TY - JOUR
T1 - Fixing the number of non-sequential generations within the SU (2) L - U (1) y gauge group
AU - Barreto, Elmer Ramirez
AU - Abad, David Romero
N1 - 10 pages, accepted in Mod. Phys. Lett. A
PY - 2019/11/20
Y1 - 2019/11/20
N2 - In this work, we explore the possibility of fixing the number of new non-sequential chiral-type generations of fermions that could be added to the Standard Model by combining the condition that arise from the anomaly cancellation with the restriction in the number of flavors imposed by the QCD asymptotic freedom. We found that the maximum number of new generations is four, and this allows us, at the same time, to place limits for the electrical charges of quarks and leptons within an SM-like framework. Our result is compatible with the constraints involving new generations and their contributions to the oblique parameters S and T.
AB - In this work, we explore the possibility of fixing the number of new non-sequential chiral-type generations of fermions that could be added to the Standard Model by combining the condition that arise from the anomaly cancellation with the restriction in the number of flavors imposed by the QCD asymptotic freedom. We found that the maximum number of new generations is four, and this allows us, at the same time, to place limits for the electrical charges of quarks and leptons within an SM-like framework. Our result is compatible with the constraints involving new generations and their contributions to the oblique parameters S and T.
KW - Gauge anomaly cancellation
KW - new fermions
KW - QCD asymptotic freedom
UR - http://www.scopus.com/inward/record.url?scp=85070820768&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/fixing-number-nonsequential-generations-within-su-2-l-u-1-y-gauge-group
U2 - 10.1142/S0217732319502924
DO - 10.1142/S0217732319502924
M3 - Artículo
SN - 0217-7323
VL - 34
JO - Modern Physics Letters A
JF - Modern Physics Letters A
IS - 35
M1 - 1950292
ER -