Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV

Adamczyk, L.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alakhverdyants, A. V.; Alekseev, I.; Alford, J.; Anderson, B. D.; Anson, C.; Barnovská, Zuzana; Bielčík, Jaroslav; Bielčíková, Jana; Chaloupka, Petr; Chung, Paul; Hajková, O.; Kapitán, Jan; Pachr, M.; Rusňák, Jan; Šumbera, Michal; Tlustý, David

doi:https://dx.doi.org/10.1103/PhysRevD.86.051101

Počet záznamů: 1

Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV

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SYSNO ASEP	0385127
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV
Tvůrce(i)	Adamczyk, L. (PL) Agakishiev, G. (RU) Aggarwal, M. M. (IN) Ahammed, Z. (IN) Alakhverdyants, A. V. (RU) Alekseev, I. (RU) Alford, J. (US) Anderson, B. D. (US) Anson, C. (US) Barnovská, Zuzana (UJF-V) Bielčík, Jaroslav (UJF-V) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Chaloupka, Petr (UJF-V)_RID Chung, Paul (UJF-V) Hajková, O. (CZ) Kapitán, Jan (UJF-V) Pachr, M. (CZ) Rusňák, Jan (UJF-V)_{RID, ORCID, SAI} Šumbera, Michal (UJF-V)_{RID, ORCID, SAI} Tlustý, David (UJF-V)
Celkový počet autorů	365
Zdroj.dok.	Physical Review D. - : American Physical Society - ISSN 1550-7998 Roč. 86, č. 5 (2012), s. 051101
Poč.str.	7 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	natural meson production ; relativistic collisions ; STAR
Vědní obor RIV	BG - Jaderná, atomová a mol. fyzika, urychlovače
CEP	LA09013 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	UJF-V - RVO:61389005
UT WOS	000308344600001
DOI	https://doi.org/10.1103/PhysRevD.86.051101
Anotace	Measurements of the differential cross section and the transverse single-spin asymmetry, A(N), vs x(F) for pi(0) and eta mesons are reported for 0.4 < x(F) < 0.75 at an average pseudorapidity of 3.68. A data sample of approximately 6.3 pb(-1) was analyzed, which was recorded during p(up arrow) + p collisions at root s = 200 GeV by the STAR experiment at RHIC. The average transverse beam polarization was 56%. The cross section for pi(0), including the previously unmeasured region of x(F) > 0.55, is consistent with a perturbative QCD prediction, and the eta/pi(0) cross-section ratio agrees with existing midrapidity measurements. For 0.55 < x(F) < 0.75, the average A(N) for eta is 0.210 +/- 0.056, and that for pi(0) is 0.081 +/- 0.016. The probability that these two asymmetries are equal is similar to 3%.
Pracoviště	Ústav jaderné fyziky
Kontakt	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Rok sběru	2013

Počet záznamů: 1