Observation of a cross-section enhancement near mass threshold in e(+)e(-) -> lambda(lambda)over-bar
文献类型：期刊论文
| 作者 | Ablikim, M.1; Achasov, M. N.9,66; Ahmed, S.14; Ai, X. C.1; Albayrak, O.5; Albrecht, M.4; Ambrose, D. J.51; Amoroso, A.1,10,28,30,31,34,56,58; An, F. F.1; An, Q.41,53 |
| 刊名 | Physical review d
 |
| 出版日期 | 2018-02-28 |
| 卷号 | 97期号:3页码:9 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/physrevd.97.032013 |
| 通讯作者 | Ablikim, m.() |
| 英文摘要 | The process e(+)e(-) -> lambda(lambda) over bar is studied using data samples at root s = 2.2324, 2.400, 2.800 and 3.080 gev collected with the besiii detector operating at the bepcii collider. the born cross section is measured at root s = 2.2324 gev, which is 1.0 mevabove the lambda(lambda) over bar mass threshold, to be 305 +/- 45(-36)(+66) pb, where the first uncertainty is statistical and the second systematic. the cross section near threshold is larger than that expected from theory, which predicts the cross section to vanish at threshold. the born cross sections at root s = 2.400, 2.800 and 3.080 gev are measured and found to be consistent with previous experimental results, but with improved precision. finally, the corresponding effective electromagnetic form factors of lambda are deduced. |
| WOS关键词 | TIME-LIKE REGION ; ELECTROMAGNETIC FORM-FACTORS ; NEAR-THRESHOLD ; P(P)OVER-BAR ; BESIII ; PROTON |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000426322600001 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178230 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Ablikim, M. |
| 作者单位 | 1.Inst High Energy Phys, Beijing 100049, Peoples R China 2.Beihang Univ, Beijing 100191, Peoples R China 3.Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China 4.Ruhr Univ Bochum, D-44780 Bochum, Germany 5.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA 6.Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China 7.China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China 8.COMSATS Inst Informat Technol, Def Rd,Off Raiwind Rd, Lahore 54000, Pakistan 9.GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia 10.GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany |
| 推荐引用方式 GB/T 7714 | Ablikim, M.,Achasov, M. N.,Ahmed, S.,et al. Observation of a cross-section enhancement near mass threshold in e(+)e(-) -> lambda(lambda)over-bar[J]. Physical review d,2018,97(3):9. |
| APA | Ablikim, M..,Achasov, M. N..,Ahmed, S..,Ai, X. C..,Albayrak, O..,...&Zou, J. H..(2018).Observation of a cross-section enhancement near mass threshold in e(+)e(-) -> lambda(lambda)over-bar.Physical review d,97(3),9. |
| MLA | Ablikim, M.,et al."Observation of a cross-section enhancement near mass threshold in e(+)e(-) -> lambda(lambda)over-bar".Physical review d 97.3(2018):9. |
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