Qhov sib txawv tseem ceeb ntawm baryons thiab mesons yog tias baryons muaj kev sib xyaw ntawm peb quark hais, hos mesons muaj ib khub ntawm quark-antiquark hais.
Baryons thiab mesons yog ob hom subatomic hais. Baryons tuaj nyob rau hauv fermions thiab mesons los nyob rau hauv bosons. Txawm li cas los xij, ob qho tib si no yog cov tsev neeg ntawm hadrons. Cov no yog cov khoom nruab nrab ntawm cov atoms. Tag nrho cov khoom no yog ua los ntawm quarks. Quarks yog lub tsev blocks uas tsim txhua yam teeb meem. Yog li ntawd, cov no yog cov ntsiab lus tseem ceeb.
Baryons yog dab tsi?
Baryons yog cov khoom sib xyaw subatomic uas muaj peb qhov quark. Cov khoom no poob rau hauv qeb ntawm fermions vim tias cov khoom no muaj ib nrab ntawm cov lej sib npaug. Txij li thaum nws muaj quarks, baryons tuaj yeem koom nrog kev sib cuam tshuam (muaj zog nuclear quab yuam). Feem ntau cov piv txwv ntawm baryons yog protons thiab neutrons. Raws li cov khoom no muaj peb quarks hauv lawv, peb tuaj yeem hu ua baryon li "triquark". Feem ntau, peb suav hais tias baryons yog cov khoom loj heev thaum piv rau lwm cov subatomic hais. Lwm cov piv txwv rau cov khoom no muaj xws li lambda, sigma, xi thiab omega hais. Ntxiv nrog rau tus nqi thiab tus lej ntawm cov khoom no, peb tuaj yeem muab ob tus lej quantum li baryon tooj (B=1) thiab txawv txawv (S). Kev txawv txawv yog ntsuas nyob rau hauv kev sib piv rau "quarks txawv txawv".
Daim duab 01: Peb Lub Quarks ua rau Omega Baryon Particle
Baryons ua rau feem ntau ntawm cov teeb meem pom. Piv txwv li, protons thiab neutrons yog baryons; Ob qhov no yog cov khoom tseem ceeb ntawm atoms, thiab atoms yog qhov tsawg tshaj plaws ntawm tag nrho cov teeb meem. Txawm li cas los xij, electrons tsis yog baryons; lawv poob rau hauv ib tsev neeg txawv hu ua "lepton". Qhov txawv yog tias lepton tsis cuam tshuam los ntawm lub zog muaj zog.
Mesons yog dab tsi?
Mesons yog cov khoom siv subatomic uas muaj ib khub ntawm quark thiab antiquark. Mesons tuaj nyob rau hauv qeb ntawm bosons. Tag nrho cov meson hais yog tsis ruaj khov. Cov khoom no yuav lwj, tsim cov electrons thiab neutrinos yog tias meson muaj nqi. Tab sis cov mesons uas tsis tau them nyiaj tau ploj mus ua photons. Cov mesons muaj qhov sib npaug sib npaug (baryons muaj ib nrab-tus lej spin).
Pion is the meson meson. Mesons tuaj yeem koom nrog ob qho tib si tsis muaj zog thiab muaj zog sib cuam tshuam. Ntxiv mus, yog tias meson muaj nqi, nws tuaj yeem koom nrog kev sib cuam tshuam electromagnetic ib yam nkaus. Peb tuaj yeem faib cov khoom no raws li cov ntsiab lus quark, tag nrho cov angular momentum, parity, thiab lwm yam. Txawm hais tias tag nrho cov mesons tsis ruaj khov, mesons uas muaj qhov loj me yog qhov ruaj khov dua li qhov loj.
Qhov txawv ntawm Baryons thiab Mesons yog dab tsi?
Hauv luv luv, baryons thiab mesons yog subatomic hais txog teeb meem peb tuaj yeem faib raws li tus naj npawb ntawm quarks tam sim no hauv lawv. Qhov sib txawv tseem ceeb ntawm baryons thiab mesons yog tias baryons muaj kev sib xyaw ntawm peb quark hais, hos mesons muaj ib khub ntawm quark-antiquark hais.
Tsis tas li ntawd, baryons tuaj nyob rau hauv tsev neeg ntawm fermions vim nws muaj ib nrab tus lej spin. Txawm li cas los xij, mesons tuaj nyob rau hauv bosons vim nws muaj integer spin. Qee qhov piv txwv rau baryons suav nrog protons thiab neutrons thaum rau mesons, cov piv txwv feem ntau yog photons, electrons thiab neutrinos.
Hauv qab infographic qhia txog qhov sib txawv ntawm baryons thiab mesons, sib piv.
Summary – Baryons vs Mesons
Hauv cov ntsiab lus, baryons thiab mesons yog subatomic hais hauv teeb meem. Qhov sib txawv tseem ceeb ntawm baryons thiab mesons yog tias baryons muaj kev sib xyaw ntawm peb quark hais, hos mesons muaj ib khub ntawm quark-antiquark hais.
