Observation of ψ (3686) →n n ̄ and improved measurement of ψ (3686) →p p ̄

Standard

Observation of ψ (3686) →n n ̄ and improved measurement of ψ (3686) →p p ̄. / BESIII Collaboration.

In: Physical Review D, Vol. 98, No. 3, 032006, 10.08.2018.

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

Harvard

BESIII Collaboration 2018, 'Observation of ψ (3686) →n n ̄ and improved measurement of ψ (3686) →p p ̄', Physical Review D, vol. 98, no. 3, 032006. https://doi.org/10.1103/PhysRevD.98.032006

APA

BESIII Collaboration (2018). Observation of ψ (3686) →n n ̄ and improved measurement of ψ (3686) →p p ̄. Physical Review D, 98(3), [032006]. https://doi.org/10.1103/PhysRevD.98.032006

Vancouver

BESIII Collaboration. Observation of ψ (3686) →n n ̄ and improved measurement of ψ (3686) →p p ̄. Physical Review D. 2018 Aug 10;98(3):032006. doi: 10.1103/PhysRevD.98.032006

Author

BESIII Collaboration. / Observation of ψ (3686) →n n ̄ and improved measurement of ψ (3686) →p p ̄. In: Physical Review D. 2018 ; Vol. 98, No. 3.

BibTeX

@article{e08d81d7e6054bd3a947c19f91574fb7,

title = "Observation of ψ (3686) →n n{\= } and improved measurement of ψ (3686) →p p{\= }",

abstract = "We observe the decay ψ(3686)→n{\=n} for the first time and measure ψ(3686)→p{\=p} with improved accuracy by using 1.07×108 ψ(3686) events collected with the BESIII detector. The measured branching fractions are B(ψ(3686)→n{\=n})=(3.06±0.06±0.14)×10-4 and B(ψ(3686)→p{\=p})=(3.05±0.02±0.12)×10-4. Here, the first uncertainties are statistical, and the second ones are systematic. With the hypothesis that the polar angular distributions of the neutron and proton in the center-of-mass system obey 1+αcos2θ, we determine the α parameters to be αn{\=n}=0.68±0.12±0.11 and αp{\=p}=1.03±0.06±0.03 for ψ(3686)→n{\=n} and ψ(3686)→p{\=p}, respectively.",

keywords = "BARYON-ANTIBARYON PAIRS, J/PSI DECAYS, AMPLITUDES, BESIII, ANNIHILATION, TESTS, PHASE",

author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and S. Ahmed and M. Albrecht and Ambrose, {D. J.} and A. Amoroso and An, {F. F.} and Q. An and Bai, {J. Z.} and O. Bakina and {Baldini Ferroli}, R. and Y. Ban and Bennett, {D. W.} and Bennett, {J. V.} and N. Berger and M. Bertani and D. Bettoni and Bian, {J. M.} and F. Bianchi and E. Boger and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and J. Chai and Chang, {J. F.} and G. Chelkov and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and Chen, {P. L.} and Chen, {S. J.} and Chen, {X. R.} and Chen, {Y. B.} and Chu, {X. K.} and G. Cibinetto and Dai, {H. L.} and Dai, {J. P.} and A. Dbeyssi and D. Dedovich and Deng, {Z. Y.} and A. Denig and I. Denysenko and Muchnoi, {N. Yu} and Nikolaev, {I. B.}",

note = "Publisher Copyright: {\textcopyright} 2018 authors. Published by the American Physical Society.",

year = "2018",

month = aug,

day = "10",

doi = "10.1103/PhysRevD.98.032006",

language = "English",

volume = "98",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "AMER PHYSICAL SOC",

number = "3",

}

RIS

TY - JOUR

T1 - Observation of ψ (3686) →n n ̄ and improved measurement of ψ (3686) →p p ̄

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, J. Z.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Ban, Y.

AU - Bennett, D. W.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bian, J. M.

AU - Bianchi, F.

AU - Boger, E.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chai, J.

AU - Chang, J. F.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, P. L.

AU - Chen, S. J.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Chu, X. K.

AU - Cibinetto, G.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dbeyssi, A.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Denig, A.

AU - Denysenko, I.

AU - Muchnoi, N. Yu

AU - Nikolaev, I. B.

PY - 2018/8/10

Y1 - 2018/8/10

N2 - We observe the decay ψ(3686)→nn̄ for the first time and measure ψ(3686)→pp̄ with improved accuracy by using 1.07×108 ψ(3686) events collected with the BESIII detector. The measured branching fractions are B(ψ(3686)→nn̄)=(3.06±0.06±0.14)×10-4 and B(ψ(3686)→pp̄)=(3.05±0.02±0.12)×10-4. Here, the first uncertainties are statistical, and the second ones are systematic. With the hypothesis that the polar angular distributions of the neutron and proton in the center-of-mass system obey 1+αcos2θ, we determine the α parameters to be αnn̄=0.68±0.12±0.11 and αpp̄=1.03±0.06±0.03 for ψ(3686)→nn̄ and ψ(3686)→pp̄, respectively.

AB - We observe the decay ψ(3686)→nn̄ for the first time and measure ψ(3686)→pp̄ with improved accuracy by using 1.07×108 ψ(3686) events collected with the BESIII detector. The measured branching fractions are B(ψ(3686)→nn̄)=(3.06±0.06±0.14)×10-4 and B(ψ(3686)→pp̄)=(3.05±0.02±0.12)×10-4. Here, the first uncertainties are statistical, and the second ones are systematic. With the hypothesis that the polar angular distributions of the neutron and proton in the center-of-mass system obey 1+αcos2θ, we determine the α parameters to be αnn̄=0.68±0.12±0.11 and αpp̄=1.03±0.06±0.03 for ψ(3686)→nn̄ and ψ(3686)→pp̄, respectively.

KW - BARYON-ANTIBARYON PAIRS

KW - J/PSI DECAYS

KW - AMPLITUDES

KW - BESIII

KW - ANNIHILATION

KW - TESTS

KW - PHASE

UR - http://www.scopus.com/inward/record.url?scp=85053008547&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.98.032006

DO - 10.1103/PhysRevD.98.032006

M3 - Article

AN - SCOPUS:85053008547

VL - 98

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 3

M1 - 032006

ER -

ID: 16459336