We study strong decays of the possible fully-charm tetraquarks recently observed by LHCb,and calculate their relative branching ratios through the Fierz rearrangement.Together with our previous QCD sum rule study,our ...We study strong decays of the possible fully-charm tetraquarks recently observed by LHCb,and calculate their relative branching ratios through the Fierz rearrangement.Together with our previous QCD sum rule study,our results suggest that the broad structure around 6.2–6.8 GeV can be interpreted as an S-wave cccc tetraquark state with JPC=0++or 2++,and the narrow structure around 6.9 GeV can be interpreted as a P-wave one with JPC=0-+or 1-+.These structures were observed in the di-J=w invariant mass spectrum,and we propose to confirm them in the di-gc;J/ψhc;ηcχc0,and ηcχc1channels.We also propose to search for their partner states having the negative charge-conjugation parity in the J/ψηc;J/ψχc0;J/ψχc1,and ηchc channels.展开更多
Inspired by the recent discovery of the X(6900) meson in the LHCb experiment,we investigate the inclusive production rate of the C-odd fully-charmed tetraquarks associated with light hadrons at the B factory within th...Inspired by the recent discovery of the X(6900) meson in the LHCb experiment,we investigate the inclusive production rate of the C-odd fully-charmed tetraquarks associated with light hadrons at the B factory within the nonrelativistic QCD(NRQCD) factorization framework.The short-distance coefficient is computed at the lowest order of velocity and α_(S).Employing two different kinds of phenomenological models to approximately estimate the long-distance NRQCD matrix element,we predict the rate for the inclusive production of the 1^(+-)T_(4c) state and discuss the observation prospect of the Belle 2 experiment.展开更多
基金supported by the National Natural Science Foundation of China (11722540 and 11975033)the Chinese National Youth Thousand Talents Program+2 种基金the China National Funds for Distinguished Young Scientists (11825503)the National Program for Support of Top-notch Young Professionalsthe Fundamental Research Funds for the Central Universities。
文摘We study strong decays of the possible fully-charm tetraquarks recently observed by LHCb,and calculate their relative branching ratios through the Fierz rearrangement.Together with our previous QCD sum rule study,our results suggest that the broad structure around 6.2–6.8 GeV can be interpreted as an S-wave cccc tetraquark state with JPC=0++or 2++,and the narrow structure around 6.9 GeV can be interpreted as a P-wave one with JPC=0-+or 1-+.These structures were observed in the di-J=w invariant mass spectrum,and we propose to confirm them in the di-gc;J/ψhc;ηcχc0,and ηcχc1channels.We also propose to search for their partner states having the negative charge-conjugation parity in the J/ψηc;J/ψχc0;J/ψχc1,and ηchc channels.
基金supported in part by the National Natural Science Foundation of China(11925506,11875263,12070131001(CRC110by DFG and NSFC))supported by the National Natural Science Foundation of China(11875318,11505285)+3 种基金by the Yue Qi Young Scholar Project in CUMTBsupported by the National Natural Science Foundation of China(11975187)the Natural Science Foundation of ChongQing(cstc2019jcyj-msxmX0479)supported in part by the National Natural Science Foundation of China(11635009)。
文摘Inspired by the recent discovery of the X(6900) meson in the LHCb experiment,we investigate the inclusive production rate of the C-odd fully-charmed tetraquarks associated with light hadrons at the B factory within the nonrelativistic QCD(NRQCD) factorization framework.The short-distance coefficient is computed at the lowest order of velocity and α_(S).Employing two different kinds of phenomenological models to approximately estimate the long-distance NRQCD matrix element,we predict the rate for the inclusive production of the 1^(+-)T_(4c) state and discuss the observation prospect of the Belle 2 experiment.
