψ(2S)→π0hc decays at BESIII",

abstract = "Using 448 million ψ(2S) events, the spin-singlet P-wave charmonium state hc(1P11) is studied via the ψ(2S)→π0hc decay followed by the hc→γηc transition. The branching fractions are measured to be BInc(ψ(2S)→π0hc)×BTag(hc→γηc)=(4.22-0.26+0.27±0.19)×10-4, BInc(ψ(2S)→π0hc)=(7.32±0.34±0.41)×10-4, and BTag(hc→γηc)=(57.66-3.50+3.62±0.58)%, where the uncertainties are statistical and systematic, respectively. The hc(1P11) mass and width are determined to be M=(3525.32±0.06±0.15) MeV/c2 and Γ=(0.78-0.24+0.27±0.12) MeV. Using the center of gravity mass of the three χcJ(13PJ) mesons [M(c.o.g.)], the 1P hyperfine mass splitting is estimated to be Δhyp=M(hc)-M(c.o.g.)=(0.03±0.06±0.15) MeV/c2, which is consistent with the expectation that the 1P hyperfine splitting is zero at the lowest order.",

author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",

note = "Study of the hc(11P1) meson via ψ(2S)→π0hc decays at BESIII / BESIII Collaboration // Physical Review D. – 2022. – Vol. 106, No. 7. – P. 072007. – DOI 10.1103/physrevd.106.072007",

year = "2022",

doi = "10.1103/PhysRevD.106.072007",

language = "English",

volume = "106",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "7",

}

RIS

TY - JOUR

T1 - Study of the hc(11P1) meson via ψ(2S)→π0hc decays at BESIII

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - Study of the hc(11P1) meson via ψ(2S)→π0hc decays at BESIII / BESIII Collaboration // Physical Review D. – 2022. – Vol. 106, No. 7. – P. 072007. – DOI 10.1103/physrevd.106.072007

PY - 2022

Y1 - 2022

N2 - Using 448 million ψ(2S) events, the spin-singlet P-wave charmonium state hc(1P11) is studied via the ψ(2S)→π0hc decay followed by the hc→γηc transition. The branching fractions are measured to be BInc(ψ(2S)→π0hc)×BTag(hc→γηc)=(4.22-0.26+0.27±0.19)×10-4, BInc(ψ(2S)→π0hc)=(7.32±0.34±0.41)×10-4, and BTag(hc→γηc)=(57.66-3.50+3.62±0.58)%, where the uncertainties are statistical and systematic, respectively. The hc(1P11) mass and width are determined to be M=(3525.32±0.06±0.15) MeV/c2 and Γ=(0.78-0.24+0.27±0.12) MeV. Using the center of gravity mass of the three χcJ(13PJ) mesons [M(c.o.g.)], the 1P hyperfine mass splitting is estimated to be Δhyp=M(hc)-M(c.o.g.)=(0.03±0.06±0.15) MeV/c2, which is consistent with the expectation that the 1P hyperfine splitting is zero at the lowest order.

AB - Using 448 million ψ(2S) events, the spin-singlet P-wave charmonium state hc(1P11) is studied via the ψ(2S)→π0hc decay followed by the hc→γηc transition. The branching fractions are measured to be BInc(ψ(2S)→π0hc)×BTag(hc→γηc)=(4.22-0.26+0.27±0.19)×10-4, BInc(ψ(2S)→π0hc)=(7.32±0.34±0.41)×10-4, and BTag(hc→γηc)=(57.66-3.50+3.62±0.58)%, where the uncertainties are statistical and systematic, respectively. The hc(1P11) mass and width are determined to be M=(3525.32±0.06±0.15) MeV/c2 and Γ=(0.78-0.24+0.27±0.12) MeV. Using the center of gravity mass of the three χcJ(13PJ) mesons [M(c.o.g.)], the 1P hyperfine mass splitting is estimated to be Δhyp=M(hc)-M(c.o.g.)=(0.03±0.06±0.15) MeV/c2, which is consistent with the expectation that the 1P hyperfine splitting is zero at the lowest order.

UR - https://www.elibrary.ru/item.asp?id=58646061

UR - https://www.mendeley.com/catalogue/f37f8179-3d48-3292-a40b-00ecde4a300e/

U2 - 10.1103/PhysRevD.106.072007

DO - 10.1103/PhysRevD.106.072007

M3 - Article

VL - 106

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 7

M1 - 072007

ER -

ID: 68348447