scholarly journals Parity Violation from SUSY Vertex Corrections in Deep Inelastic Scattering

1986 ◽  
Vol 39 (4) ◽  
pp. 449
Author(s):  
Lloyd CL Hollenberg ◽  
Bruce HJ McKellar
Keyword(s):  
Supergravity Models ◽  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Parity Violation ◽  
Renormalisation Group ◽  
Deuteron Scattering ◽  
Vertex Corrections ◽  
Wide Range ◽  
The One ◽  
Susy Contribution

Corrections to the eey and qqy vertices, at the one loop level, from intermediate supersymmetric (SUSY) states are calculated. The induced parity-violating interaction between electrons and nucleons is applied to the calculation of the lowest order SUSY contribution to the asymmetry in deep inelastic e + deuteron scattering in both the 'tree-breaking' (TB) and 'renormalisation-group' (RG) supergravity models. The results indicate that, for a wide range of sparticle masses, the SUSY contributions lie well within constraints implied by present measurements.

scholarly journals On next to soft threshold corrections to DIS and SIA processes

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
A. H. Ajjath ◽  
Pooja Mukherjee ◽  
V. Ravindran ◽  
Aparna Sankar ◽  
Surabhi Tiwari
Keyword(s):  
Perturbation Theory ◽  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Strong Coupling ◽  
Cross Sections ◽  
Strong Coupling Constant ◽  
Renormalisation Group ◽  
Coupling Constant ◽  
Parton Level ◽  
Soft Threshold

Abstract We study the perturbative structure of threshold enhanced logarithms in the coefficient functions of deep inelastic scattering (DIS) and semi-inclusive e+e− annihilation (SIA) processes and setup a framework to sum them up to all orders in perturbation theory. Threshold logarithms show up as the distributions ((1−z)−1 logi(1−z))+ from the soft plus virtual (SV) and as logarithms logi(1−z) from next to SV (NSV) contributions. We use the Sudakov differential and the renormalisation group equations along with the factorisation properties of parton level cross sections to obtain the resummed result which predicts SV as well as next to SV contributions to all orders in strong coupling constant. In Mellin N space, we resum the large logarithms of the form logi(N) keeping 1/N corrections. In particular, the towers of logarithms, each of the form $$ {a}_s^n/{N}^{\alpha }{\log}^{2n-\alpha }(N),{a}_s^n/{N}^{\alpha }{\log}^{2n-1-\alpha }(N)\cdots $$ a s n / N α log 2 n − α N , a s n / N α log 2 n − 1 − α N ⋯ etc for α = 0, 1, are summed to all orders in as.

scholarly journals Q2DEPENDENCE OF AZIMUTHAL ASYMMETRIES IN SEMIINCLUSIVE DEEP INELASTIC SCATTERING AND IN DRELL–YAN

2007 ◽  
Vol 22 (12) ◽  
pp. 2145-2171 ◽  
Author(s):  
ELVIO DI SALVO
Keyword(s):  
Theoretical Result ◽  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Energy Scale ◽  
General Argument ◽  
The One ◽  
Azimuthal Asymmetries

We study several azimuthal asymmetries in semiinclusive deep inelastic scattering and in Drell–Yan, interpreting them within the formalism of the quark correlator, with a particular reference to T-odd functions. The correlator contains an undetermined energy scale, which we fix on the basis of a simple and rather general argument. We find a different value than the one assumed in previous treatments of T-odd functions. This implies different predictions on the Q2dependence of the above mentioned asymmetries. Our theoretical result on unpolarized Drell–Yan is compared with available data. Predictions on other azimuthal asymmetries could be tested against yields of planned experiments of Drell–Yan and semiinclusive deep inelastic scattering.

scholarly journals Studies of Backward Particle Production with a Fixed-Target Experiment Using the LHC Beams

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Federico Alberto Ceccopieri
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Basic Concept ◽  
Particle Production ◽  
Fixed Target ◽  
Target Fragmentation ◽  
Target Experiment ◽  
The One ◽  
Hadronic Collisions ◽  
Fixed Target Experiment

The foreseen capability to cover the far backward region at a Fixed-Target Experiment using the LHC beams allows one to explore the dynamics of the target fragmentation in hadronic collisions. In this report we briefly outline the required theoretical framework and discuss a number of studies of forward and backward particle production. By comparing this knowledge with the one accumulated in Deep Inelastic Scattering on target fragmentation, the basic concept of QCD factorisation could be investigated in detail.

Parity-Violation in Deep Inelastic Scattering

2009 ◽  
Author(s):  
K. D. Paschke ◽  
Donald G. Crabb ◽  
Yelena Prok ◽  
Matt Poelker ◽  
Simonetta Liuti ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Parity Violation

scholarly journals Search for parity violation in deep-inelastic scattering of polarized electrons by unpolarized deuterons

1978 ◽  
Vol 18 (7) ◽  
pp. 2223-2226 ◽  
Author(s):  
W. B. Atwood ◽  
R. L. A. Cottrell ◽  
H. DeStaebler ◽  
R. Miller ◽  
H. Pessard ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Parity Violation ◽  
Polarized Electrons

scholarly journals Angularity in DIS at next-to-next-to-leading log accuracy

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Jiawei Zhu ◽  
Daekyoung Kang ◽  
Tanmay Maji
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Cross Section ◽  
Effective Theory ◽  
Event Shape ◽  
Soft Collinear Effective Theory ◽  
Continuous Parameter ◽  
Beam Function ◽  
Wide Range ◽  
Definition Of

Abstract Angularity is a class of event-shape observables that can be measured in deep-inelastic scattering. With its continuous parameter a one can interpolate angularity between thrust and broadening and further access beyond the region. Providing such systematic way to access various observables makes angularity attractive in analysis with event shapes. We give the definition of angularity for DIS and factorize the cross section by using soft-collinear effective theory. The factorization is valid in a wide range of a below and above thrust region but invalid in broadening limit. It contains an angularity beam function, which is new result and we give the expression at $$ \mathcal{O} $$ O (αs). We also perform large log resummation of angularity and make predictions at various values of a at next-to-next-to-leading log accuracy.

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