Lecture 25 Diffraction of Light Diffraction Grating Polarization.
LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC
description
Transcript of LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC
![Page 1: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/1.jpg)
LISHEP, March 2013, Rio de Janeiro
DIFFRACTION at the LHC
László Jenkovszky, Kiev, [email protected]
![Page 2: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/2.jpg)
![Page 3: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/3.jpg)
![Page 4: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/4.jpg)
Some open questions:
0) Definition of diffraction: rapidity gap vs. P exchange;
1) The ratio between SD, DD and CD?
2) Integrated cross section require the knowledge of the M- dependence for all M! Low- and high M:
3) Duality in M (FMSR);
4) Structures in t: a dip in t~1 GeV^2,…
5) The background (in s and in M);
6) Exclusive-inclusive relation;
7) From elastic to inelastic diffraction (dis)continuity.
![Page 5: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/5.jpg)
Simple (but approximate) factorization relations
![Page 6: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/6.jpg)
α(0)\C + - 1 P O
1/2 f ω
(and ratios: σ/B,…….).
![Page 7: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/7.jpg)
![Page 8: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/8.jpg)
![Page 9: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/9.jpg)
![Page 10: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/10.jpg)
![Page 11: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/11.jpg)
Low-mass diffraction dissociation at the LHCL. Jenkovszky, O. Kuprash, J. Lamsa, V. Magas, and R,. Orava:
Dual-Regge approach to high-energy, low-mass DD at the LHC,Phys. Rev. D83(2011)0566014; hep-ph/1-11.0664.
L. Jenkovszky, O. Kuprash, J. Lamsa and R. Orava: hep-ph/11063299, Mod. Phys. Letters A. 26(2011) 1-9, August 2011.
![Page 12: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/12.jpg)
TriTriple Regge (Pomeron) limit::
![Page 13: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/13.jpg)
FNAL
![Page 14: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/14.jpg)
Alternative (to the triple Regge) approach: Diffraction dissociation and DIS :
G.A. Jaroszkiewicz and P.V. Landshoff, Phys. Rev. 10 (1974) 170; A. Donnachie, P.V. Landshoff, Nucl. Phys. B 244 (1984) 322.
![Page 15: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/15.jpg)
R. Fiore {\it et al.} EPJ A 15 (2002) 505,hep-ph/0206027;.R. Fiore {\it et al.} Phys. Rev. D 68 (2004) 014004, hep-ph/0308178.
JLAJLAB LHC; γ P; q^2 t
![Page 16: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/16.jpg)
![Page 17: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/17.jpg)
![Page 18: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/18.jpg)
Low-mass diffraction dissociation at the LHCL. Jenkovszky, O. Kuprash, J. Lamsa, V. Magas, and R,. Orava:
Dual-Regge approach to high-energy, low-mass DD at the LHC,Phys. Rev. D83(2011)0566014; hep-ph/1-11.0664.
L. Jenkovszky, O. Kuprash, J. Lamsa and R. Orava: hep-ph/11063299, Mod. Phys. Letters A. 26(2011) 1-9, August 2011.
![Page 19: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/19.jpg)
AtAt the LHC, in the nearly forward direction, Pomeron exchange dominates;
the rest, e.g. f-exchange, being negligible
![Page 20: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/20.jpg)
![Page 21: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/21.jpg)
![Page 22: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/22.jpg)
![Page 23: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/23.jpg)
![Page 24: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/24.jpg)
![Page 25: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/25.jpg)
![Page 26: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/26.jpg)
SD and DD cross sections
![Page 27: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/27.jpg)
“Reggeized (dual) Breit-Wigner” formula:
![Page 28: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/28.jpg)
SDD cross sections vs. energy.
*Normalization to ~14 mb at 7 TeV.
![Page 29: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/29.jpg)
Approximation of background to reference points (t=-0.05)
![Page 30: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/30.jpg)
Approximation of background to reference points (t=-0.5)
![Page 31: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/31.jpg)
B-slopes for SD
B-slope for SD cross section vs. t for different M2 values
![Page 32: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/32.jpg)
Double differential SD cross sections
(left) Double differential SD cross sections as a functions of M2 for different t values,(right) Double differential SD cross sections as a function of t for different M2 values.
![Page 33: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/33.jpg)
Single differential integrated SD cross sections
![Page 34: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/34.jpg)
DDD cross sections vs. energy.
![Page 35: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/35.jpg)
Integrated DD cross sections
(left) Single differential SD cross sections as a functions of t integrated in different M1:M2 regions.(right) Double differential SD cross sections as a function M2 integrated in region [0.0: 1.0] of t. value.
![Page 36: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/36.jpg)
Triple differential DD cross sections
t = - 0.1 t = - 0.2
t = - 0.3
![Page 37: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/37.jpg)
The parameters and results
![Page 38: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/38.jpg)
Open problems:
1. Interpolation in energy: from the Fermilab and ISR to the LHC; (Inclusion of non-leading contributions);3. Deviation from a simple Pomeron pole model and breakdown of Regge-factorization;4. Experimental studies of the exclusive channels (p+π,…) produced from the decay of resonances (N*, Roper?,,,) in the nearly forward direction.5. Turn down of the cross section towards t=o?!
![Page 39: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/39.jpg)
Prospects (future plans): central diffractive meson production
(double Pomeron exchange)
![Page 40: LISHEP, March 2013, Rio de Janeiro DIFFRACTION at the LHC](https://reader035.fdocuments.in/reader035/viewer/2022062723/5681400e550346895dab4a8d/html5/thumbnails/40.jpg)
Thanks for your attention!
Recent: L. Jenkovszky, R. Orava, A. Salii^ Low-mass single- and double diffraction
dissociation at the LHC, hep-ph, arXiv:1211.5841, Nov. 2012.