Observation of a new structure near 10.75 GeV in the energy dependence of the e + e − → ϒ (nS)π + π − (n = 1, 2, 3) cross sections

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Observation of a new structure near 10.75 GeV in the energy dependence of the e ⁺ e ⁻ → ϒ (nS)π ⁺ π ⁻ (n = 1, 2, 3) cross sections. / The BELLE collaboration ; Кроковный, Павел Петрович.

In: Journal of High Energy Physics, Vol. 2019, No. 10, 220, 01.10.2019.

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

BibTeX

@article{50ed80dcbf09400a916dd29c1bafc628,

title = "Observation of a new structure near 10.75 GeV in the energy dependence of the e + e − → ϒ (nS)π + π − (n = 1, 2, 3) cross sections",

abstract = "We report a new measurement of the e+e−→ ϒ(nS)π+π− (n = 1, 2, 3) cross sections at energies from 10.52 to 11.02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. We observe a new structure in the energy dependence of the cross sections; if described by a Breit-Wigner function its mass and width are found to be M=(10752.7±5.9−1.1+0.7)MeV/c2 and Γ=(35.5−11.3−3.3+17.6+3.9)MeV, where the first error is statistical and the second is systematic. The global significance of the new structure including systematic uncertainty is 5.2 standard deviations. We also find evidence for the e+e−→ ϒ (1S)π+π− process at the energy 10.52 GeV, which is below the BB¯ threshold.",

keywords = "e+-e- Experiments, Quarkonium, Spectroscopy, e plus -e- Experiments, RADIATIVE-CORRECTIONS",

author = "{The BELLE collaboration} and R. Mizuk and A. Bondar and I. Adachi and H. Aihara and Asner, {D. M.} and V. Aulchenko and T. Aushev and R. Ayad and I. Badhrees and S. Bahinipati and Bakich, {A. M.} and P. Behera and C. Bele{\~n}o and M. Berger and V. Bhardwaj and T. Bilka and J. Biswal and A. Bozek and M. Bra{\v c}ko and Browder, {T. E.} and M. Campajola and L. Cao and D. {\v C}ervenkov and A. Chen and Cheon, {B. G.} and K. Chilikin and Cho, {H. E.} and K. Cho and Choi, {S. K.} and Y. Choi and D. Cinabro and S. Cunliffe and N. Dash and {De Nardo}, G. and {Di Capua}, F. and {Di Carlo}, S. and Z. Dole{\v z}al and Dong, {T. V.} and S. Eidelman and D. Epifanov and Fast, {J. E.} and T. Ferber and Fulsom, {B. G.} and A. Garmash and A. Kuzmin and D. Matvienko and B. Shwartz and Y. Usov and A. Vinokurova and V. Zhilich and Кроковный, {Павел Петрович}",

year = "2019",

month = oct,

day = "1",

doi = "10.1007/JHEP10(2019)220",

language = "English",

volume = "2019",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer US",

number = "10",

}

RIS

TY - JOUR

T1 - Observation of a new structure near 10.75 GeV in the energy dependence of the e + e − → ϒ (nS)π + π − (n = 1, 2, 3) cross sections

AU - The BELLE collaboration

AU - Mizuk, R.

AU - Bondar, A.

AU - Adachi, I.

AU - Aihara, H.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Badhrees, I.

AU - Bahinipati, S.

AU - Bakich, A. M.

AU - Behera, P.

AU - Beleño, C.

AU - Berger, M.

AU - Bhardwaj, V.

AU - Bilka, T.

AU - Biswal, J.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Campajola, M.

AU - Cao, L.

AU - Červenkov, D.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, H. E.

AU - Cho, K.

AU - Choi, S. K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Dash, N.

AU - De Nardo, G.

AU - Di Capua, F.

AU - Di Carlo, S.

AU - Doležal, Z.

AU - Dong, T. V.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Fast, J. E.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Garmash, A.

AU - Kuzmin, A.

AU - Matvienko, D.

AU - Shwartz, B.

AU - Usov, Y.

AU - Vinokurova, A.

AU - Zhilich, V.

AU - Кроковный, Павел Петрович

PY - 2019/10/1

Y1 - 2019/10/1

N2 - We report a new measurement of the e+e−→ ϒ(nS)π+π− (n = 1, 2, 3) cross sections at energies from 10.52 to 11.02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. We observe a new structure in the energy dependence of the cross sections; if described by a Breit-Wigner function its mass and width are found to be M=(10752.7±5.9−1.1+0.7)MeV/c2 and Γ=(35.5−11.3−3.3+17.6+3.9)MeV, where the first error is statistical and the second is systematic. The global significance of the new structure including systematic uncertainty is 5.2 standard deviations. We also find evidence for the e+e−→ ϒ (1S)π+π− process at the energy 10.52 GeV, which is below the BB¯ threshold.

AB - We report a new measurement of the e+e−→ ϒ(nS)π+π− (n = 1, 2, 3) cross sections at energies from 10.52 to 11.02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. We observe a new structure in the energy dependence of the cross sections; if described by a Breit-Wigner function its mass and width are found to be M=(10752.7±5.9−1.1+0.7)MeV/c2 and Γ=(35.5−11.3−3.3+17.6+3.9)MeV, where the first error is statistical and the second is systematic. The global significance of the new structure including systematic uncertainty is 5.2 standard deviations. We also find evidence for the e+e−→ ϒ (1S)π+π− process at the energy 10.52 GeV, which is below the BB¯ threshold.

KW - e+-e- Experiments

KW - Quarkonium

KW - Spectroscopy

KW - e plus -e- Experiments

KW - RADIATIVE-CORRECTIONS

UR - http://www.scopus.com/inward/record.url?scp=85074894547&partnerID=8YFLogxK

U2 - 10.1007/JHEP10(2019)220

DO - 10.1007/JHEP10(2019)220

M3 - Article

AN - SCOPUS:85074894547

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 10

M1 - 220

ER -

ID: 22337103