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Single spin asymmetry in polarized protonaproton elastic scattering at

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

Physics letters. B, 2013-02, Vol.719 (1a3), p.62-69 [Periódico revisado por pares]

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Título:
Single spin asymmetry in polarized protonaproton elastic scattering at
Autor: 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
Assuntos: Amplitudes ; Asymmetry ; Elastic scattering ; Elementary particles ; Energy (nuclear) ; Particle spin ; Pomerons ; Scattering amplitude
É parte de: Physics letters. B, 2013-02, Vol.719 (1a3), p.62-69
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
content type line 23
ObjectType-Feature-1
Descrição: 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.
Idioma: Inglês

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