Author: W. GalbraithPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Charged P1-Meson Production in Proton-proton Collisions at 1 GeV Kinetic Energy
Author: W. GalbraithCharged Π-meson Production in Proton-proton Collisions at 1 GeV Kinetic Energy
Author: W. GalbraithCharged Pi-meson Production in Proton-proton Collisions at 1 GeV Kinetic Energy
Author: W. GalbraithMesons Produced in Proton-proton Collisions
Author: Vincent Zetterberg PetersonPublisher:
ISBN:
Category : Mesons
Languages : en
Pages : 48
Book Description
A Search for Charmed Meson Production in Proton-proton Collisions at the CERN-ISR
Author: Gordon John VanDalenPublisher:
ISBN:
Category : Nuclear physics
Languages : en
Pages : 436
Book Description
Study of Charged Particle Species Produced in Association with B0, B-, and Bs Mesons in Proton - Anti-proton Collisions at S**(1/2)
Author: Denys UsyninPublisher:
ISBN:
Category :
Languages : en
Pages : 198
Book Description
The authors study the yields of charged kaons, charged pions, and protons produced in association with B mesons produced in proton-antiproton collisions at center of mass energy 1960 GeV using 355 pb{sup -1} of data collected with the CDF detector at the Fermilab Tevatron. This is the first reported measurements of these yields at a hadron collider. The B mesons are reconstructed using their semileptonic decays: B{sup 0} {yields} {ell}{sup +}D{sup -}X, D{sup -} {yields} K{sup +}{pi}{sup -}{pi}{sup -}; B{sup 0} {yields} {ell}{sup +}D*{sup -}X, D*{sup -} {yields} {pi}{sup -}{bar D}{sup 0}, {bar D}{sup 0} {yields} K{sup +}{pi}{sup -}; B{sup +} {yields} {ell}{sup +}{bar D}{sup 0}X, {bar D}{sup 0} {yields} K{sup +}{pi}{sup -}; B{sub s}{yields}{ell}{sup +}D{sub s}{sup -}X, D{sub s}{sup -} {yields} {pi}{sup -}{phi}, {phi} {yields} K{sup +}K{sup -}. The K, {pi}, and p are identified using the Time of Flight detector (TOF), the CDF spectrometer, and the specific ionization (dE/dx) measured in the central drift chamber (COT). The fraction of charged kaons produced in association with {bar B}{sub s}{sup 0} mesons is found to be larger than the fraction produced in association with the {bar B}{sup 0} and B{sup -} mesons, as expected from naive models of heavy quark hadronization to mesons. The particle species yields are found to be in qualitative agreement with simulation of B meson production in hadron collisions from the PYTHIA Monte Carlo, although the yield of kaons around {bar B}{sub s}{sup 0} mesons is found to be larger in the simulation when compared to the data. These studies are important for understanding methods of identifying the flavor of {bar B}{sub s}{sup 0} mesons in measurement of {bar B}{sub s}{sup 0} flavor oscillations and charge conjugation-parity (CP) violation in {bar B}{sub s}{sup 0} meson decays.
DEUTERON PRODUCTION IN PROTON-PROTON COLLISIONS FROM 1.5 TO 3 GEV.
Author: DAVID EARL PELLETTPublisher:
ISBN:
Category :
Languages : en
Pages : 165
Book Description
The differential cross section for deuteron production in proton-proton collisions was measured for incident proton kinetic energies of 1.55, 2.5, and 2.9 GeV. Measurements were made at laboratory angles of 5.9, 11.55, 15.72 degrees, and at the two higher energies, at 20 degrees relative to the beam direction for deuteron laboratory momenta in the range 1.0-2.4 GeV/c. The center of mass differential cross section distributions obtained at the three energies of this experiment showed a general similarity to one another. The total deuteron production cross section decreased monotonically with incident proton kinetic energy. The cross section for production of deuterons associated with two or more pions had a maximum near 2 GeV. A search for pion resonances of unit isotopic spin in the mass range 400-1000 MeV through reactions of the form p + p to d + positive-x yielded evidence for RHO meson production. The laboratory distributions in momentum and angle of deuterons produced in proton-proton collisions at 2.9 GeV were found to be much different from those arising from proton-beryllium and proton-platinum collisions at the same energy.
Charged and Neutral Particle Production from 400 GeV/c Proton Proton Collisions
Author: Richard KassNuclear Science Abstracts
Author: Search for Long-lived Charged Particles in Proton-proton Collisions at [math Display
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Results are presented of a search for heavy stable charged particles produced in proton-proton collisions at √s = 13 TeV using a data sample corresponding to an integrated luminosity of 2.5 fb-1 collected in 2015 with the CMS detector at the CERN LHC. The search is conducted using signatures of anomalously high energy deposits in the silicon tracker and long time-of-flight measurements by the muon system. The data are consistent with the expected background, and upper limits are set on the cross sections for production of long-lived gluinos, top squarks, tau sleptons, and lepton-like long-lived fermions. These upper limits are equivalently expressed as lower limits on the masses of new states; the limits for gluinos, ranging up to 1610 GeV, are the most stringent to date. Furthermore, limits on the cross sections for direct pair production of long-lived tau sleptons are also determined.