Recoil polarization for Delta excitation in pion electroproduction -
art. no. 102002

Kelly, JJ; Roche, RE; Chai, Z; Jones, MK; Gayou, O and; Sarty, AJ; Frullani, S; Aniol, K; Beise, EJ; Benmokhtar, F; and Bertozzi, W; Boeglin, WU; Botto, T; Brash, EJ; Breuer, H; and Brown, E; Burtin, E; Calarco, JR; Cavata, C; Chang, CC; and Chant, NS; Chen, JP; Coman, M; Crovelli, D; De Leo, R; and Dieterich, S; Escoffier, S; Fissum, KG; Garde, V and; Garibaldi, F; Georgakopoulus, S; Gilad, S; Gilman, R and; Glashausser, C; Hansen, JO; Higinbotham, DW; Hotta, A and; Huber, GM; Ibrahim, H; Iodice, M; de Jager, CW; Jiang, X and; Klimenko, A; Kozlov, A; Kumbartzki, G; Kuss, M; Lagamba, L; and Laveissiere, G; LeRose, JJ; Lindgren, RA; Liyanage, N and; Lolos, GJ; Lourie, RW; Margaziotis, DJ; Marie, F; Markowitz,; P; McAleer, S; Meekins, D; Michaels, R; Milbrath, BD and; Mitchell, J; Nappa, J; Neyret, D; Perdrisat, CF; Potokar, M; and Punjabi, VA; Pussieux, T; Ransome, RD; Roos, PG and; Rvachev, M; Saha, A; Sirca, S; Suleiman, R; Strauch, S and; Templon, JA; Todor, L; Ulmer, PE; Urciuoli, GM; Weinstein,; LB; Wijesooriya, K; Wojtsekhowski, B; Zheng, X; Zhu, L and; Jefferson Lab E91011 Collaboration; Hall A Collaboration

doi:10.1103/PhysRevLett.95.102001

Μονάδα:

Ερευνητικό υλικό ΕΚΠΑ

Τίτλος:

Recoil polarization for Delta excitation in pion electroproduction -
art. no. 102002

Γλώσσες Τεκμηρίου:

Αγγλικά

Περίληψη:

We measured angular distributions of recoil-polarization response
functions for neutral pion electroproduction for W=1.23 GeV at Q(2)=1.0
(GeV/c)(2), obtaining 14 separated response functions plus 2 Rosenbluth
combinations; of these, 12 have been observed for the first time.
Dynamical models do not describe quantities governed by imaginary parts
of interference products well, indicating the need for adjusting
magnitudes and phases for nonresonant amplitudes. We performed a nearly
model-independent multipole analysis and obtained values for Re
(S1+/M1+)= -(6.84 +/- 0.15)% and Re (E1+/M1+)= -(2.91 +/- 0.19)% that
are distinctly different from those from the traditional Legendre
analysis based upon M1+ dominance and l(pi)<= 1 truncation.

Έτος δημοσίευσης:

2005

Συγγραφείς:

Kelly, JJ
Roche, RE
Chai, Z
Jones, MK
Gayou, O and
Sarty, AJ
Frullani, S
Aniol, K
Beise, EJ
Benmokhtar, F
and Bertozzi, W
Boeglin, WU
Botto, T
Brash, EJ
Breuer, H
and Brown, E
Burtin, E
Calarco, JR
Cavata, C
Chang, CC
and Chant, NS
Chen, JP
Coman, M
Crovelli, D
De Leo, R
and Dieterich, S
Escoffier, S
Fissum, KG
Garde, V and
Garibaldi, F
Georgakopoulus, S
Gilad, S
Gilman, R and
Glashausser, C
Hansen, JO
Higinbotham, DW
Hotta, A and
Huber, GM
Ibrahim, H
Iodice, M
de Jager, CW
Jiang, X and
Klimenko, A
Kozlov, A
Kumbartzki, G
Kuss, M
Lagamba, L
and Laveissiere, G
LeRose, JJ
Lindgren, RA
Liyanage, N and
Lolos, GJ
Lourie, RW
Margaziotis, DJ
Marie, F
Markowitz,
P
McAleer, S
Meekins, D
Michaels, R
Milbrath, BD and
Mitchell, J
Nappa, J
Neyret, D
Perdrisat, CF
Potokar, M
and Punjabi, VA
Pussieux, T
Ransome, RD
Roos, PG and
Rvachev, M
Saha, A
Sirca, S
Suleiman, R
Strauch, S and
Templon, JA
Todor, L
Ulmer, PE
Urciuoli, GM
Weinstein,
LB
Wijesooriya, K
Wojtsekhowski, B
Zheng, X
Zhu, L and
Jefferson Lab E91011 Collaboration
Hall A Collaboration

Περιοδικό:

Physical Review and Physical Review Letters Index

Εκδότης:

AMER PHYSICAL SOC

Τόμος:

Αριθμός / τεύχος:

Επίσημο URL (Εκδότης):

https://doi.org/10.1103/PhysRevLett.95.102001

DOI:

10.1103/PhysRevLett.95.102001

Μόνιμη διεύθυνση:

https://pergamos.lib.uoa.gr/uoa/dl/object/3097333

Recoil polarization for Delta excitation in pion electroproduction - art. no. 102002

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