PHYS 2325 REVIEW PROBLEMS FOR EXAM-3 (CH 10
1. Calculate the moment of inertia of a wheel (assume disk) of mass 2.50 kg and
radius = 1.40 m.
2. Calculate the angular acceleration of a disk of radius 1.5 m and moment of
inertial 4.00 kgm2 if a
Fit to the M (J/ + ) with two coherent Breit-Wigner functions gives parameters
of the Y (4008) and Y (4260) to be: mY (4008) = 400840+114 MeV/c2 , Y (4008) = 226
4487 MeV/c2 and mY (4260) = 424712+17 MeV/c2 , Y (4260) = 1081910 MeV/c2 .
(nS) cross section (pb)
experimental results seem to support these predictions.
Belle using their data sample collected at the (5S) mass (10.87 GeV), studied dipion transitions of the (5S) and found unexpectedly large signals for the
(1S) + and (2S) + ch
known quantum numbers of parent B meson allow ones to determine further the
spin-parity of the produced Xcc by performing angular analysis.
Initial state radiation (ISR) process corresponds to the case when the initial e+
or e radiates photon(s) making th
Exotic hadron spectroscopy
Institute of Nuclear Physics Polish Academy of Sciences
The recent discovery of several charmonium and charmonium-like resonances indicates a renaissance of the cc spectroscopy. Ma
Tetraquark is a tightly bound four-quark state of for example diquark-diantiquark
conguration  where the comprising quarks group into colour-triplet scalar and
vector clusters interacting dominantly by a gluon exchange. Strong decay proceeds
ZEUS (inclusive-jet NC DIS)
ZEUS (inclusive-jet p)
ZEUS (norm. dijet NC DIS)
H1 (norm. inclusive-jet NC DIS)
H1 (event shapes NC DIS)
s(MZ) = 0.1189 0.0010
(S Bethke, hep-ex/0606035)
HERA s working group
= Q or Ejet (GeV)
Diractive production (i.e. via the exchange of a colourless hadronic state with vacuum quantumm numbers, sometimes called a pomeron) of vector mesons and/or
inclusive hadronic nal states yields another handle to study nonpertubative QCD
 C. Royon, these proceedings
 V. Chekelian, these proceedings
 E. Gallo, these proceedings
 H1 and ZEUS collaborations, QCD ts using combined H1 and ZEUS inclusive
data, H1prelim-08-045, ZEUS-prel- 08-003 (2008).
 V.N. Gribov and
More details on this topic can be found in .
Photons and heavy avours in photoproduction
Further insights into the validity of perturbative QCD can be obtained from the
photoproduction of nal states including direct photons or heavy avours. As an
Combining such results between H1 and ZEUS, and integrating them into global ts,
is expected to further reduce the experimental uncertainties. The goal to reduce
the theoretical uncertainties through NNLO calculations should thus be of utmost
Figure 5: Predictions  for W production at LHC using xed target data only
(left) HERA I data from one of the two experiments (center) and the combined
HERAPDF0.1. Only the experimental uncertainties are shown here for illustration.
Tevatron), with rst
are: conrmation of the states by other experiments, measurement their quantum
numbers and searching for other decay modes. Whereas from the theory side better
understanding of the thresholds and coupled channel eects is necessary.
 M.B. Volo
B0 Events / 10 (MeV/c2)
B+ Events / 10 (MeV/c2)
threshold. However the c1 (2P ) charmonium assignment, suggested by the mass and
width of the Y (3940), cannot be excluded. This can be tested by searching for the
DD decay mode which should dominate for c1
Phys 2325: Exam 1 Class: 9am Index #2 ‘ Name:
This is a closed—book exam. You can only have one page of your note. You may have a calculator, but no
other electronic devices, laptops, cell phones, etc. Write down all your detail work and/or reasoning
Heavy B Hadrons
Table 4: CP-violation related results.
ACP (B 0 K + )
ACP (Bs K + )
ACP (b pK )
ACP (0 p )
-0.086 0.023 0.009
0.39 0.15 0.08
-0.37 0.17 0.03
-0.03 0.17 0.05
The decays 0 p and 0 pK are allowed at tree lev
against two back-to-back energy depositions in the calorimeters.
In addition, a method of statistical background subtraction is applied for the
Ep = 460 and 575 GeV data at high y (0.38 < y < 0.90 and Ee < 18 GeV). The
method relies on the determination o
positron signals. The large size of this background, mostly due to the photoproduction
process at Q2 0, makes the measurement at high y especially challenging.
H1 performed two independent analyses, at medium  and high  Q2 , with the
The cross section is determined by two independent structure functions, F2 and
FL . They are related to the p interaction cross sections of longitudinally and
transversely polarised virtual photons, L and T , according to F2 (L + T ) and
FL L , therefore
Longitudinal Structure Function Measurements
Vladimir Chekelian (Shekelyan)
Max-Planck-Institute fr Physik
Fhringer Ring 6, 80805 Munich, Germany
Measurements of the longitudinal structure function FL at the ep collider HERA
Problem Set #4
1. Find the total resistance and the total current in the circuit
2. A series RC circuit has a time constant of 0.5 s. The battery has
a voltage of 50 V and the maximum current just after closing the
switch is 21
y A sin( kx t )
y A sin(
x 2 ft )
4 r 2
vsound (331m / s ) (1
B 10 log 12
Problem Set #2
1. By what amount (dB) does the intensity decrease when your distance
from a source of sound increases by a factor of 5?
2. With what speed must a source of sound approach you in order to
observe a 23% increase in its frequency? Let the spe
Problem Set #8
1. If the distance between two slits is 0.75 m and the distance to a
screen is 1.5 m, find the angular spacing between the first-order
bright fringes for light of 579 nm and 632 nm wavelength.
2. Two planets are circling a star 25.1 light y
Problem Set #3
1. Two point charges are 10 cm apart as shown. The electric field at
point P is zero. How far is P from Q1?
2. The quantity of charge q(in coulombs) that passes through a surface
of area 2.00 cm2 varies with time ac