Twist-3 fragmentation effects for A in light hadron production from proton–proton collisions

Koike, Y.; Pitonyak, D.; Takagi, Y.; Yoshida, S.

doi:10.1016/j.physletb.2015.11.014

Title: Twist-3 fragmentation effects for A in light hadron production from proton–proton collisions

Full Record
Other Related Research

Abstract

Here, we compute the contribution from the twist-3 fragmentation function for light hadron production in collisions between transversely and longitudinally polarized protons, i.e., View the MathML sourcep↑p^→→hX, which can cause a double-spin asymmetry (DSA) A_LT. This is a naïve T-even twist-3 observable that we analyze in collinear factorization using both Feynman gauge and lightcone gauge as well as give a general proof of color gauge invariance. So far only twist-3 effects in the transversely polarized proton have been studied for A_LT in p↑p^→→hX. However, there are indications that the naïve T-odd transverse single-spin asymmetry (SSA) A_N in p↑p→hX is dominated not by such distribution effects but rather by a fragmentation mechanism. Therefore, one may expect similarly that the fragmentation contribution is important for A_LT. As a result, given possible plans at RHIC to measure this observable, it is timely to provide a calculation of this term.

Authors:: Koike, Y.; Pitonyak, D.; Takagi, Y.; Yoshida, S.

Publication Date:: Fri Jan 01 00:00:00 EST 2016

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1225992

Alternate Identifier(s):: OSTI ID: 1246797

Report Number(s):: BNL-111973-2016-JA
Journal ID: ISSN 0370-2693; S0370269315008618; PII: S0370269315008618

Grant/Contract Number:: SC00112704

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 752 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Riken BNL Research Center; twist-3 effects; spin asymmetries; fragmentation

Citation Formats


                    Koike, Y., Pitonyak, D., Takagi, Y., and Yoshida, S. Twist-3 fragmentation effects for A in light hadron production from proton–proton collisions.  Netherlands: N. p., 2016. 
Web.  doi:10.1016/j.physletb.2015.11.014.

Copy to clipboard


                    Koike, Y., Pitonyak, D., Takagi, Y., & Yoshida, S. Twist-3 fragmentation effects for A in light hadron production from proton–proton collisions.  Netherlands.  https://doi.org/10.1016/j.physletb.2015.11.014

Copy to clipboard


                    Koike, Y., Pitonyak, D., Takagi, Y., and Yoshida, S. Fri .  
"Twist-3 fragmentation effects for A in light hadron production from proton–proton collisions".  Netherlands.  https://doi.org/10.1016/j.physletb.2015.11.014.

Copy to clipboard


                    
@article{osti_1225992,

  title        = {Twist-3 fragmentation effects for A in light hadron production from proton–proton collisions},

  author       = {Koike, Y. and Pitonyak, D. and Takagi, Y. and Yoshida, S.},

  abstractNote = {Here, we compute the contribution from the twist-3 fragmentation function for light hadron production in collisions between transversely and longitudinally polarized protons, i.e., View the MathML sourcep↑p→→hX, which can cause a double-spin asymmetry (DSA) ALT. This is a naïve T-even twist-3 observable that we analyze in collinear factorization using both Feynman gauge and lightcone gauge as well as give a general proof of color gauge invariance. So far only twist-3 effects in the transversely polarized proton have been studied for ALT in p↑p→→hX. However, there are indications that the naïve T-odd transverse single-spin asymmetry (SSA) AN in p↑p→hX is dominated not by such distribution effects but rather by a fragmentation mechanism. Therefore, one may expect similarly that the fragmentation contribution is important for ALT. As a result, given possible plans at RHIC to measure this observable, it is timely to provide a calculation of this term.},

  doi          = {10.1016/j.physletb.2015.11.014},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 752,

  place        = {Netherlands},

  year         = {Fri Jan 01 00:00:00 EST 2016},

  month        = {Fri Jan 01 00:00:00 EST 2016}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Publisher's Version of Record
https://doi.org/10.1016/j.physletb.2015.11.014

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 7 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Single-spin asymmetries in the leptoproduction of transversely polarized Λ hyperons

Journal Article Kanazawa, K. ; Metz, A. ; Pitonyak, D. ; ... - Physics Letters. B

We analyze single-spin asymmetries (SSAs) in the leptoproduction of transversely polarized Λ hyperons within the collinear twist-3 formalism. We calculate both the distribution and fragmentation terms in two different gauges (lightcone and Feynman) and show that the results are identical. This is the first time that the fragmentation piece has been analyzed for transversely polarized hadron production within the collinear twist-3 framework. In lightcone gauge we use the same techniques that were employed in computing the analogous piece in p↑ p → π X, which has become an important part to that reaction. With this in mind, we also verifymore »« less
Cited by 18
https://doi.org/10.1016/j.physletb.2015.04.011

Full Text Available
New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem

Journal Article Kanazawa, Koichi ; Pitonyak, Daniel ; Koike, Yuji ; ... - Few-Body Systems

We present a new collinear twist-3 analysis of the transverse SSA A_N at RHIC. We use the TMD Sivers/Collins function to fix some of the relevant collinear twist-3 functions and perform a fit of the RHIC data with other parameterized twist-3 functions. This allows us to keep the consistency among descriptions in pp collision, SIDIS, and e⁺e^– annihilation and thus could provide a unified description of the spin asymmetries in the low- and high-P_T processes. In conclusion, by taking into account the twist-3 fragmentation contribution, we show for the first time this contribution could be the main source of A_Nmore »« less
https://doi.org/10.1007/s00601-014-0913-4

Full Text Available
Comparison of transverse single-spin asymmetries for forward π⁰ production in polarized pp, pAl and pAu collisions at nucleon pair c.m. energy √sNN=200 GeV

Journal Article Adam, J. ; Adamczyk, L. ; Adams, J. R. ; ... - Physical Review D

Tmore »« less
https://doi.org/10.1103/physrevd.103.072005

Full Text Available
Single spin-asymmetry measurements in the inclusive production of pions and protons at high momentum transfer

Miscellaneous Saroff, S Z

This thesis reports the results of Brookhaven Experiment E785, which measured the effect of spin on the inclusive production of secondary particles in proton-proton collisions. By using a transversely polarized proton beam incident on an unpolarized hydrogen target, the analyzing power, A = (N{up arrow} = {alpha}N{down arrow})/(N{up arrow} + {alpha}N{down arrow}), for three reactions: p {up arrow} +p {yields} {pi}{sup +} + X; p {up arrow} +p {yields} p + X; p {up arrow} {yields} {pi}{sup {minus}} + X was measured at incident beam energy of 13.3 and 18.5 GeV/c. The asymmetry is consistent with zero for all datamore »« less
Measurement of Single Spin Asymmetry in ³He↑(e, e'K^±)X from a Transversely Polarized ³He Target

Thesis/Dissertation Zhao, Yuxiang

Spin-dependent observables are a powerful tool to probe the internal structure of the nucleon and to study the dynamics of the strong interaction. Experimental study of the nucleon spin structure has provided us with many exciting and often surprising results. The so-called "spin crisis" in the 1980s revealed the limitation of naive quark-parton models and led to a worldwide effort to study the nucleon spin structure. However, this effort has been focused mainly on the nucleon's longitudinal spin structure. Recently, when the pioneer work revealed the significant role that transverse spin plays in understanding the full structure of the nucleonmore »« less
https://doi.org/10.2172/1346548

Full Text Available

Similar Records