Heavy quark spectroscopy and prediction of bottom baryon masses. Marek Karliner DIS’09, Madrid, April 29, 2009. in collaboration with B. Keren-Zur, H.J. Lipkin and J. Rosner. å. =. M. m. i. i. Constituent Quark Models (CQM ).
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Marek Karliner
DIS’09, Madrid, April 29, 2009
in collaboration with B. Keren-Zur, H.J. Lipkin and J. Rosner
=
M
m
i
i
Constituent Quark Models (CQM)M. Karliner, DIS 2009
M. Karliner, DIS 2009
M. Karliner, DIS 2009
M. Karliner, DIS 2009
quark mass difference is the same
in mesons and baryons
but depends on the spectator quark
challenge to npQCD
MK & Lipkin, hep-ph/0307243
s
u
u
d
d
color hyperfine splitting in baryonsM. Karliner, DIS 2009
Quark mass ratio from HF splittings in mesons and baryons
New type of mass relations with more heavy flavors
M. Karliner, DIS 2009
Similar relation for bottom baryons
prediction for mass
(MK & Lipkin, hep-ph/0307243)
M. Karliner, DIS 2009
can rederive without assuming HF ~ 1/m_q
a weaker assumption of same flavor dependence suffices
M. Karliner, DIS 2009
also prediction for spin splitting between and
M. Karliner, DIS 2009
Effective meson-baryon supersymmetry
M. Karliner, DIS 2009
M. Karliner, DIS 2009
Magnetic moments of heavy baryons meson masses:
challenge
to EXP !
M. Karliner, DIS 2009
M. Karliner, DIS 2009
M. Karliner, DIS 2009
M. Karliner, DIS 2009
cancel out the HF coupling constant (v0).
M. Karliner, DIS 2009
M. Karliner, DIS 2009
M. Karliner, DIS 2009
Q experiment
Q
Q
Predicting the mass of baryons
: Qsd or Qsu. (sd), (sd) in spin-0
mass given by
Can obtain (bsd) mass from (csd) + shift in HF:
M. Karliner, DIS 2009
MeV experiment
MeV
several options for obtaining from data:
Q
MeV
M. Karliner, DIS 2009
M. Karliner, DIS 2009 experiment
M. Karliner, DIS 2009 experiment
: bsd with (sd) in S=1; total spin = 1/2 experiment
: bsd with (sd) in S=1; total spin = 3/2
so that
M. Karliner, DIS 2009
M. Karliner, DIS 2009 experiment
Predictions for other bottom baryons experiment
with B.Keren-Zur, H.J. Lipkin and J.L. Rosner
:
M. Karliner, DIS 2009
D0: experimentΩ_b=6165 +/- 10 (stat) +/- 13(syst.)
either wrong or we don’t understand something
M. Karliner, DIS 2009
M. Karliner, DIS 2009 experiment
0802.0649 [hep-ph], Lipkin & M.K.:
might be mediated by tetraquark
below threshold:
analogous to Z(4430)? Seen in but not in
plot of M_inv[Y(mS)]^2 vs. E_ linear
modulo Y(5S), Y(mS) width
Y(mS)+ vs. - = Y(mS)- vs. +
modulo statistics
M. Karliner, DIS 2009
_ experiment
_
Unique signal for bbqq and bbq
double bottom baryons and bb tetratqaurks
_
so bbq J/ψ J/ψ (ssq) J/ψ J/ψΞ
_
_
_
_
_
_
and bbqq
similarly bbqq J/ψ J/ψ (ssqq) J/ψ J/ψ K K
With all final state hadrons coming from the same vertex
Unique signature but v. low rate - is there enough data?
M. Karliner, DIS 2009
Open questions experiment
M. Karliner, DIS 2009
Summary experiment
Backup slides experiment
M. Karliner, DIS 2009
M. Karliner, DIS 2009 experiment
M. Karliner, DIS 2009 experiment