New Structures in the J=ψJ=ψ Mass Spectrum in Proton-Proton Collisions at √s=13 TeV
A search is reported for near-threshold structures in the J=ψJ=ψ invariant mass spectrum produced in proton-proton collisions at √s=13 TeV from data collected by the CMS experiment, corresponding to an integrated luminosity of 135 fb-1. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is observed with a local significance above 5 standard deviations at a mass of 6638(+43 -38) (stat) (+16 -31) (syst) MeV. Another structure with even higher significance is found at a mass of 6847 (+44 -28) (stat) (+48 -20) (syst) MeV, which is consistent with the X(6900) resonance reported by the LHCb experiment and confirmed by the ATLAS experiment. Evidence for another new structure, with a local significance of 4.7 standard deviations, is found at a mass of 7134 (+48 -25) (stat) (+41 -15) (syst) MeV. Results are also reported for a model without interference, which does not fit the data as well and shows mass shifts up to 150 MeV relative to the model with interference
WOS:001202103500001
2023-03-15
132
11
111901
REVIEWED
Funder | Grant Number |
BMBWF (Austria) | |
FWF (Austria) | |
FNRS (Belgium) | |
FWO (Belgium) | |
CNPq (Brazil) | |
CAPES (Brazil) | |
FAPERJ (Brazil) | |
FAPERGS (Brazil) | |
FAPESP (Brazil) | |
MES (Bulgaria) | |
UM (Malaysia) | |
BNSF (Bulgaria) | |
BUAP (Mexico) | |
CERN | |
CINVESTAV (Mexico) | |
CAS | |
CONACYT (Mexico) | |
MoST | |
LNS (Mexico) | |
NSFC | |
SEP (Mexico) | |
Nanjing Normal University | |
UASLP-FAI (Mexico) | |
Tsinghua University Initiative Scientific Research and Dushi Programs | |
MOS (Montenegro) | |
Natural Science Foundation of China (China) | 11975010 |
MBIE (New Zealand) | |
MINCIENCIAS (Colombia) | |
PAEC (Pakistan) | |
MSES (Croatia) | |
NSC (Poland) | |
CSF (Croatia) | |
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ERC PUT (Estonia) | |
MOSTR (Sri Lanka) | |
ERDF (Estonia) | |
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MST (Taipei) | |
MEC (Finland) | |
MHESI (Thailand) | |
HIP (Finland) | |
NSTDA (Thailand) | |
CEA (France) | |
TUBITAK (Turkey) | |
CNRS/IN2P3 (France) | |
TENMAK (Turkey) | |
BMBF (Germany) | |
NASU (Ukraine) | |
DFG (Germany) | |
STFC (United Kingdom) | |
HGF (Germany) | |
DOE ( U.S.) | |
GSRI (Greece) | |
NSF ( U.S.) | |
NKFIH (Hungary) | |
DAE (India) | |
DST (India) | |
IPM (Iran) | |
SFI (Ireland) | |
INFN (Italy) | |
MSIP (Republic of Korea) | |
NRF (Republic of Korea) | |
MES (Latvia) | |
LAS (Lithuania) | |
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