000000890 001__ 890
000000890 005__ 20180629065354.0
000000890 037__ $$aBELLE2-NOTE-PL-2018-010
000000890 041__ $$aeng
000000890 100__ $$aKarim Trabelsi
000000890 245__ $$aPlots of D* → D π, D→ K π in 5 pb-1 of collision data
000000890 260__ $$a$$c2018-05-31
000000890 300__ $$a1
000000890 520__ $$aThis figure shows the invariant mass distributions of charm candidates in 5 pb$^{-1}$ of collision data, in the mode $D^{*+}\to D^0 \pi^+$, $D^0 \to K^- \pi^+$.         On the left is a 2-D plot of $\Delta M$ and $M(K\pi)$, on the upper right is $\Delta M$ for $1.845 < M(K\pi) < 1.885$ GeV/$c^2$ and on the lower right is $M(K\pi)$ for $0.144 < \Delta M < 0.146$ GeV/$c^2$.           Events are required to contain at least three good tracks to purity the sample with processes of the type $e^+e^- \to $ hadrons, while rejecting beam induced background, Bhabha scattering, and other low multiplicity background sources.     The charged kaon and pion tracks are required to have impact parameters, $|d_0|$ and $|z_0|$ less than 0.5 cm and 3.0 cm respectively. No particle identification criteria are applied. The $D^*$ candidates are required to have a centre-of-mass momentum of greater than 2.5 GeV/$c$ to select $c\bar c$ events.    The internal document reference is BELLE2-NOTE-PH-2018-004.
000000890 700__ $$aVishal Bhardwaj
000000890 8560_ $$fphillip.urquijo@desy.de
000000890 8564_ $$uhttps://docs.belle2.org/record/890/files/BELLE2-NOTE-PL-2018-010.pdf
000000890 8564_ $$uhttps://docs.belle2.org/record/890/files/Version%203.pdf
000000890 8564_ $$uhttps://docs.belle2.org/record/890/files/Version%203.gif?subformat=icon$$xicon
000000890 8564_ $$uhttps://docs.belle2.org/record/890/files/Version%203.gif?subformat=icon-700$$xicon-700