Details

Autor(en) / Beteiligte

• Adamczyk, L
• Agakishiev, G
• Aggarwal, M M
• Ahammed, Z
• Alakhverdyants, A V
• Alekseev, I
• Alford, J
• Anson, C D
• Arkhipkin, D
• Aschenauer, E
• Averichev, G S
• Balewski, J
• Banerjee, A
• Barnovska, Z
• Beavis, DR
• Bellwied, R
• Betancourt, MJ
• Betts, R R
• Bhasin, A
• Bhati, A K
• Bichsel, H
• Bielcik, J
• Bielcikova, J
• Bland, L C
• Bordyuzhin, I G
• Borowski, W
• Bouchet, J
• Brandin, A V
• Brovko, S G
• Bruna, E
• Bueltmann, S
• Bunzarov, I
• Burton, T P
• Butterworth, J
• Cai, X Z
• Caines, H
• Calderon de la Barca Sanchez, M
• Cebra, D
• Cendejas, R
• Cervantes, M C
• Chaloupka, P
• Chang, Z
• Chattopadhyay, S
• Chen, H F
• Chen, J H
• Chen, J Y
• Chen, L
• Cheng, J
• Cherney, M
• Chikanian, A
• et. al

Titel

Single spin asymmetry in polarized protonaproton elastic scattering at

Ist Teil von

• Physics letters. B, 2013-02, Vol.719 (1a3), p.62-69

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report a high precision measurement of the transverse single spin asymmetry A N at the center of mass energy s = 200 GeV in elastic protonaproton scattering by the STAR experiment at RHIC. The A N was measured in the four-momentum transfer squared t range 0.003 <= | t | <= 0.035 (GeV / c) 2 , the region of a significant interference between the electromagnetic and hadronic scattering amplitudes. The measured values of A N and its t-dependence are consistent with a vanishing hadronic spin-flip amplitude, thus providing strong constraints on the ratio of the single spin-flip to the non-flip amplitudes. Since the hadronic amplitude is dominated by the Pomeron amplitude at this s , we conclude that this measurement addresses the question about the presence of a hadronic spin flip due to the Pomeron exchange in polarized protonaproton elastic scattering.