Backward production of the B meson in K<sup>−</sup>p interactions at <span class="math"><math><mtext>4.2 </mtext><mtext>GeV</mtext><mtext>c</mtext></math></span>期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Backward production of the B meson in K⁻p interactions at $4.2 GeV c$

Authors:	Ph. Gavillet C. Dionisi A. Gurtu R.J. Hemingway M.J. Losty J.C. Marin M. Mazzucato L. Montanet E. Pagiola R. Blokzijl B. Jongejans J.C. Kluyver G.G.G. Massaro J.J. Engelen J.S.M. Vergeest M. Zralek B. Foster P. Grossmann J. Wells

Affiliation:	CERN, European Organization for Nuclear Research, Geneva, Switzerland;Nuclear Physics Laboratory, University of Oxford, Oxford, UK

Abstract:	The backward production of the B(1235) meson is studied in the reaction K^?p→Σ^?π⁺ω. This reaction is observed in the final state Σ^?π⁺π⁺π^?π⁰. A π⁺ω mass enhancement is visible in the region of the B meson for events with small \|u\|K^? →Σ^?) squared four-momentum transfer. The properties of the enhancement agree with those of the B meson. The cross section for K^?p→Σ^?B⁺ at $4.15 GeV c$ incident K^? momentum is (3.2 ± 0.5) μb. The backward production of the B meson is compared with similar baryon exchange productions of the A₁ and C(Q₁) axial vector mesons observed in the same experiment.

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