Observation of New Resonances in the Λb0π+π− Sy

Abstract

We report the observation of a new structure in the Λ 0 b π þ π − spectrum using the full LHCb data set of pp collisions, corresponding to an integrated luminosity of 9 fb −1 , collected at ffiffi ffi s p ¼ 7, 8, and 13 TeV. A study * Full author list given at the end of the article.

Possible interpretation of the newly observed $$\Omega _b$$ states

“…Since the first observation of the beauty baryon b at the CERN pp collider [1], many singly heavy baryons were observed by various world wide experimental facilities in the past three decades [2]. In recent years, there have been specially fruitful in the observation of the heavy baryon states [3][4][5][6][7][8][9]. The rapidly growth of the a e-mail: lyxiao@ustb.edu.cn (corresponding author) b e-mail: wangkaileicz@foxmail.com c e-mail: liumingsheng0001@126.com d e-mail: zhongxh@hunnu.edu.cn experimental progress attracts a a great deal of attention from the hadron physics community.…”

Canonical interpretation of the newly observed Λb(6146)0 and ΛbWei1, Lü2, Zhong3 2019Phys. Rev. D356441View full textAdd to dashboardCite

“…Very recently, the LHCb Collaboration reported the discovery of two new singly bottom baryons Λ b ð6146Þ 0 and Λ b ð6152Þ 0 in the Λ 0 b π þ π − invariant mass distribution [1]. Their measured masses and widths are listed as follows: where the mass gap between these two states is only about 6 MeV.…”

Interpretation of the newly observed Λb(6146) and Λb(6152Wang1, Lü2, Zhong3 2019Phys. Rev. D382250View full textAdd to dashboardCite

“…Both the Σ b (6097) ± and Ξ b (6227) − states favor P wave states with spin-parity J P = 3/2 − or J P = 5/2 − [18][19][20][21][22][23]. Recently, the LHCb collaboration announced the observation of two new bottom baryons Λ b (6146) and Λ b (6152) in the Λ b π + π − decay mode [24]. The measured masses and widths of the Λ b (6146) and Λ b (6152) are presented as follows,…”