Longitudinal structure function F at low Q2 and low x with model for higher twist: An update
نویسندگان
چکیده
A reanalysis of the model for longitudinal structure function FL(x,Q2) at low x and Q2 was undertaken, in view advent EIC. The is based on photon-gluon fusion mechanism suitably extrapolated to region Q2. It includes kinematic constraint FL∼Q4 as Q2→ 0 higher twist contribution which vanishes Q2→∞. Revised critically updated compared presently available data.
منابع مشابه
The Longitudinal Structure Function F L at Small X
We present a set of formulae to extract the longitudinal deep inelastic structure function F L from the transverse structure function F 2 and its derivative dF 2 /dlnQ 2 at small x. Using F 2 HERA data we obtain F L in the range 10 −4 ≤ x ≤ 10 −2 at Q 2 = 20 GeV 2. We present here the values of F L (x, Q 2) at small x, extracted from experimental HERA data 1,2 using the method of replacement of...
متن کاملMeasurement of the Proton Structure Function F2 at low Q2 in QED Compton Scattering at HERA
The proton structure function F2(x, Q2) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged photon, Q2, down to 0.5 GeV2, and Bjorken x up to ∼0.06, a region which has not been covered previously by inclusive measurements at HERA. The results are in ...
متن کاملAn Estimate of Higher Twist at Small x B and Low Q 2 Based upon a Saturation Model
We investigate the influence of higher twist corrections to deep inelastic structure functions in the low-Q 2 and small-x HERA region. We review the general features of the lowest-order QCD diagrams which contribute to twist-4 at small-x, in particular the sign structure of longitudinal and transverse structure functions which offers the possibility of strong cancellations in F 2. For a numeric...
متن کاملdesign of an analog ram (aram)chip with 10-bit resolution and low-power for signal processing in 0/5m cmos process
برای پردازش سیگنال آنالوگ در شبکه های عصبی ، معمولا نیاز به یک واحد حافظه آنالوگ احساس میشود که بدون احتیاج به a/d وd/a بتواند بطور قابل انعطاف و مطمئن اطلاعات آنالوگ را در خود ذخیره کند. این واحد حافظه باید دارای دقت کافی ، سرعت بالا ، توان تلفاتی کم و سایز کوچک باشد و همچنین اطلاعات را برای زمان کافی در خود نگهدارد. برای پیاده سازی سیستمی که همه این قابلیتها را در خود داشته باشد، کوشش...
15 صفحه اولStudy of HERA ep data at low Q2 and low xBj and the need for higher-twist corrections to standard perturbative QCD fits
I. Abt, A. M. Cooper-Sarkar, B. Foster, V. Myronenko, K. Wichmann, and M. Wing Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, München 80805, Germany Physics Department, University of Oxford, Oxford OX1 3RH, United Kingdom Hamburg University, I. Institute of Experimental Physics, Hamburg 22607, Germany Deutsches Elektronen Synchrotron DESY, Hamburg 22607, Germany Department of Physi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 2022
ISSN: ['0370-2693', '1873-2445']
DOI: https://doi.org/10.1016/j.physletb.2022.137086