Double Pion Photoproduction off nuclei - search for the in-medium modification of the σ-meson

被引：0

作者：

Maghrbi, Yasser ^{[1
]}

机构：

[1] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

来源：

MESON 2012 - 12TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS | 2012年 / 37卷

关键词：

D O I：

10.1051/epjconf/20123706012

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The photoproduction of pi(0)pi(0) and pi(0)pi(+/-) pairs has been investigated in view of the of in-medium modifications the sigma-meson. The measurements have been done at the Mainz MAMI accelerator, using the Glasgow photon tagging spectrometer and a 4 pi electromagnetic calorimeter, consisting of the Crystal Ball and TAPS detectors. The measurements covered different nuclear targets (H-2, Li-7, C-12, Ca-40, and Pb-nat) and the statistical quality of the data was improved compared to the previous experiments. The energy and mass dependence of the invariant mass distributions suggests that Final State Interactions play a very important role, but some of the observed effects can also be related to a possible in-medium modification of the sigma-meson.

引用

页数：4

共 50 条

[31] Symmetries and in-medium effects Chiral symmetry breaking and modification of meson properties in a strongly interacting medium [J].

Metag, Volker .

WIGNER 111 - COLOURFUL & DEEP SCIENTIFIC SYMPOSIUM, 2014, 78

[32] In-medium ω-meson broadening and s-wave pion annihilation into e+e- pairs [J].

Wolf, G ;

Friman, B ;

Soyeur, M .

NUCLEAR PHYSICS A, 1998, 640 (01) :129-143

[33] Magnetic dipole and quadrupole response of nuclei, supernova physics and in-medium vector meson scaling [J].

Luttge, C ;

vonNeumannCosel, P ;

Neumeyer, F ;

Richter, A .

NUCLEAR PHYSICS A, 1996, 606 (1-2) :183-200

[34] New experimental and simulated results on nuclear media effects in meson photoproduction off nuclei [J].

Ignatov, A. ;

Bartalini, O. ;

Bellini, V. ;

Bocquet, J. P. ;

Calvat, P. ;

Capogni, M. ;

Casano, M. ;

Castoldi, M. ;

D'Angelo, A. ;

Didelez, J. -P. ;

Di Salvo, R. ;

Fantini, A. ;

Gervino, G. ;

Ghio, F. ;

Girolami, B. ;

Giusa, A. ;

Guidal, M. ;

Hourany, E. ;

Kouznetsov, V. ;

Kunne, R. ;

Lapik, A. ;

Sandri, P. Levi ;

Lleres, A. ;

Moricciani, D. ;

Mushkarenkov, A. ;

Nedorezov, V. ;

Nicoletti, L. ;

Perrin, C. ;

Rebreyend, D. ;

Renard, F. ;

Rudnev, N. ;

Russew, T. ;

Russo, G. ;

Schaerf, C. ;

Sperduto, M. -L. ;

Sutera, M. -C. ;

Turinge, A. .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 61, NO 1, 2008, 61 (01) :253-259

[35] DOUBLE-PION PHOTOPRODUCTION OFF PROTONS BELOW 1GEV [J].

KUSUMEGI, A ;

MISHINA, M ;

MURATA, Y ;

TAKAHASHI, K ;

UKAI, K ;

UENO, K ;

MATSUMOTO, S .

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A, 1972, A 7 (04) :727-+

[36] Beam-Helicity Asymmetries in Double-Pion Photoproduction off the Proton [J].

Krambrich, D. ;

Zehr, F. ;

Fix, A. ;

Roca, L. ;

Aguar, P. ;

Ahrens, J. ;

Annand, J. R. M. ;

Arends, H. J. ;

Beck, R. ;

Bekrenev, V. ;

Boillat, B. ;

Braghieri, A. ;

Branford, D. ;

Briscoe, W. J. ;

Brudvik, J. ;

Cherepnya, S. ;

Codling, R. ;

Downie, E. J. ;

Dexler, P. ;

Glazier, D. I. ;

Grabmayr, P. ;

Gregor, R. ;

Heid, E. ;

Hornidge, D. ;

Jahn, O. ;

Kashevarov, V. L. ;

Knezevic, A. ;

Kondratiev, R. ;

Korolija, M. ;

Kotulla, M. ;

Krusche, B. ;

Kulbardis, A. ;

Lang, M. ;

Lisin, V. ;

Livingston, K. ;

Lugert, S. ;

MacGregor, I. J. D. ;

Manley, D. M. ;

Martinez, M. ;

McGeorge, J. C. ;

Mekterovic, D. ;

Metag, V. ;

Nefkens, B. M. K. ;

Nikolaev, A. ;

Pedroni, P. ;

Pheron, F. ;

Polonski, A. ;

Prakhov, S. N. ;

Price, J. W. ;

Rosner, G. .

