Where wast thou when I laid the foundations of the earth?
declare, if thou hast understanding.
Job 38:4
"Physicists from CERN’s LHCb Collaboration have discovered a new tetraquark particle, named X(6900), composed of two charm quarks and two charm antiquarks.
Quarks are point-like elementary particles that typically come in packages of two (mesons) or three (baryons), the most familiar of which are the proton and neutron — each is made of three quarks.
There are six types — or flavors — of quark to choose from: up, down, strange, charm, bottom and top. Each of these also has an antimatter counterpart.....the LHCb physicists reported the observation of two pentaquarks, Pc(4450)+ and Pc(4380)+.
“Particles made up of four quarks are already exotic, and the one we have just discovered is the first to be made up of four heavy quarks of the same type, specifically two charm quarks and two charm antiquarks,” said Dr. Giovanni Passaleva, the outgoing spokesperson of the LHCb Collaboration.
“Up until now, the LHCb and other experiments had only observed tetraquarks with two heavy quarks at most and none with more than two quarks of the same type.”
The deviation of the data from nonresonantJ/ψ
-pair production is above five standard deviations in the mass region between 6.2
and 7.4GeV/c 2
, covering predicted masses of states composed of four charm quarks. The mass and natural width of the narrow X(6900)
structure are measured assuming a Breit--Wigner lineshape."
SciNews
declare, if thou hast understanding.
Job 38:4
"Physicists from CERN’s LHCb Collaboration have discovered a new tetraquark particle, named X(6900), composed of two charm quarks and two charm antiquarks.
Quarks are point-like elementary particles that typically come in packages of two (mesons) or three (baryons), the most familiar of which are the proton and neutron — each is made of three quarks.
There are six types — or flavors — of quark to choose from: up, down, strange, charm, bottom and top. Each of these also has an antimatter counterpart.....the LHCb physicists reported the observation of two pentaquarks, Pc(4450)+ and Pc(4380)+.
“Particles made up of four quarks are already exotic, and the one we have just discovered is the first to be made up of four heavy quarks of the same type, specifically two charm quarks and two charm antiquarks,” said Dr. Giovanni Passaleva, the outgoing spokesperson of the LHCb Collaboration.
“Up until now, the LHCb and other experiments had only observed tetraquarks with two heavy quarks at most and none with more than two quarks of the same type.”
The deviation of the data from nonresonant
SciNews