PHYS 2325 REVIEW PROBLEMS FOR EXAM-3 (CH 10
14)
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
(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
Jolanta Brodzicka
Institute of Nuclear Physics Polish Academy of Sciences
Krakow, Poland
1
Introduction
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 [2] where the comprising quarks group into colour-triplet scalar and
vector clusters interacting dominantly by a gluon exchange. Strong decay proceeds
through qu
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)
0.2
0.15
QCD
0.1
s(MZ) = 0.1189 0.0010
(S Bethke, hep-ex/0606035)
10
HERA s working group
s
HERA
100
= Q or Ejet (GeV)
T
6
Diraction
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
eects
References
[1] C. Royon, these proceedings
[2] V. Chekelian, these proceedings
[3] E. Gallo, these proceedings
[4] H1 and ZEUS collaborations, QCD ts using combined H1 and ZEUS inclusive
data, H1prelim-08-045, ZEUS-prel- 08-003 (2008).
[5] V.N. Gribov and
More details on this topic can be found in [1].
5
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
exa
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
priority. On
Figure 5: Predictions [9] 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
corrections to the ZM-VFNS scheme at medium Q2 , and smoothly matched to a pure
FFNS treatment at low Q2 . This so-called general mass variable avour number
>
scheme (GM-VFNS) is an alternative to the FFNS scheme valid at all Q2 1 GeV2 .
However, in highe
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
28
4487 MeV/c2 and mY (4260) = 424712+17 MeV/c2 , Y (4260) = 1081910 MeV/c2 .
32
The paramete
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.
References
[1] M.B. Volo
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
(you
Stefano Giagu
Heavy B Hadrons
Table 4: CP-violation related results.
Mode
ACP (B 0 K + )
0
ACP (Bs K + )
ACP (b pK )
ACP (0 p )
b
Measurement
-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.
3.1
H1 Analysis
H1 performed two independent analyses, at medium [8] and high [9] 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
from HERA
Vladimir Chekelian (Shekelyan)
Max-Planck-Institute fr Physik
u
Fhringer Ring 6, 80805 Munich, Germany
o
1
Abstract
Measurements of the longitudinal structure function FL at the ep collider HERA
are p
If the electric potential in a region is given by V(x) = 6/x2, the x component of the electric field in
that region is
A) -12x-3.
B) -6x.
C) 12x-3.
D) 12x.
E) 6x.
Answer: C
23.41.
IDENTIFY and SET UP:
kq
V
R
E
(iii)
kq
V
r
outside the sphere and
at all p
Questions 1 and 2 refer to a rectangular loop of wire that is pulled into a region where the
constant magnetic field B points into the page as shown. The velocity is constant and the
resistance of the loop is R.
1. The current induced through the resistor
PRACTICE TEST QUESTIONS
PHYSICS 1322, PROFESSOR CARLOS R ORDONEZ
SPRING 2017
1) A block of ice at 0.000C is added to a well-insulated 147-g aluminum calorimeter cup that
holds 200 g of water at 10.0C. The water and aluminum cup are in thermal equilibrium,