PHYSICAL REVIEW LETTERS, 2009, 103 (05)

[37] MEDIUM MODIFICATION OF MESON PROPAGATION BETWEEN 2 NUCLEONS IN FINITE NUCLEI [J].

SARAFIAN, H ;

JOHNSON, MB ;

SICILIANO, ER .

PHYSICAL REVIEW C, 1993, 48 (04) :1988-1998

[38] Coherent photoproduction of η-mesons off 3He - search for η-mesic nuclei [J].

Pheron, F. ;

Ahrens, J. ;

Annand, J. R. M. ;

Arends, H. J. ;

Bantawa, K. ;

Bartolome, P. A. ;

Beck, R. ;

Bekrenev, V. ;

Berghaeuser, H. ;

Boillat, B. ;

Braghieri, A. ;

Branford, D. ;

Briscoe, W. J. ;

Brudvik, J. ;

Cherepnya, S. ;

Demissie, B. ;

Dieterle, M. ;

Downie, E. J. ;

Drexler, P. ;

Glazier, D. I. ;

Heid, E. ;

Fil'kov, L. V. ;

Hornidge, D. ;

Howdle, D. ;

Jahn, O. ;

Jaegle, I. ;

Jude, T. C. ;

Kashevarov, V. L. ;

Keshelashvili, I. ;

Kondratiev, R. ;

Korolija, M. ;

Kotulla, M. ;

Kulbardis, A. ;

Kruglov, S. P. ;

Krusche, B. ;

Lisin, V. ;

Livingston, K. ;

MacGregor, I. J. D. ;

Maghrbi, Y. ;

Mancell, J. ;

Manley, D. M. ;

Marinides, Z. ;

Martinez, M. ;

McGeorge, J. C. ;

McNicoll, E. ;

Mekterovic, D. ;

Metag, V. ;

Micanovic, S. ;

Middleton, D. G. ;

Mushkarenkov, A. .

PHYSICS LETTERS B, 2012, 709 (1-2) :21-27

[39] Double-polarization observable G in neutral-pion photoproduction off the proton [J].

Thiel, A. ;

Eberhardt, H. ;

Lang, M. ;

Afzal, F. ;

Anisovich, A. V. ;

Bantes, B. ;

Bayadilov, D. ;

Beck, R. ;

Bichow, M. ;

Brinkmann, K. -T. ;

Boese, S. ;

Crede, V. ;

Dieterle, M. ;

Dutz, H. ;

Elsner, D. ;

Ewald, R. ;

Fornet-Ponse, K. ;

Friedrich, St. ;

Frommberger, F. ;

Funke, Ch. ;

Goertz, St. ;

Gottschall, M. ;

Gridnev, A. ;

Gruener, M. ;

Gutz, E. ;

Hammann, D. ;

Hammann, Ch. ;

Hannappel, J. ;

Hartmann, J. ;

Hillert, W. ;

Hoffmeister, Ph. ;

Honisch, Ch. ;

Jude, T. ;

Kaiser, D. ;

Kalinowsky, H. ;

Kalischewski, F. ;

Kammer, S. ;

Keshelashvili, I. ;

Klassen, P. ;

Kleber, V. ;

Klein, F. ;

Klempt, E. ;

Koop, K. ;

Krusche, B. ;

Kube, M. ;

Lopatin, I. ;

Mahlberg, Ph. ;

Makonyi, K. ;

Metag, V. ;

Meyer, W. .

EUROPEAN PHYSICAL JOURNAL A, 2017, 53 (01)

[40] Double-polarization observable G in neutral-pion photoproduction off the proton [J].

A. Thiel ;

H. Eberhardt ;

M. Lang ;

F. Afzal ;

A. V. Anisovich ;

B. Bantes ;

D. Bayadilov ;

R. Beck ;

M. Bichow ;

K. -T. Brinkmann ;

S. Böse ;

V. Crede ;

M. Dieterle ;

H. Dutz ;

D. Elsner ;

R. Ewald ;

K. Fornet-Ponse ;

St. Friedrich ;

F. Frommberger ;

Ch. Funke ;

St. Goertz ;

M. Gottschall ;

A. Gridnev ;

M. Grüner ;

E. Gutz ;

D. Hammann ;

Ch. Hammann ;

J. Hannappel ;

J. Hartmann ;

W. Hillert ;

Ph. Hoffmeister ;

Ch. Honisch ;

T. Jude ;

D. Kaiser ;

H. Kalinowsky ;

F. Kalischewski ;

S. Kammer ;

I. Keshelashvili ;

P. Klassen ;

V. Kleber ;

F. Klein ;

E. Klempt ;

K. Koop ;

B. Krusche ;

M. Kube ;

I. Lopatin ;

Ph. Mahlberg ;

K. Makonyi ;

V. Metag ;

W. Meyer .

The European Physical Journal A, 2017, 53

← 1 2 3 4 5 →